The Saturn Insider’s Guide
Everything we know about Saturn in one document: what it costs, its grades, getting a refund, getting help and what else to look at. Read it here, or keep a copy.
Saturn
The Insider’s Guide
Free social calendar app built around school schedules and friends
Every plan, grade, refund rule and rival among calendar and scheduling apps, read from Saturn’s own pages.
Made by Saturn Technologies Inc. · checked Oct 9, 2026 · toolgpa.com
Contents
- 01WelcomeWhat it is, who it suits, its grades and the ten things to know first
- 02What it costsEvery plan, the free plan, ways to pay less and how prices have moved
- 03What it doesIts main features, where it runs, what it works with and who makes it
- 04Where it standsIts grades against its category, and whether to keep it or make your own
- 05The alternativesThe tools it is most often weighed against, side by side
- 06Quick answersThe questions people ask about it, each answered in a line or two
- 07About ToolGPAWho made this guide, what else is on the site, and how to cite it
ToolGPA put this guide together from Saturn’s own pages, its app-store listings and our grades. Every fact in it is on Saturn’s page too, where it is kept up to date. Checked Oct 9, 2026.
Part 01 · Overview
Welcome
What it is, who it suits, its grades and the ten things to know first
3.0
GPA, above 57 of the 74 other calendar and scheduling apps we grade
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.
To get you started, here are 8 things to know about Saturn, taken from its own pages and our grades.
It costs nothing, with no in-app purchases on the US App Store.
- 1
Best for high school timetables shared with friends
Saturn is a phone calendar built for high school: rotating periods, block schedules, A/B days, and a view of when your friends are free.
- 2
It is free
Saturn has no paid plan at all. 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.
- 3
It runs on 2 platforms
iOS and Android.
- 4
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.
- 5
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.
- 6
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.
- 7
A 3.0 GPA, above 57 of 74
That is against the other calendar and scheduling apps we grade, on value, the free plan, features, ease of use and platforms.
- 8
Keep it
Saturn is free, so making your own would save you nothing.
Saturn at a glance
- Pricing
- Free
- Free plan
- Yes
- Free trial
- None stated
- Runs on
- iOS, Android
- Made by
- Saturn Technologies Inc.
- Category
- Calendar & Scheduling
- Our grade
- 3.0 GPA, very good
- Store rating
- 4.7 on the App Store, 67,845 ratings
The report card
Best for high school timetables shared with friends
Saturn is a phone calendar built for high school: rotating periods, block schedules, A/B days, and a view of when your friends are free. It costs nothing, with no in-app purchases on the US App Store. But it's phones only with no web or desktop version, Google Calendar is the only outside calendar it names, and you have to be 13 or older to use it.
| Subject | Grade | Comment |
|---|---|---|
| Value for money | A | Free, with no paid plan on Saturn's site and no in-app purchases on the US App Store, in a category where paid calendar tools start around $6 a month. |
| Free plan and trial | A | The complete app is free on iPhone, iPad, Apple Watch and Android, with no trial and no paid tier on record. |
| Features | C | Rotating periods, block schedules, A/B days, lunch waves, comparing calendars with friends, shared calendars by link, events typed or spoken. It does the school-timetable job fully, but that's a smaller job than a calendar app's: Google Calendar is the only outside calendar named, and there's no desktop version. |
| Ease of use | B | 4.69 from about 68,000 App Store ratings, which is just under our bar for an A. Type or say "Dinner with Dylan on Tuesday at 7" and it's on the calendar, and shared calendars are joined through a link. |
| Platforms and integrations | C | iPhone, iPad, Apple Watch and Android, with Google Calendar and Snapchat to connect. That's phones only, really. No web or desktop version is listed, and there's no API on record. |
An A is worth 4 points, a B 3, a C 2, a D 1 and an F nothing. The GPA is the average of the five.
Who Saturn is for
- Fits if you're in high school with rotating periods, block schedules or A/B days
- Works for school clubs and teams that want a shared calendar members join by link
Who it is not for
- Skip it if you want your calendar on a laptop, as there's no web or desktop version
- Not for you if your events live outside Google Calendar, the only outside calendar named as a connection
- Not for you if you're under 13, which the terms of use don't allow
- Too light for life after school: the site still pitches it at high schoolers, and school communities are for that school's students only
Good to know
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.
