Unibox
by Unibox
What Unibox is
Unibox is an email app from eightloops GmbH in Munich that organizes correspondence by sender. Incoming and outgoing messages for a contact appear together, while that contact’s attachments can be browsed in list or preview views. You can move or delete all messages from a contact, or select individual messages. Search covers names, email addresses, subject lines, message text and attachment filenames, but not words inside attached files. Unibox receives mail through IMAP and sends it through SMTP, supporting providers such as iCloud, Gmail, Outlook.com, Microsoft 365, Yahoo and configured private mail servers. Exchange requires IMAP and SMTP; Exchange ActiveSync, calendars and contacts are excluded. Connections run directly between your device and provider, with messages and attachments stored locally and credentials protected by Apple Keychain. It runs on iOS and macOS with a free plan for one email account.
Who it suits
Unibox suits people who want sender-based email organization on iOS or macOS. It also fits users of IMAP and SMTP mail providers who prefer local message storage.
What it does well
- Groups incoming and outgoing mail by sender
- Browses contact attachments in list or preview views
- Searches subjects, message text and attachment filenames
- Supports major IMAP and SMTP providers
- Free plan includes one email account
What to know first
- Does not search text inside attached files
- Exchange ActiveSync, calendars and contacts are excluded
- Account setup and drafts do not sync automatically
- iOS background notifications may be delayed
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Free | One email account | Free |
| Unibox Pro | Annual subscription; renews each year until canceled · Multiple email accounts · Custom default signatures | On request |
As uniboxapp.com lists them, read 12 Oct 2026. The maker's own page has the final word.
Verdict
Unibox focuses on grouping each contact’s email and attachments in one place. Its provider support and local handling are useful, but Exchange and cross-device synchronization have specific limits.
Facts from Unibox's own pages
- Attachments
- It groups a contact’s attachments in a browser with list and preview views. · uniboxapp.com, 12 Oct 2026
- Bulk actions
- Users can move or delete a contact’s messages together, or select individual messages. · uniboxapp.com, 12 Oct 2026
- Device sync limit
- Messages and status sync through the email provider, but account setup and drafts do not automatically sync between devices. · uniboxapp.com, 12 Oct 2026
- Email integrations
- Unibox uses IMAP to receive email and SMTP to send it, supporting providers including iCloud, Gmail, Outlook.com, Microsoft 365, Yahoo and suitably configured private mail servers. · uniboxapp.com, 12 Oct 2026
- Exchange limitation
- Exchange compatibility requires IMAP and SMTP; Exchange ActiveSync and Exchange calendars and contacts are not included. · uniboxapp.com, 12 Oct 2026
- Headquarters
- Munich, Germany · uniboxapp.com, 28 Sept 2026
- Local handling
- Email connections go directly from the device to the provider; messages and attachments are stored on the device, and credentials are protected by Apple Keychain. · uniboxapp.com, 12 Oct 2026
- Maker and location
- Unibox is developed by eightloops GmbH in Munich, Germany. · uniboxapp.com, 12 Oct 2026
- Notifications
- On iPhone and iPad, background email notifications may be delayed because iOS controls when apps can fetch new data. · uniboxapp.com, 12 Oct 2026
- Other services
- Optional Gravatar lookups send a SHA-256 hash of the sender’s email address, while optional domain-logo lookups send only the sender’s domain. · uniboxapp.com, 12 Oct 2026
- Privacy detail
- The maker says it does not access email contents, attachments, credentials or mailbox data during normal operation, with an exception for optional sender-domain logo lookups. · uniboxapp.com, 12 Oct 2026
- Search
- Search covers names, email addresses, subject lines, message text and attachment filenames, but not text inside attached files. · uniboxapp.com, 12 Oct 2026
- Support
- The maker directs users to email [email protected] for help and feature suggestions. · uniboxapp.com, 12 Oct 2026
- Unified inbox
- Yes · uniboxapp.com, 21 Sept 2026
- What it does
- Unibox groups received and sent emails by sender so messages to and from a contact appear together. · uniboxapp.com, 12 Oct 2026
Where Unibox stands on Freedom251
- Email clients#66 of 142