What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
To stop unknown invitations from appearing automatically, open Google Calendar on a computer and go to Settings → General → Event settings → Add invitations to my calendar. Choose Only if the sender is known. For stricter control, choose When I respond to the invitation in email. These settings govern new invitations; a spam event already on your calendar, repeated invitations from one organizer, and events created by an app need different fixes.
Choose the fix that matches the spam
Calendar spam can arrive as an invitation sent through Google Calendar, repeated invitations from one organizer, or events created by a connected app or shown through another calendar. The controls are different: invitation settings limit which new invitations are added automatically; reporting removes an eligible event; blocking targets a particular organizer; and app permissions address future calendar changes made by an app.
As an Amazon Associate I earn from qualifying purchases.
| What you are seeing | Use this control | What it does |
|---|---|---|
| Unknown invitations appear automatically | Only if the sender is known | Automatically adds invitations from contacts, people in your organization, and people you have interacted with; other invitations arrive by email instead. |
| You want to review every invitation before it is added | When I respond to the invitation in email | Waits until you respond to the invitation email before adding the event. |
| An unwanted event sent from Google Calendar is already present | Report as spam | Removes the event; reporting a recurring event removes its series. |
| The same organizer keeps sending invitations | Block the organizer | Stops their future invitations from appearing, with separate limitations for existing events and calendar access. |
| An app appears to be creating calendar items | Review the app’s calendar permission | Can prevent further app changes after access is revoked; it does not erase events the app already created. |
The sections below explain how to apply each option and what it will—and will not—change.
A quick way to diagnose the right fix
Start by separating the item you see from the way it got there. If it is a new invitation and the sender is unfamiliar, change the invitation rule. If an unwanted Google Calendar event is already present, report it. If one person repeatedly sends the invitations, block that organizer. If entries appear to be made by an app or belong to another provider’s calendar, address that app or calendar rather than expecting Google’s spam-report action to work on it.
#1 Best Overall
- [Ultra-Lightweight Ear Buds Designed for Small Ears] Each earbud weighs only 3.7g and features a compact, ergonomic in-ear design made especially for small ears. Secure, low-profile, and comfortable for workouts, all-day wear or overnight sleeping.The ultra-slim profile sits flush in your ear with no hard edges poking or rubbing, so you can even sleep on your side without discomfort.
- [Immersive Stereo Sound with TOZO OrigX Technology] TOZO OrigX tuning delivers clear vocals, balanced mids, and natural stereo sound for music, podcasts, and videos.
- [Long Battery Life for Daily Use] Get up to 7 hours of playtime on a single charge, with up to 32 hours total using the charging case—ideal for workdays, commuting, and extended listening sessions.
- [Bluetooth 5.3 & Stable Connection] Bluetooth 5.3 provides fast pairing, stable wireless performance, and reduced dropouts as you move around home or office.
- [Deep Bass with Clear Vocals] High-performance drivers produce punchy bass while keeping vocals clean and detailed for everyday listening.
This distinction matters because these controls do not substitute for one another. Changing the invitation rule does not clean up invitations already on the calendar. Reporting an eligible event does not block every future message from its organizer. Blocking a person does not delete existing events or revoke calendar-sharing access. Revoking an app permission does not remove items the app already created. If spam continues after one fix, identify whether it is a new invitation, an existing event, a shared calendar, or an app-created item before applying another control.
Stop unknown invitations from being added automatically
Set the invitation rule on a computer
- Open Google Calendar’s invitation settings and sign in to the account receiving the invitations.
- In Calendar, select Settings.
- Under General, choose Event settings.
- Find Add invitations to my calendar and select Only if the sender is known or When I respond to the invitation in email.
Choose Only if the sender is known if you want invitations from familiar people to continue appearing without an extra approval step. Google treats a sender as known if they are in your contacts, belong to your organization, or are someone you have interacted with. Invitations from other senders are not automatically added; Google says you receive an invitation email instead.
If you want to decide about each invitation, use When I respond to the invitation in email. The event is added only after you respond to its email notification. This is more restrictive, but it also means an invitation you intend to accept will not be on your calendar until you take that action.
