Comparison

Tumbling Difficulty Calculator vs Stoi Replay

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

About

Stoi Replay

Features
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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

Tumbling Difficulty Calculator1 screens
Stoi Replay3 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

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.

Scorecard2 real differences · 4 level
Tumbling Difficulty Calculator versus Stoi Replay: the parameters behind the verdict, then further details
ParameterTumbling Difficulty CalculatorStoi Replay
PriceFreeFree
Update frequencyEvery 2 weeksEvery 4 days — better
AdsNoNo
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.1
Further details — not scored
Size14 MB35 MB
Age rating4+4+
DeveloperYohai WienerOwen Magraken

In-app purchases

None

Tumbling Difficulty Calculator

No in-app purchases

None

Stoi Replay

No in-app purchases

Questions

Is Tumbling Difficulty Calculator free?
Tumbling Difficulty Calculator is free to download, with no in-app purchases.
Is Stoi Replay free?
Stoi Replay is free to download, with no in-app purchases.
Do Tumbling Difficulty Calculator or Stoi Replay have ads?
Neither Tumbling Difficulty Calculator nor Stoi Replay shows ads.
Which is updated more often, Tumbling Difficulty Calculator or Stoi Replay?
Tumbling Difficulty Calculator ships an update every 2 weeks, and Stoi Replay every 4 days. Most recently, Tumbling Difficulty Calculator was updated on October 19, 2026 and Stoi Replay on October 5, 2026.

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