Gravity Zen vs Chemle
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Gravity Zen
Observe small circles interacting with a central gravity field. Add numerous boxes to explore how they naturally settle into a stable arrangement. It's a simple yet captivating simulation.
- Gravity field simulation
- Add multiple objects
- Observe stable configurations
- Interactive physics
- Minimalist design
Read full descriptionHide full description
Watch small circles move around a central gravity field. Add as many boxes as you like. Explore how they find a "stable" configuration by themselves.
Chemle
Read full descriptionHide full description
Test your knowledge of chemistry with this fun and educational game. You'll have five attempts to guess the secret chemistry formula. Each round, you'll be presented with a series of blank spaces representing a chemical term. Use your knowledge of chemical elements, compounds, and reactions to guess the correct formula. The game will provide helpful hints, such as number of correct letters in your guess. But be careful - just like in chemistry, a wrong guess can lead to disastrous results! Chemle is perfect for anyone looking to expand their chemistry knowledge and enjoy a fun and challenging word game. Download now and start guessing!
Screenshots
Verdict
The clearest difference is price: Chemle at Free against Gravity Zen's $0.99. Chemle also leads on in-app purchases (none vs 2) and iOS requirement (13.0 vs 15.0). On update cadence, ads 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
Chemle is free to download; Gravity Zen costs $0.99 up front. Gravity Zen sells 2 one-off in-app purchases. Chemle asks for nothing beyond the download.
Gravity Zen ships an update every 9 days, Chemle every 2 weeks. The most recent releases landed on October 17, 2026 and October 4, 2026 respectively.
| Parameter | Gravity Zen | Chemle |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 4.8 (68 ratings) — better | — |
| Positive reviews | 93.3% of reviews | — |
| Number of ratings | 68 — better | — |
| Update frequency | Every 9 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 13 MB | 65 MB |
| Age rating | 4+ | 4+ |
| Developer | Dominik Hauser | Jan Stepien |
In-app purchases
Gravity Zen
- Small Tip$0.99
- Large tip$2.99
Chemle
No in-app purchases
