# Saturn

> Free social calendar app built around school schedules and friends

Saturn is a free calendar app for iPhone and Android from Saturn Technologies Inc. It started as a calendar for high school students and sets up rotating periods, block schedules and A/B days from a school's format; its store listings now also describe it as a calendar for friends and family. Users compare calendars to see when friends are free, create shared calendars for groups, connect Google Calendar and add events by typing or saying a phrase.

- **Category:** Calendar & Scheduling
- **Made by:** Saturn Technologies Inc.
- **Website:** https://www.joinsaturn.com/
- **Runs on:** iOS, Android
- **Facts last checked:** Oct 9, 2026

## Pricing

Saturn is free to use.

- **Pricing model:** Free
- **Free plan:** Free on the App Store and Google Play. The US App Store listing shows no in-app purchases, and the vendor's site lists no paid plan.
- **Free trial:** None listed.

| Plan | Price | What you get |
| --- | --- | --- |
| Saturn Calendar | $0 | The complete app for iPhone, iPad, Apple Watch and Android, listed as free with no in-app purchases on the US App Store. |

Read from https://apps.apple.com/us/app/saturn-calendar/id1454483188 on Oct 9, 2026. Prices change, so confirm with Saturn before buying.

## Key features

- **School schedule formats:** Handles rotating periods, block schedules, A/B days, lunch waves, advisory and flex blocks. The listing says Saturn is in over 20,000 US high schools and can be carried on to college.
- **Compare calendars with friends:** Shows when friends and family are free without needing their email address, so overlapping free time can be turned into a plan. Friends appear alongside your own calendar on the home tab.
- **Shared and group calendars:** A shared calendar can be made for a trip, a household, a club or a team and joined through a link. Members get change and reminder notifications as events are updated.
- **Typed or spoken event entry:** Typing or saying a phrase such as "Dinner with Dylan on Tuesday at 7" puts the event on the calendar. Events, to-dos and reminders can all be added by text or voice.
- **Google Calendar and Snapchat:** Google Calendar can be connected so its events appear in Saturn. Connecting Snapchat brings in friends, birthdays and Bitmojis.
- **Apple Watch app and widgets:** The Apple Watch app shows a countdown to the end of the current class or event, a schedule view of the day and watch face widgets, synced from the iPhone app.

## Good for

- High school students with rotating, block or A/B day schedules
- Friends who want to see when each other are free without swapping emails
- Clubs and teams that need a shared calendar members join by link

## Worth knowing

- Mobile apps only: iPhone, iPad, Apple Watch and Android. No web or desktop version is listed.
- The website still presents Saturn as the calendar built for high school, and the terms limit each school community to students of that school.
- Google Calendar is the only outside calendar the store listings name as a connection.
- The terms of use require users to be at least 13 years old.

## What people say

- **App Store rating of the iPhone and iPad app:** 4.7 out of 5 from 67,845 ratings in the United States, read Oct 9, 2026. This is the store's rating of the app, not a score from ToolGPA. Source: https://apps.apple.com/us/app/id1454483188

## Works with

Google Calendar, Snapchat

**Tags:** Calendar, Tasks, Natural-language input

## Alternatives

- [Howbout](https://toolgpa.com/tools/howbout): Shared calendar app that shows when friends and family are free. [Compare](https://toolgpa.com/compare/howbout-vs-saturn)
- [TimeTree](https://toolgpa.com/tools/timetree): Shared calendar app for families, couples and groups. [Compare](https://toolgpa.com/compare/saturn-vs-timetree)
- [GroupCal](https://toolgpa.com/tools/groupcal): Shared calendars for groups, teams and public audiences. [Compare](https://toolgpa.com/compare/groupcal-vs-saturn)
- [Google Calendar](https://toolgpa.com/tools/google-calendar): Online calendar from Google, free with a personal account. [Compare](https://toolgpa.com/compare/google-calendar-vs-saturn)
- [Apple Calendar](https://toolgpa.com/tools/apple-calendar): Free built-in calendar for iPhone, iPad, Mac and iCloud.com. [Compare](https://toolgpa.com/compare/apple-calendar-vs-saturn)

## Sources

The prices, plans, platforms and features above were read from these pages on Oct 9, 2026:

- https://www.joinsaturn.com/
- https://www.joinsaturn.com/updates
- https://www.joinsaturn.com/safety-center
- https://www.joinsaturn.com/safety-center/parents
- https://www.joinsaturn.com/terms-of-use
- https://www.joinsaturn.com/not-student
- https://apps.apple.com/us/app/saturn-calendar/id1454483188
- https://play.google.com/store/apps/details?id=com.joinsaturn.android1&hl=en_US&gl=US

Page: https://toolgpa.com/tools/saturn
Listed by ToolGPA (toolgpa.com).