Project Planet Space vs Solar System Clock
Price, ratings, monetisation and update history for both apps, side by side โ with what reviewers say about each.
Project Planet Space
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Project Planet - an interactive map of our solar system How much would you weigh on Jupiter? Why does a day on Mercury last longer than its year? Project Planet turns space facts into a fingertip-sized journey. Scroll through all nine planets (Pluto included), feel each world's pull on your own body, and explore the numbers astronomers have spent decades collecting. Highlights - Sticky scroll across the system: from Mercury to Pluto, each planet stays centred long enough for you to take it in. - You, on every world: enter your weight and age once and watch them recalculated by each planet's gravity and orbital period. - Five rich widgets per planet: surface temperature with reference markers (Antarctica, freezing, boiling), atmospheric pressure with composition chart, travel times from Earth from walking up to the speed of light, gravitational force with everyday objects (phone, backpack, car), and an interactive pressure simulator with phase changes for water, oxygen, CO2, hydrogen, nitrogen and mercury (Antoine equation under the hood). - Six languages: Czech, English, German, Slovak, Spanish and French, auto-detected from your device. - Metric or imperial: switch instantly; weights, temperatures and distances follow your preference. - Crafted to feel like a small cosmic museum: dark cosmic theme, hand-tuned typography, subtle scroll choreography, and a right rail that lets you jump to any planet. - Built on real data: gravitational accelerations, orbital periods, NASA mean temperatures, atmospheric compositions and substance phase transitions. Requires an internet connection. The app runs as a continuously updated webview and uses native iOS capabilities such as haptic feedback to add a tactile dimension to your interstellar journey.
Solar System Clock
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See the positions of all planets in our Solar System based on the current date. Or, you can set your own custom date to see the alignment of our planets from a future date or a past date. You can use this app to find out the best time to watch a planet in the sky by finding out when it will be closest to Earth.
Screenshots
Verdict
The clearest difference is update cadence: Solar System Clock at every 2 days against Project Planet Space's every 25 months. On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Project Planet Space ships an update every 25 months, Solar System Clock every 2 days. The most recent releases landed on September 30, 2026 and October 9, 2026 respectively.
| Parameter | Project Planet Space | Solar System Clock |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 25 months | Every 2 days โ better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 15.0 โ better | 16.6 |
| Further details โ not scored | ||
| Size | 2 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Miroslav Hanzelka | Mateusz Andrzejczuk |
In-app purchases
Project Planet Space
No in-app purchases
Solar System Clock
No in-app purchases
Questions
Is Project Planet Space free?
Is Solar System Clock free?
Do Project Planet Space or Solar System Clock have ads?
Which is updated more often, Project Planet Space or Solar System Clock?
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