Compare the two invitation choices
The known-sender option is a middle ground: familiar invitations can still be added automatically, while invitations from other senders are delivered by email rather than placed on the calendar automatically. It relies on Google’s definition of a known sender, not solely on whether you personally recognize the name at a glance. Contacts, people in your organization, and people you have interacted with qualify.
The email-response option is stricter. It makes your response to the invitation email the step that causes the event to be added, so it is useful when you would rather review invitations before they appear as calendar events. The trade-off is an extra action for invitations you want to accept. Neither choice is a way to remove an event that is already present; use the event’s own removal or reporting route for that.
There is also a privacy consideration with the known-sender rule: Google says that choosing it may reveal to senders that they are not in your contacts. Weigh that disclosure against the convenience of continuing to add known invitations automatically. If a previously unfamiliar sender becomes known because you mark them known or interact with them, future invitations from that sender can then be added automatically under this rule.
What changes after you choose a rule
- The settings apply to new invitations; they are not a cleanup tool for events that are already on the calendar.
- With Only if the sender is known, a sender who is not known to Google may be able to tell that you are not in their contacts. Consider that privacy trade-off before enabling the option.
- If you receive an invitation by email because its sender is not known, marking the sender known or interacting with them can mean future invitations from that sender are added automatically.
- On a work or school account, an administrator may control which invitation options are available. If you cannot select the setting you want, ask your account administrator whether it is restricted.
Because the rule is account-specific in practice, make sure you are changing the Google account that is receiving the invitations. If you use more than one account, a setting changed in one account does not explain or resolve invitations arriving in another. If the intended option is missing on a work or school account, the administrator may determine which invitation settings you can use; switching repeatedly between choices will not override that restriction.
Rank #2
- 【IP68 Waterproof Multifunctinal Smart Watch】Torjalph fitness activity tracker smart watch is IP68 waterproof technology ,you can wear it when swimming,handwashing,it's rain-proof which means that you perform multiple exercise modes outside without worrying about sweat or rain corroding your fitness smart watch,and this watch equipped with a 230 mAh large capacity battery magnetic charging ,and this sports activity tracker watch can be used 5-7 days If fully charged.
- 【Larger 1.83'' Full Screen Watch & Multi-dial Selection】1.83 inch full HD color touch screen smart watch for men / women provides excellent 240*284 resolution image quality ,This Bluetooth smart watch offers a better touch experience and remarkable immersion and ,more than 200 watch faces for you to choose from App"Da Fit ", you can change the dial style according to your mood to wear keeping the world on your wrist
- 【Accurate Activity Tracker Smart Watch 】sports watch activity tracker uses sweat and dust resistant breathable silicone strap, our Fitness Tracker Smart Watch for Android iOS Phones supports 12 sports modes,walking,running,bicycle,swimming,badminton,basketball,football,rope skipping. This bluetooth calls smart watch for men women is lightweight and stylish, bringing more convenient and relaxing sports experience while also providing more protection.
- 【Your 24 Hour Personal Daily Health Monitor】Fitness watch for women men full touch screen IP67 waterproof bluetooth smartwatch for Android iOS Phones with heart rate blood pressure monitor multifunction Andriod smart watch with steps counter sleep monitor sports fitness watch, monitoring blood oxygen saturation allows you to understand your physical condition in real time to track fitness progress ,to know your health status in time.
- 【More Functions Bluetooth Call Smart Watch】This fitness activity smart watch full screen for iPhone and Android phones includes a bunch of new features including:The bluetooth smart watch can hang up the phone, receive and display WhatsAPP /Text /Facebook /Twitter /Messenger reminder.Support sedentary reminder, alarm clock, stopwatch, timer,weather information,music control, remote camera control compatible with Android 5.0 and above or iOS 9.0 and above smartphones.
Invitation settings on iPhone or iPad
Google also documents invitation management for iPhone and iPad in its iOS invitation settings help. The available choice is account- and administrator-dependent. If the setting is not available in the app, use Calendar on a computer or check whether your work or school administrator controls it.
Remove a suspicious event that is already on the calendar
For an event sent from Google Calendar, use its spam-reporting action rather than relying only on deleting it. Open the event and choose More actions → Report as spam. Google says the event is removed from your calendar. If the event is recurring, reporting it removes all events in that series.
