Planetary Clock vs Solar System Clock
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Planetary Clock
Visualize the precise positions of all planets in the Solar System for any given day. It uses accurate NASA data for orbital calculations and relative planet sizing, offering a clear, educational view of celestial mechanics.
- Real-time planet positions
- Accurate orbital calculations
- Uses NASA data
- Relative planet sizing
- Educational solar system view
Read full descriptionHide full description
Planetary Clock is simple and elegant app what shows positions of all planets of the Solar System at any given day. The app uses precise calculation to determine accurate positions in real time. Sun’s and planets sizes are not to scale in order to show them clearly, but other parameters such as size of orbit, eccentricity, shape of the orbit and position of planets are calculated using precise NASA data. Planets are also realistically sized to each other
Solar System Clock
Read full descriptionHide full description
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 price: Solar System Clock at Free against Planetary Clock's $0.99. Solar System Clock also leads on update cadence (every 2 days vs every 27 months). Planetary Clock's advantage is iOS requirement (11.4 vs 16.6). On ads, in-app purchases 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
Solar System Clock is free to download; Planetary Clock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Planetary Clock ships an update every 27 months, Solar System Clock every 2 days. The most recent releases landed on October 16, 2026 and October 9, 2026 respectively.
| Parameter | Planetary Clock | Solar System Clock |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.9 (34 ratings) — better | — |
| Positive reviews | 57.1% of reviews | — |
| Number of ratings | 34 — better | — |
| Update frequency | Every 27 months | Every 2 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Requires iOS | 11.4 — better | 16.6 |
| Further details — not scored | ||
| Size | 14 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | Piotr Knapczyk | Mateusz Andrzejczuk |
In-app purchases
Planetary Clock
No in-app purchases
Solar System Clock
No in-app purchases
Questions
Is Planetary Clock free?
Is Solar System Clock free?
Do Planetary Clock or Solar System Clock have ads?
Which is updated more often, Planetary Clock or Solar System Clock?
Other comparisons
