Planetary Clock vs SystemeSolaire
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
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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
SystemeSolaire
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The solar system is our planetary system, composed of a star, the Sun, and the defined celestial bodies orbiting it: the eight confirmed planets and their 175 known natural satellites, the five dwarf planets and the billions of small bodies and belts. This application puts the solar system at your fingertips. Click on a star or spacecraft to see its detailed information and a selection of videos chosen to shed light on important topics related to that star or spacecraft. This application is a concentrate of scientific knowledge of each celestial body of our solar system. This information is intended for a wide audience and no previous experience/knowledge is necessary. Are you curious? Well, you will be served. Do not hesitate to recommend this to your children, parents, friends, grandparents. There is something for everyone.
Screenshots
Verdict
The clearest difference is update cadence: Planetary Clock at every 27 months against SystemeSolaire's every 55 months. Planetary Clock also leads on price ($0.99 vs $1.99) and iOS requirement (11.4 vs 15.6). 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
Planetary Clock costs $0.99 and SystemeSolaire $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Planetary Clock ships an update every 27 months, SystemeSolaire every 55 months. The most recent releases landed on November 1, 2026 and October 28, 2026 respectively.
| Parameter | Planetary Clock | SystemeSolaire |
|---|---|---|
| Price | $0.99 — better | $1.99 |
| Rating | 4.8 (37 ratings) — better | — |
| Positive reviews | 57.1% of reviews | — |
| Number of ratings | 37 — better | — |
| Update frequency | Every 27 months — better | Every 55 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.4 — better | 15.6 |
| Further details — not scored | ||
| Size | 14 MB | 596 MB |
| Age rating | 4+ | 4+ |
| Developer | Piotr Knapczyk | NMS Narcisse Mavoha Solutions Sarl |
In-app purchases
Planetary Clock
No in-app purchases
SystemeSolaire
No in-app purchases
Questions
Is Planetary Clock free?
Is SystemeSolaire free?
Do Planetary Clock or SystemeSolaire have ads?
Which is updated more often, Planetary Clock or SystemeSolaire?
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