Tumbling Difficulty Calculator vs Stoi Replay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Tumbling Difficulty Calculator
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The Tumbling Difficulty Calculator is a straightforward app designed for power tumblers. Its purpose is to help users assess the difficulty level of their tumbling passes. By inputting the elements of a pass, the app provides instant calculations of its difficulty. This allows users to evaluate and compare the complexity of different tumbling sequences. The app features a simple and intuitive interface for easy navigation and efficient results. Whether you're a beginner or an experienced athlete, the Tumbling Difficulty Calculator offers a convenient way to analyze and track your progress in power tumbling.
Stoi Replay
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Stoi is a hands-free training mirror. Your phone films the whole time and the screen plays it back a few seconds late, so you can do a skill, turn around, and watch it without ever touching your phone. It works like a mirror that runs a few seconds behind. No hitting record, no buttons between reps. Just train and look up. What you can do: • Watch your last few seconds play back on their own • Swipe to scrub through recent footage • Slow it down or pause to study a skill frame by frame • Save the last 10s, 30s, a full minute, or everything, right to your Camera Roll • It picks the best quality your phone can handle Built for gymnasts, but it works for anything where watching yourself helps. Tumbling, dance, diving, lifting, whatever you train. No account. No sign up. Nothing ever leaves your phone.
Screenshots
Verdict
The clearest difference is update cadence: Stoi Replay at every 4 days against Tumbling Difficulty Calculator's every 2 weeks. Tumbling Difficulty Calculator's advantage is iOS requirement (13.0 vs 15.1). On price, ads, in-app purchases 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Tumbling Difficulty Calculator ships an update every 2 weeks, Stoi Replay every 4 days. The most recent releases landed on October 19, 2026 and October 5, 2026 respectively.
| Parameter | Tumbling Difficulty Calculator | Stoi Replay |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 2 weeks | Every 4 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 14 MB | 35 MB |
| Age rating | 4+ | 4+ |
| Developer | Yohai Wiener | Owen Magraken |
In-app purchases
Tumbling Difficulty Calculator
No in-app purchases
Stoi Replay
No in-app purchases
Questions
Is Tumbling Difficulty Calculator free?
Is Stoi Replay free?
Do Tumbling Difficulty Calculator or Stoi Replay have ads?
Which is updated more often, Tumbling Difficulty Calculator or Stoi Replay?
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