Saturn
Free social calendar app built around school schedules and friends
What is Saturn?
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.
Saturn is free to use. See every plan
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.
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.
Saturn pricing
- Starts at
- 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 apps.apple.com on Oct 9, 2026. Prices change, so confirm with Saturn before you buy.
How people rate the Saturn app
4.7
out of 5 for the iPhone and iPad app
- 5 stars85%
- 4 stars8%
- 3 stars2%
- 2 stars<1%
- 1 star4%
67,845 ratings on the App Store in the United States, read Oct 9, 2026. It rates the app, not everything the product does. See the listing
Works with
- Google Calendar
- Snapchat
Saturn alternatives
- Saturn vs Howbout
Free plan · from $3.99/mo
- Saturn vs TimeTree
Free plan · from $4.49/mo
- Saturn vs GroupCal
Free plan · from $10/mo
- Saturn vs Google Calendar
Free plan · from $7/mo
Common questions
Is Saturn free?
Yes. Saturn is free to use. 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.
How much does Saturn cost?
Saturn lists one plan. Saturn Calendar: $0. Prices were read from apps.apple.com on Oct 9, 2026.
What platforms does Saturn work on?
Saturn is available on iOS and Android.
How is Saturn rated?
Saturn's iPhone and iPad app averages 4.7 out of 5 from 67,845 ratings on the App Store in the United States, as read on Oct 9, 2026. That is the store's rating of the app, not a score from us.
Does Saturn have a Windows app?
No Windows app was listed when its pages were read on Oct 9, 2026. Saturn is listed for iOS and Android.
Does Saturn have a macOS app?
No macOS app was listed when its pages were read on Oct 9, 2026. Saturn is listed for iOS and Android.
Is Saturn open source?
Saturn is not described as open source on its own site, as read on Oct 9, 2026.
What does Saturn integrate with?
Saturn's listing names Google Calendar and Snapchat. A listing names up to eight integrations, so it may connect to more.
Who makes Saturn?
Saturn is made by Saturn Technologies Inc.
What are the alternatives to Saturn?
The closest alternatives to Saturn in our directory are Howbout, TimeTree, GroupCal, Google Calendar and Apple Calendar. Each one has a side-by-side comparison with Saturn.
Sources for this page
The prices, plans, platforms and features above were read from these pages on Oct 9, 2026. What people say is linked where it appears.