Circle Tracker vs 3
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Circle Tracker
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Easy to use, full of fun to control, but also make a variety of imaginative play possible. Programming can make the robot according to your instructions to complete a series of actions, ONEBOT robot unique graphical programming mode, the original professional, complex command code graphics, modular, with the fun of the game tutorial, easy to learn, full of endless fun to explore.
3
Explore the wonders of gravity with this 2D N-body simulator. Experiment with celestial mechanics, create mesmerizing patterns, and customize your simulations. It's a fun and educational playground for anyone curious about physics.
- Simulate gravity interactions
- Explore preset configurations
- Customize body size, color, and trails
- Educational and fun physics experiments
- Create mesmerizing visual patterns
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Explore the Wonders of Gravity with 3-Body - A 2D N-Body Simulator! Dive into the fascinating world of physics with 3-Body, a unique 2D N-body simulator inspired by the famous “3-Body Problem” in physics (also the book series and now Netflix show). Whether you’re a science enthusiast, a fan of celestial mechanics, or just looking for something cool to play with, 3-Body offers a fun and educational experience. Key Features: • Simulate Gravity: Watch as bodies with mass interact with each other, forming complex and mesmerizing patterns as they move under the influence of gravity. • Preset Configurations: Explore stable configurations such as the figure-eight orbit of three bodies, a circular orbit of three masses, or a large body orbited by smaller ones. • Customization: Unleash your creativity by customizing the size, color, and trails of the bodies you create. Tailor each simulation to your liking and see how it affects the system. • Educational & Fun: While the app is primarily informational, it’s also incredibly fun to experiment with. Whether you’re learning about gravitational physics or just enjoying the visual spectacle, 3-Body has something for everyone. Why 3-Body? 3-Body isn’t just a tool—it’s a playground for your imagination. With no specific goal other than to explore, discover, and enjoy, this app brings the wonders of gravity to your fingertips. Whether you’re a student, a teacher, or just someone curious about the universe, 3-Body is sure to captivate and entertain you. Download 3-Body today and embark on your journey through the cosmos!
Screenshots
Verdict
The clearest difference is iOS requirement: Circle Tracker at 8.0 against 3's 15.0. On price, update cadence, ads and in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Circle Tracker ships an update every 6 weeks, 3 monthly. The most recent releases landed on September 23, 2026 and September 18, 2026 respectively.
| Parameter | Circle Tracker | 3 |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (3 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 3 — better |
| Update frequency | Every 6 weeks | Monthly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 48 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Beijing IQI Technology Co.,Ltd. | Cubic Insights LLC |
In-app purchases
Circle Tracker
No in-app purchases
3
No in-app purchases