This route is limited to events sent from Google Calendar. An event created through another provider, app, or service cannot be reported through this Google Calendar spam-report flow. If the action is unavailable, first consider whether the event came from another source; use that source’s controls or remove the event or calendar through the relevant settings instead.
Reporting is the direct option for an eligible event already on your calendar; it is distinct from changing how future invitations are handled. If the suspicious event is part of a recurring Google Calendar invitation, the removal applies to the whole series, not just one occurrence. That makes it important to distinguish an eligible Google Calendar event from an item supplied by another calendar or service before choosing this action.
Google’s instructions for eligibility and removal are in Report inappropriate calendar invitations & events.
Block an organizer who keeps sending invitations
Block the person from an event on a computer
- Open an event from the organizer in Google Calendar on a computer.
- Choose More options.
- Select Block [name] and confirm.
Blocking prevents future invitations from that organizer from appearing on your calendar. It is the targeted option when the problem is one repeat sender rather than unknown invitations in general. Google explains the behavior in Block someone in Google Calendar.
Blocking is different from choosing a stricter invitation rule. Use the invitation rule when you want to limit unknown senders generally; use organizer blocking when you want to stop future invitations from a particular person. Blocking affects future invitations, but it does not automatically clear the organizer’s existing events or change who has permission to view a calendar you shared earlier.
Rank #3
- [Low Noise High Fidelity] New bee guitar cord with 22AWG oxygen-free-copper center conductors provides enhanced signal transfer, the PVC insulation material and the high-density stranded copper double shield provide noise rejection for quiet operation
- [Ideal for Choice] New bee 1/4 straight and right angle metal connectors, ensures a secure connection in any instrument, pedal, or amp jack. L shape great fro on stage guitar stands
- [Wide Compatible] Suitable for mixer, power amplifier, microphone, effector, decoder, equalizer, electoronic organ, electric guitar, electric bass and other electronic equipments. Widely used in the installation of smart home, karaoke speaker, professional stage audio, etc
- [Easy Disassemble] Making incidental repairs quick and easy! Very nice, flexible cable
- [Dont Hesite to Order] 24 hours customer services and professional technology team are standing by
Understand what blocking leaves in place
- Invitations already on the calendar remain unless you delete them yourself.
- Blocking does not revoke calendar-sharing access that you previously granted to the person. If they can still access a calendar, review its sharing settings and remove their permission there.
- Updates to earlier events may still produce Gmail notifications. Google advises blocking the sender’s email address in Gmail if you want to stop those notifications.
- If you later unblock the organizer, previously blocked events do not return. The organizer would need to send new invitations.
- You cannot block someone from a secondary calendar you subscribe to. Unsubscribe from that calendar if you want to stop seeing its invitations.
These limits are easy to mistake for a failed block. If an old invitation remains, remove it separately; the block is intended to prevent future invitations, not to erase the existing ones. If the person still has access to your calendar, change its sharing permissions as a separate step. And if Gmail continues to alert you about updates to earlier events, Google’s recommendation is to block the sender’s email address in Gmail as well.
Windows Errors? Fix Them Before They Spread
Repair common Windows errors and clear accumulated junk for a smoother, more stable PC - no reinstall needed.Free scan · no reinstallCrashes, No Sound, or Screen Glitches?
Random freezes, missing sound and display glitches usually trace back to one bad driver. Find and replace yours safely.Free scan · under a minuteUnblocking is not a way to restore events that were blocked. If you unblock someone and want an event from them again, the organizer must send a new invitation. For invitations arriving through a secondary calendar you subscribe to, blocking that person is not available; unsubscribing from the calendar is the relevant way to stop seeing its invitations.
Check whether an Android app is adding calendar spam
If suspicious entries seem to come from an app rather than an invitation, review which apps can change calendar data. On Android, the documented path is Settings → Security & privacy → Privacy controls → Permission manager → Calendar. Review the apps listed there and change calendar access for any app you do not want to be able to modify your calendar.
Android menu names and paths can vary by phone. If those labels differ, look in your device’s privacy or permission settings for the Calendar permission and review the apps with access.
This check is most relevant when the entries appear to be created by an app rather than arriving as invitations from an organizer. Review the apps with Calendar permission and decide whether each one should retain access. If you revoke access from an app you do not want changing calendar data, that change addresses future app access; it is not a cleanup action for the calendar items already made.
