Helium

Free plan AndroidAPIiPhoneSelf-hostedWeb

What Helium is

Helium is a free planner for keeping classes, homework, grades, notes, and academic work organized. Its grade tools recalculate in real time, let students test hypothetical scores, and show what score on a final could meet a target grade. The schedule can be viewed by month, week, three days, day, or agenda, with color coding, filters, search, and drag-and-drop scheduling. Reminders for assignments, classes, exams, and events can arrive as push notifications on iOS, Android, and web, or by email. Helium syncs calendars in both directions with Google, Apple, other calendars, and iCal sources. Notes support headings, lists, quotes, links, search, printing, and links to classes or assignments. Helium is open source and provides a public REST API covering actions available in its apps, though it does not provide official integrations or tooling. Students can access, export, or delete their data, including exporting full schedules as JSON. The free plan is available on web, iOS, and Android, with API and self-hosted options listed.

Who it suits

Helium suits students from middle school through graduate school, as well as homeschool students. It may help learners who want schedules, grades, notes, and reminders together.

What it does well

Grade calculations include hypothetical scores and target-grade planning.
Five schedule views include search and drag-and-drop.
Two-way syncing supports Google, Apple, and iCal sources.
Full schedules can be exported as JSON.
Open-source code and a public REST API are available.

What to know first

Only one API token can be active per account.
No official integrations or pre-built tooling are maintained.
User data is stored and processed in the United States.

Limits

Helium is free for everyone. Only one API token can be active per account at a time; the service does not maintain official integrations or pre-built tooling.

Plans

Plan	Billed and limits	Price
Free	free for everyone	Free

As heliumedu.com lists them, read 1 Oct 2026. The maker's own page has the final word.

Getting started

Visit the Helium website or use its iOS, Android, or web app.
Organize classes, homework, assignments, and exams in the planner.
Add grades or hypothetical scores to calculate grade outcomes.
Sync a calendar such as Google, Apple, or an iCal source.
Set reminders for assignments, classes, exams, or events.

Verdict

Helium combines academic planning, grade calculations, calendar syncing, and notes in a free student planner. Its single-active-token limit and lack of maintained integrations are worth considering for API-based workflows.

Questions

Is Helium free?

Yes. Its Free plan is listed as free and free for everyone.

Which platforms support Helium?

Helium is available on web, iOS, Android, and through its API. Self-hosted is also listed as a platform.

Is Helium open source?

Yes. Helium says its code is publicly available on GitHub.

Does Helium integrate with calendars?

It supports two-way syncing with Google, Apple, and other calendars, including iCal sources.

Does Helium offer pre-built integrations?

It does not maintain official tooling or pre-built integrations, but its open API can be used to build integrations.

Where is Helium user data stored?

User data is stored and processed on servers in the United States.

Facts from Helium's own pages

API: Helium exposes a public REST API covering actions available in its iOS, Android, and web apps. · heliumedu.com, 1 Oct 2026
API token limit: Only one API token can be active per Helium account at a time. · heliumedu.com, 1 Oct 2026
Audience: Helium says it fits middle school, high school, college, university, graduate school, and homeschool students. · heliumedu.com, 1 Oct 2026
Calendar integration: It supports two-way calendar syncing with Google, Apple, and other calendars, including iCal sources. · heliumedu.com, 1 Oct 2026
Calendar sync: Yes · heliumedu.com, 20 Sept 2026
Data location: User data is stored and processed on servers in the United States. · heliumedu.com, 1 Oct 2026
Data portability: Users can access, export, or delete their data through the Services, and the homepage says full schedules can be exported as JSON. · heliumedu.com, 1 Oct 2026
Data privacy: Helium says it does not sell personal information and shares it only with service providers, legal authorities, business-transfer parties, and authorized personnel for stated purposes. · heliumedu.com, 1 Oct 2026
Free plan: Yes · heliumedu.com, 20 Sept 2026
Grade tools: It calculates grades in real time, supports hypothetical scores, and can calculate what is needed on a final to reach a target grade. · heliumedu.com, 1 Oct 2026
Integrations: Helium does not maintain official tooling or pre-built integrations, but its open API can be used to build integrations. · heliumedu.com, 1 Oct 2026
Notes: Notes support headings, lists, quotes, links, search, printing, and links to classes or assignments. · heliumedu.com, 1 Oct 2026
Open source: Helium is open source and says its code is publicly available on GitHub. · heliumedu.com, 1 Oct 2026
Purpose: Helium is a planner for organizing classes, homework, grades, notes, and academic workload. · heliumedu.com, 1 Oct 2026
Reminders: Helium sends native push notifications on iOS, Android, and web, or email reminders, for assignments, classes, exams, and events. · heliumedu.com, 1 Oct 2026
Scheduling: The planner provides Month, Week, 3-Day, Day, and Agenda views with color coding, filtering, search, and drag-and-drop scheduling. · heliumedu.com, 1 Oct 2026
Support: Helium provides a support portal with knowledge-base articles, FAQs, and a way to get in touch. · heliumedu.com, 1 Oct 2026

Where Helium stands on Freedom251

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