Part 02 · Pricing
What it costs
Every plan, the free plan, ways to pay less and how prices have moved
Free
No paid plan at all
Saturn is free to use.
The complete app is free on iPhone, iPad, Apple Watch and Android, with no trial and no paid tier on record.
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.
The 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.
Read from apps.apple.com on Oct 9, 2026.
Part 03 · Features
What it does
Its main features, where it runs, what it works with and who makes it
2
Places it runs: iOS and Android
Free social calendar app built around school schedules and friends. Here is what it does, as its own site describes it, and what it covers: tasks, natural-language input, calendar.
iPhone, iPad, Apple Watch and Android, with Google Calendar and Snapchat to connect.
- 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.
Where it runs
- iOS
- Android
What it works with
- Google Calendar
- Snapchat
Saturn is made by Saturn Technologies Inc.
Part 04 · Standing
Where it stands
Its grades against its category, and whether to keep it or make your own
57/74
Other calendar and scheduling apps it is graded above
Saturn's GPA of 3.0 is higher than 57 of the 74 other calendar and scheduling apps we grade, and level with 8.
It stands best on free plan and trial (A, above 56 of 74) and worst on features (C, above 3).
Saturn has no paid plan.
On features, ease of use and platforms it scores 2.3 out of 4. Nothing scores higher for less, though at least one tool matches that score at a lower price.
Each grade against the category
Every bar is all 75 calendar and scheduling apps we grade, cut by the letter each got. Saturn’s own letter is outlined.
- AValue for moneyAbove 45 of 74
- AFree plan and trialAbove 56 of 74
- CFeaturesAbove 3 of 74
- BEase of useAbove 32 of 74
- CPlatforms and integrationsAbove 10 of 74
Price against what you get
Each dot is one of 67 calendar and scheduling apps. Further left costs less; higher up scores better on features, ease of use and platforms. Saturn is the marked dot.
What paid plans start at, a month (each step along is roughly double) →
Keep it, or make your own?
Whether this is something you could build for yourself with an AI app builder, and what you would give up.
Keep it
Saturn is free, so making your own would save you nothing.
And it is not the kind of software a weekend replaces. It is one of the better ones too: its GPA of 3.0 is higher than 57 of the 74 other calendar and scheduling apps we grade.
What you could make
- Calendar, tasks and natural-language input: an app builder makes these well.
What you could not
- A real app for iOS and Android. Something home-made would be a web page.
- Hooks into the device itself: an Apple Watch app and widgets.
- Sharing with other people, which means accounts and invitations.
What this rests on. Saturn’s listing: what it does, where it runs, what it plugs into and what it costs. It is a judgement about the kind of software this is. We have not built a replacement for it, and making your own means looking after it too. How we decide, and every tool’s verdict.
Part 05 · Alternatives
The alternatives
The tools it is most often weighed against, side by side
Howbout, TimeTree, GroupCal, Google Calendar and Apple Calendar
The 5 tools Saturn is most often weighed against, with where each one differs from it.
- 3.2GPA
Howbout
Free plan · from $3.99/mo
Shared calendar app that shows when friends and family are free.
- Saturn also covers tasks and natural-language input.
- Howbout also covers surveys.
- 3.2GPA
TimeTree
Free plan · from $4.49/mo
Shared calendar app for families, couples and groups.
- Only TimeTree lists a web app.
- Saturn also covers natural-language input.
- TimeTree also covers notes.
- 2.8GPA
GroupCal
Free plan · from $10/mo
Shared calendars for groups, teams and public audiences.
- Only GroupCal lists a web app.
- Saturn also covers tasks and natural-language input.
- 3.4GPA
Google Calendar
Free plan · from $7/mo
Online calendar from Google, free with a personal account.
- Only Google Calendar lists a web app.
- Saturn also covers natural-language input.
- Google Calendar also covers booking links.
- 3.2GPA
Apple Calendar
Free
Free built-in calendar for iPhone, iPad, Mac and iCloud.com.
- Only Saturn lists an Android app.
- Only Apple Calendar lists a web app.
- Only Apple Calendar lists a macOS app.