Permission changes do not clean up existing entries
Revoking an app’s calendar permission does not remove events it created earlier. If the entries remain, remove them separately from the calendar or account where they appear. Hiding a calendar can take it out of view, but hiding is not the same as preventing the app from creating new spam calendars: Google identifies removing app access as the step to stop future app-created calendars.
Think of hiding as a visibility choice and permission revocation as an access choice. Hiding an unwanted calendar can make its events disappear from your view, but it does not stop the app from creating new spam calendars. Revoking permission is the step to prevent future app-created changes, while existing entries still need separate cleanup. If the calendar is supplied by a service you still use, consider whether you want to keep that app’s calendar access before revoking it.
Rank #4
- Digital Family Calendar: BSIMB digital calendar wall touch screen puts an end to your chaotic life. Designed for busy families, the digital calendar keeps you organised and in step with your family. Assign different colours and tasks to each family member to make family scheduling easier and more intuitive.
- Easy Setup and Auto-Sync: Plug in, connect to WLAN and auto-syn your electric calendar in minutes. Digital wall calendar compatible with Google calendar, iCloud calendar, Outlook calendar, Cozi calendar and Yahoo calendar. Add events directly on the device or through the ecalendar app. Electronic calendar stays current whether you're at work or traveling—no manual updates needed.
- All-In-One Home Assistant: Smart calendar builds habits and encourage independence with personalised chores. Display daily meal plan to reduce the daily ‘What's for dinner?’ stress. To-do lists keep track of everything you want. Turning chores into valuable achievements with stars and rewards, making life easier and more enjoyable.
- Manage Anytime Anywhere: BSIMB electronic calendar for family stay connected with the powerful ecalendar app. Access and manage your digital wall calendar anytime, anywhere with free features like stars & rewards, photo screensaver, chore charts, meals plans, to-do lists etc. Electronic planner paid features like Magic Import tailor advanced tools for users with special needs.
- Stay in Touch with Loved Ones: Share photos or videos from your phone to electronic wall calendar with app, instantly update your life moment, and keep in touch with your family, especially those who are far away; you can also surprise your smart calendar digital wall by sending him a wish card; it's also great for keeping tech-illiterate elders in touch with the youngsters.
For the Android permission and calendar-visibility guidance, see Google’s Block calendar spam on Android.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.When the entries come from another calendar provider
Not every item shown in Google Calendar was created by Google Calendar or by an Android app with calendar permission. If you use Calendar while signed in with another provider or connected service, that service may have its own event and spam controls. Google’s Android guidance points users to the provider’s help center for those controls. Check where the calendar or event originates before trying Google’s Report as spam action, which is only for events sent from Google Calendar.
Recommended Free Tools
If an unwanted calendar is simply visible in your list, hiding it can remove its events from view. If the calendar belongs to an app that is creating new calendars, review and remove the app’s calendar access as described above. If it is a secondary calendar you subscribe to and a particular person is sending invitations through it, Google’s organizer-block feature is not available for that calendar; unsubscribing is the available way to stop seeing its invitations.
For a connected provider such as Calendly or Asana, Google recommends consulting that provider’s help center for its spam controls. The practical first question is not just whether an event appears in Google Calendar, but which service or calendar supplied it. Google’s report action has a defined eligibility limit, and organizer blocking also has a limit for secondary calendars you subscribe to. Choosing the source-specific control avoids treating every item displayed in Calendar as a Google Calendar invitation.
Troubleshoot when spam continues
New invitations still appear automatically
- Check that the invitation rule was changed on the account that receives the invitations, not a different Google account.
- Confirm that you selected the intended option under Settings → General → Event settings → Add invitations to my calendar.
- Remember that invitations from people in your contacts, your organization, or people you have interacted with qualify as known under the first option.
- If this is a work or school account and the option is missing or unavailable, an administrator may control it.
If you selected Only if the sender is known, an invitation from a sender Google considers known can still be added automatically; that is how the option is designed to work. An invitation from someone not considered known should instead arrive by email. If you want the invitation added only after you act, choose the email-response setting, provided it is available for your account.
