Comparison

Solar System Clock vs PlanetLoopTimer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Solar System Clock

Explore the time and positions of celestial bodies across our solar system. View analog and digital clocks for planets, dwarf planets, and moons, with interactive maps and customizable widgets. Understand planetary seasons and translate times between objects.

Highlights
  • Planet and moon time displays
  • Analog and digital clock formats
  • Interactive solar system map
  • Customizable widgets
  • Planetary season information
  • Time translation between celestial bodies
Features
Read full description

No AI was used in the making of this app, including code and visual assets. The app comes with the Earth and Mars clocks free of charge (including associated moons), and additional planet clocks can be purchased through the app or the App Store. The purchase also includes the new customisable widgets and the current and past positions of supported objects. Did you ever want to know the time on Saturn? The simple Solar System Clock can tell the time on any planet or dwarf planet, and the Sun in relation to Earth time. Calculated from the starting date of the Gregorian calendar, the app displays seconds, minutes, hours, days and years for each object based on orbit and rotation data. The time is given in both analog and digital formats and can be stopped and restarted for easy viewing, while keeping to the accurate localised time. A single analog clock face for all planets and dwarf planets is also included, and can be split into two clocks for main planets and dwarf planets. Times can be freely translated between planets, the Sun and moons. The app also provides the current and past positions of the planets, moons and dwarf planets to scale in the form of an interactive map, and the seasons on every planet and dwarf planet. A widget form of the Earth and Mars clocks is provided for circular widget slots on Apple Watch, and widgets on other supported devices can be customised within the app. An iMessage extension is also included to enable easy communication using the time systems. The main clock can also be projected as functional wall art.

About

PlanetLoopTimer

Features
Read full description

■ "Break, break, always break." gets things moving "Just a quick break"—and 30 minutes are gone. Open a comic, and the rest of the day is over. The harder you say "do it," the more they freeze. PlanetLoopTimer is a visual timer that turns the break itself into your child's "next motivation switch." Launch a planet, orbit the sun—the orbit is the break time. Pulled into the sun, it ends. "I want another shot, and a better one"—that feeling pulls the next small step out of them. ■ Not "5 minutes ticking by," but "you launch your own break" A normal timer starts counting down the second you press the button. For a kid, time is leaving without their say—it just feels unfair. That's why "just a little more!" never stops. In PlanetLoopTimer, the break length is decided by your launch. Eye the angle and power on the guide line, then release at the right moment. Launch well: longer orbit. Miss: much shorter. Because they made the time themselves, the end feels easier to accept too. ■ Planets, around the sun, round and round Each planet has a different break length. The farther from the sun, the longer it orbits. "It's far, so it goes longer"—that's intuitive for kids. As the target time gets closer, the sun's gravity slowly grows, and the planet spirals in. Watching a planet stay in orbit feels nothing like a forced 5-minute countdown. It's a timer, but it plays a bit like a game. That's how "fun breaks" are born. ■ Three easy steps ① Pick a planet The number on each planet on the start screen is the break time guide. ② Look at the guide line, and launch Picture the angle and power, then fire. A clean launch orbits long, a miss falls short— it's a timer, but you'll find yourself wanting to get better. ③ When it's pulled into the sun, the break ends The moment it's swallowed up, "what's next?" rises naturally. ■ Pluto only: ∞ Challenge mode Pluto has no rising-gravity setup. With a clean enough launch, it just keeps orbiting. Use it as a "personal record" treat for your kid. ■ A great fit for these kids and families [For kids who…] · "5 more minutes" stretches on forever · Open a comic or a game and can't put it down · Have a strong sense of their own pace · Move on "I want to try" more than on reasons · Love breaks, but can't quite catch the cue to end one · Have ADHD, ASD, or time blindness traits [For families where…] · "Do it!" has become a daily refrain · You want kids to move because they're convinced, not because they're told · Timers tend to turn into arguments · You'd like a fun mechanism for daily routines "Launch" instead of "scold." Change the word that moves them, and the day gets a little lighter. ■ About ads To avoid disturbing the timer, the main planet modes (Mercury through Neptune) show no ads at all. Ads appear only once, at the end of the Pluto (∞ Challenge) bonus mode. · Regular planet modes are fully ad-free — during and after the timer · One ad only at the end of Pluto ∞ mode · No ads during the timer or while you're operating the screen · We configure AdMob not to receive the advertising identifier (IDFA) · Data stays on your device, never sent externally May your daily breaks become a little space adventure. ■ Sister apps "LastDays" — counts down the time left with your kid, in "how many more times." "TodoGatya" — for slow mornings — kids draw the next task from a gacha and start with a surprise.

Screenshots

Solar System Clock4 screens
PlanetLoopTimer3 screens

Verdict

The call

The clearest difference is in-app purchases: PlanetLoopTimer at none against Solar System Clock's 1. PlanetLoopTimer also leads on iOS requirement (15.1 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Solar System Clock sells 1 one-off in-app purchase. PlanetLoopTimer asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 6 weeks. The most recent releases landed on September 30, 2026 and September 24, 2026 respectively.

Scorecard2 real differences · 6 level
Solar System Clock versus PlanetLoopTimer: the parameters behind the verdict, then further details
ParameterSolar System ClockPlanetLoopTimer
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyEvery 6 weeksEvery 6 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, Apple WatchiPhone, iPad, iPod
Requires iOS18.015.1 — better
Further details — not scored
Size26 MB31 MB
Age rating4+4+
DeveloperSunita GeorgeTatsuro Saito

In-app purchases

1 purchases

Solar System Clock

One-time1
  • All Planets and Dwarf Planets$2.99
None

PlanetLoopTimer

No in-app purchases

Questions

Is Solar System Clock free?
Solar System Clock is free to download, with in-app purchases available.
Is PlanetLoopTimer free?
PlanetLoopTimer is free to download, with no in-app purchases.
Do Solar System Clock or PlanetLoopTimer have ads?
Neither Solar System Clock nor PlanetLoopTimer shows ads.
Which is updated more often, Solar System Clock or PlanetLoopTimer?
Solar System Clock ships an update every 6 weeks, and PlanetLoopTimer every 6 weeks. Most recently, Solar System Clock was updated on September 30, 2026 and PlanetLoopTimer on September 24, 2026.

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