Terje Tornado vs Gravity Zen
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Terje Tornado
An interactive digital mapping platform for outdoor enthusiasts, offering an "on-mountain" gaming experience. It leverages GPS technology to enhance active lifestyles and outdoor play.
- Digital mapping platform
- On-mountain gaming experience
- Designed for outdoor enthusiasts
- Active lifestyle focus
- GPS-powered
Read full descriptionHide full description
Terje Tornado powered by MountainMap™ is a digital mapping platform designed and developed for the outdoor enthusiast. We've created an "on-mountain" gaming experience for the person with an active lifestyle and loves to play outside. DISCLAIMER: Continued use of GPS running in the background can dramatically decrease battery life.
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.
Screenshots
Verdict
The clearest difference is price: Terje Tornado at Free against Gravity Zen's $0.99. Terje Tornado also leads on in-app purchases (none vs 2) and rating (5.0 vs 4.8). Gravity Zen's advantage is ratings volume (70 vs 3). 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
Terje Tornado is free to download; Gravity Zen costs $0.99 up front. Gravity Zen sells 2 one-off in-app purchases. Terje Tornado asks for nothing beyond the download.
Terje Tornado holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Gravity Zen has 70 ratings behind it against 3, so its average is the more settled of the two.
Terje Tornado ships an update every 5 days, Gravity Zen every 9 days. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.
| Parameter | Terje Tornado | Gravity Zen |
|---|---|---|
| Price | Free — better | $0.99 |
| Rating | 5.0 (3 ratings) — better | 4.8 (70 ratings) |
| Positive reviews | — | 93.8% of reviews |
| Number of ratings | 3 | 70 — better |
| Update frequency | Every 5 days — better | Every 9 days |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 328 MB | 13 MB |
| Age rating | 4+ | 4+ |
| Developer | ECO Systems | Dominik Hauser |
Customer experience
Terje Tornado
Gravity Zen
In-app purchases
Terje Tornado
No in-app purchases
Gravity Zen
- Small Tip$0.99
- Large tip$2.99
Questions
Is Terje Tornado free?
Is Gravity Zen free?
Which has better reviews, Terje Tornado or Gravity Zen?
Do Terje Tornado or Gravity Zen have ads?
Which is updated more often, Terje Tornado or Gravity Zen?
Other comparisons