Part 06 · Questions
Quick answers
The questions people ask about it, each answered in a line or two
13
Questions, each answered in a line or two
The short version of everything above, for when you only need the answer. Each one is told in full in its part of the guide.
Is Saturn free?
Yes. Saturn is free to use.
How much does Saturn cost?
Saturn lists one plan. Saturn Calendar: $0.
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.
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.
How does Saturn compare with other calendar and scheduling apps?
Saturn's GPA of 3.0 is higher than 57 of the 74 other calendar and scheduling apps we grade, and level with 8.
Is Saturn good value for money?
ToolGPA grades Saturn A for value for money. Saturn has no paid plan.
Could I make my own version of Saturn?
Saturn is free, so making your own would save you nothing. And it is not the kind of software a weekend replaces.
Where this guide comes from
The prices, plans, platforms and features were read from Saturn’s own pages on Oct 9, 2026, and the grades were given on Oct 10, 2026. Graded from this listing, whose facts were read from Saturn's own pages on 9 October 2026, and its App Store rating. Also tested with a demo account on 2026-04-02.
Every tool we list gets five grades, A to F, each with its reason, and a GPA that averages them. How each is decided is at toolgpa.com/grades. This guide is ToolGPA’s own work; it is not made, paid for or approved by Saturn Technologies Inc. Prices change, so check joinsaturn.com before you buy.
Part 07 · About
About ToolGPA
Who made this guide, what else is on the site, and how to cite it
3,189
Tools graded, in 94 categories
ToolGPA grades software the way a school report grades a pupil: five subjects, a letter for each with the reason written beside it, and a GPA that averages them. Prices, plans and platforms are read from each maker’s own pages and dated, so you always know how fresh a figure is.
Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Every tool on the site has a guide like this one, free to download and pass on. It all lives at toolgpa.com.
3,189
tools graded
94
categories
426
price changes on record
579
apps priced in 12 countries
What else is on toolgpa.com
- Saturn, kept up to dateEverything in this guide, with prices and grades as they are todaytoolgpa.com/tools/saturn
- How grades are givenThe rules behind every letter and every GPAtoolgpa.com/grades
- Value chartsWhat each tool costs against what it scores, for every categorytoolgpa.com/charts
- CompareAny two tools side by side, plan by plantoolgpa.com/compare
- Price changesEvery price rise and cut on record, each with its sourcetoolgpa.com/price-changes
- Prices by countryWhat apps cost on the App Store in 12 countriestoolgpa.com/prices-by-country
- Pay lessEvery public discount: yearly billing, students, nonprofitstoolgpa.com/save
- Keep or makeWhich tools are worth paying for, and which you could build yourselftoolgpa.com/keep-or-make
Scan for the live page
Prices and grades as they are today
Quoting this guide?
Please name ToolGPA and link to the live page, so readers can check the figures for themselves:
ToolGPA, "Saturn: The Insider's Guide", checked Oct 9, 2026. https://toolgpa.com/tools/saturn
Know someone choosing between calendar and scheduling apps?
Send them this guide: toolgpa.com/tools/saturn/guide
ToolGPA elsewhere: youtube.com/@toolgpa
See our other guides
The best-graded calendar and scheduling apps after Saturn, each with an Insider's Guide of its own.
- Calendar & Scheduling Insider's GuideEvery one of the 75 calendar and scheduling apps we grade, compared
- Notion Calendar Insider's GuideFree calendar app that connects to Notion databases3.6 GPA
- Google Calendar Insider's GuideOnline calendar from Google, free with a personal account3.4 GPA
- World Time Buddy Insider's GuideVisual time zone converter and world clock for planning calls3.4 GPA
Choosing software? Every tool graded, every price dated.
Compare tools at toolgpa.com ›Everything in this guide is ToolGPA’s own summary of what Saturn’s pages, its app-store listings and public reviews said on the dates shown. Grades are our judgement under the rules at toolgpa.com/grades. Every grade, review and ranking on ToolGPA is our own judgement. No company can pay for a grade or change one. Saturn is a trademark of its owner, and this guide is not made, paid for or approved by Saturn Technologies Inc. Prices and plans change: check joinsaturn.com before you buy.