Planet Gravity vs AR Solar System PRO
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Planet Gravity
Explore the gravitational pull of different celestial bodies. Watch pendulums swing and collide under varying gravitational forces, offering a unique physics simulation experience.
- Select different planets for unique gravity
- Observe pendulum collisions
- Physics-based simulation
- Educational planet facts
- Interactive entertainment
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Planet Gravity isn't just about gravity anymore. Select a planet to get a scrolling fact about that planet on the display. This app is a twist on the Newton’s cradle balance balls. The pendulum balls collide just like the real set and you can select other planets to use that planet’s gravity. How does the pendulum swing with different gravity? Even the Sun has gravity - see what it does to the motion of the pendulums (well they'd probably melt but you get the idea.....)
AR Solar System PRO
Explore the solar system in augmented reality. Place planets in your environment, walk among them, and learn detailed facts. Interact with celestial bodies to view them from all angles.
- Augmented reality planet placement
- Interactive 3D planet models
- Real-time planet rotation and revolution
- Detailed astronomical data for each planet
- Virtual space travel experience
- Gesture-based interaction
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"AR Solar System" turns your device into a telescope in augmented reality for the observation of the planets of the Solar System. Choose and place a planet or several planets in the scene: in your home (in the air, on the floor, on a table, on a wall, on any horizontal surface) or outside the home (ex. open sky)... Observe the planets of our Solar System as you've never seen them before! The planets available for observation are: Sun, Mercury, Venus, Earth, Moon, Mars, Ceres, Jupiter, Saturn, Uranus, Neptune, Pluto, Haumea, Makemake, Eris The software uses the information available on the planets of the Solar System to animate the rotations of the planets: every second corresponds to one hour, each planet rotates at the real speed, in the direction of real rotation. For each planet data are available such as size, rotation period, period of revolution, type of atmosphere, gravity, etc... Walk in the scene with your legs moving between the planets (like travel in space) and observe them with your device like a telescope: - approaching the planet you will see more details such as craters, valleys, plains, mountain ranges, etc... - moving away from the planet, you will see the planet entirely or more planets together - turning around the planet you can see the side of interest or simulate the flight of a spaceship orbiting the planet - by moving over or under the planet you will be able to observe its poles - etc… Interacting manually with the planets you can: - Move the planet in the real scene (pan gesture: dragging a finger on the planet) - Enlarge and shrink the planet (pinch gesture: pinching the planet) - Rotate the planet around its axis of rotation (rotation gesture: rotating the planet with two fingers); manual rotation deactivates the automatic one - Remove the planet from the scene (long press gesture: holding a finger on the planet for half a second) - Add a new planet to the scene by touching the desired position (using horizontal plane in real world or feature points) - Select a planet from the scene and display its characteristics (double tap gesture: tap a planet twice with a finger) Background of the scene: in the presence of light in the real world the milky way and the stars (deep space) are projected as the background of the planets on the walls of your house or in the sky if you are outdoors; in the absence of light (or covering the camera with a finger) moving in the scene will seem to travel in deep space (virtual reality feature… the real world will be removed from the scene). Useful for all those who love to observe the planets of the Solar System in every detail, for teachers, scholars, students, astronomers, etc... UNIVERSAL APP: - You pay only once and run on all your devices
Screenshots
Verdict
The clearest difference is price: Planet Gravity at Free against AR Solar System PRO's $0.99. Planet Gravity also leads on update cadence (every 14 months vs every 46 months). On ads, in-app purchases, device support and iOS requirement 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
Planet Gravity is free to download; AR Solar System PRO costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Planet Gravity ships an update every 14 months, AR Solar System PRO every 46 months. The most recent releases landed on June 7, 2026 and September 12, 2026 respectively.
| Parameter | Planet Gravity | AR Solar System PRO |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | — | 1.0 (1 ratings) — better |
| Positive reviews | 25.0% of reviews | — |
| Number of ratings | — | 1 — better |
| Update frequency | Every 14 months — better | Every 46 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.6 | 16.6 — better |
| Further details — not scored | ||
| Size | 5 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | Niagara Mobile LLC | Gianluca Natalini |
Customer experience
Planet Gravity
AR Solar System PRO
In-app purchases
Planet Gravity
No in-app purchases
AR Solar System PRO
No in-app purchases
Questions
Is Planet Gravity free?
Is AR Solar System PRO free?
Do Planet Gravity or AR Solar System PRO have ads?
Which is updated more often, Planet Gravity or AR Solar System PRO?
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