Graviton Sim vs By
Price, ratings, monetisation and update history for both apps, side by side β with what reviewers say about each.
Graviton Sim
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A physics simulation exploring gravitational dynamics and orbital mechanics.
By
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The Physics of Stars β in your hand. By-Pass is an interactive physics laboratory that brings the fascinating complexity of Newtonian mechanics to your iPad and iPhone. Here, you become the architect of orbital systems and watch simple forces give rise to highly complex mathematical patterns. Unlike simple animations, By-Pass uses its own physics engine with a simulation rate of 60 Hz to calculate real gravitational interactions accurately and without compromise. The physical core: Master of Orbits: Create satellites and planets with intuitive gestures. Use drag gestures to define the initial launch velocity and watch as objects settle into stable orbits or drift away into the vastness of outer space. Dynamic Gravitational Centers: Choose between 1, 2, or 3 suns. Experiment with the unstable and fascinating solutions of the famous threeβbody problem. Each additional center dramatically alters the gravitational field and sends your planets onto unpredictable, dancing trajectories. Variable Gravitational Exponents: Switch between a fully realistic simulation (exponent 2.0) and modified fields for extremely longβlasting, geometric path traces. Precision & Performance: Experience the simulation with a render target of 120 FPS. The physics runs independently at 60 Hz, ensuring smooth visuals even in the most complex systems. Procedural Matter: Each planet (Rocky, Lava, Gas, Ocean, Icy) is generated at runtime and behaves as a discrete physical entity within the simulation.
Screenshots
Verdict
The clearest difference is device support: Graviton Sim at 4 against By's 2. Graviton Sim also leads on iOS requirement (15.6 vs 26.0). On price, update cadence, ads and in-app purchases there is nothing between them.
Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Graviton Sim ships an update every 9 days, By fortnightly. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.
| Parameter | Graviton Sim | By |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 9 days β better | Fortnightly |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod, Mac β better | iPhone, iPad |
| Requires iOS | 15.6 β better | 26.0 |
| Further details β not scored | ||
| Size | 63 MB | 14 MB |
| Age rating | 4+ | 4+ |
| Developer | Scott Carnett | Appno GmbH |
In-app purchases
Graviton Sim
No in-app purchases
By
No in-app purchases