The event remains after you reported or blocked it
- Spam reporting applies only to events sent from Google Calendar. For another provider’s event, use the provider’s controls or remove it through the source calendar.
- Blocking an organizer affects future invitations, not invitations already on your calendar. Delete existing items separately if you do not want to see them.
- If you reported one occurrence of a recurring Google Calendar event, Google says the series is removed; if it was not a Google Calendar event, that reporting behavior does not apply.
Use the event’s origin to choose between these cases. An unavailable Report as spam action does not mean the reporting feature can remove an event from every provider; the Google help page limits the action to events sent from Google Calendar. Similarly, a successful block should not be expected to remove earlier invitations. Clean up the existing event or source calendar separately.
Do these 3 things before closing this tab:
1Fix the driver behind crashes, sound loss and screen glitches2Repair Windows errors before they cause bigger problems3Scan for outdated or missing drivers - takes under a minuteEvents return or notifications continue
- If events are being newly created by an app, hiding the calendar only changes what is displayed. Review and revoke the app’s calendar permission to stop future app changes.
- If updates to old events continue sending Gmail notifications after an organizer is blocked, block the sender’s email address in Gmail as well.
- If a person still has access to a shared calendar, blocking invitations does not remove that access. Change the calendar’s sharing permissions separately.
When the problem persists, match the remaining symptom to the control’s scope: new unknown invitations point to invitation settings; an eligible existing invitation points to spam reporting; future invitations from one organizer point to blocking; new app-created items point to app permission; and invitations on a subscribed secondary calendar point to unsubscribing from that calendar. Gmail notifications about updates to earlier events and calendar-sharing access require their own separate changes.
These controls solve different parts of the problem: invitation settings govern future unknown invitations, spam reporting handles eligible existing events, organizer blocking stops future invitations from a repeat sender, and permission or source-calendar changes address events created elsewhere.
Frequently Asked Questions
Will changing the invitation setting remove calendar spam that is already there?
No. Google’s invitation settings apply to new invitations. For an eligible existing event sent from Google Calendar, open it and choose More actions → Report as spam; otherwise use the source calendar or service’s controls.
What does Google mean by a known sender?
Google treats someone as known if they are in your contacts, belong to your organization, or are someone you have interacted with. With Only if the sender is known, invitations from other senders are sent by email instead of being added automatically.
The Tool Desk
Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →Outbyte Driver Updater FREEScan for outdated or missing drivers - takes under a minuteDriver Scan →Does reporting one occurrence of a recurring event remove the whole series?
Yes, if it is an event sent from Google Calendar. Google says reporting the event as spam removes it, and reporting a recurring event removes all events in the series. The reporting flow does not apply to events created by another provider, app, or service.
If I block an organizer, will their existing invitations disappear?
No. Blocking prevents future invitations from that organizer, but invitations already on your calendar remain unless you delete them. Blocking also does not revoke calendar-sharing access you previously granted.
Why am I still getting Gmail notifications after blocking someone in Calendar?
Updates to earlier events may still trigger Gmail notifications after the organizer is blocked. Google advises blocking the sender’s email address in Gmail to stop those notifications.
Will revoking an app’s calendar permission delete events it already created?
No. Revoking permission addresses future app access, but items already created remain and must be removed separately. Hiding a calendar only changes whether it is shown; it is not the step Google identifies for preventing an app from creating new spam calendars.
Quick wins for a faster PC:
Scan for outdated or missing drivers - takes under a minuteDriver Scan →Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →Can I block someone who sends invitations through a calendar I subscribe to?
Google says you cannot block someone from a secondary calendar you subscribe to. Unsubscribe from that calendar to stop seeing its invitations.
What if my work or school account does not show the invitation setting I want?
An administrator may control which invitation settings are available. Ask your administrator whether the setting is restricted.
The Bottom Line
Use the control that matches how the unwanted item arrived. Set Only if the sender is known to screen new invitations, or choose When I respond to the invitation in email for stricter review. Report eligible existing Google Calendar events, block repeat organizers for future invitations, and review Android app permissions or the source provider for items created elsewhere. Each fix has limits: existing events, shared access, Gmail notifications, and app-created items may need separate action.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
Free tools Windows power users keep installed
One-click scans. No signup required.
