Comparison

THE I/O vs Gait Pro

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

Head to head
About

THE I/O

Book challenging and surprising group fitness classes. Manage your personal details and access contact information easily. Discover more features and expect the unexpected.

Highlights
  • Book group fitness classes
  • Manage personal details
  • Access contact information
  • Discover new features
  • Challenging workouts
Features
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Experience THE I/O anytime, anywhere with our app. Book group classes designed to challenge you, move you, and surprise you; manage your personal details or easily access our contact information. And this is just the beginning… there’s so much more to discover! Expect The Unexpected - THE I/O

About

Gait Pro

Features
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Gait Pro shows you how you walk, not just how much. Your iPhone and Apple Watch already measure eight things about the way you walk. Apple Health records them and rarely explains them. Gait Pro reads those measurements and turns them into something you can follow. THE EIGHT MEASUREMENTS Walking speed, step length, walking asymmetry, double support and walking steadiness come from your iPhone. Six-minute walk distance comes from your Apple Watch. Stair ascent and descent speed complete the set. GROUPED BY WHERE THEY COME FROM Cards are grouped by what produces them, so when something is missing you learn what to do about it instead of staring at an empty chart. Carry your iPhone in a pocket. Wear your watch. Each group says which, and the advice disappears once the data arrives. CHANGE YOU CAN TRUST Apple publishes how small a change each of these measurements can reliably detect. Gait Pro shades that range on every chart and says plainly when a month's movement falls inside it, so you are not reading meaning into noise. TODAY, AND THE DAYS BEHIND IT A footprint trail for today's steps, your week at a glance, and history you can move through by range. Built for iPhone and iPad, in light and dark. Gait Pro reads measurements taken by Apple Health on your iPhone and Apple Watch. It does not measure anything itself, and nothing leaves your device. It is not a medical device and does not diagnose anything. Talk to a doctor before making decisions about your health.

Screenshots

THE I/O4 screens
Gait Pro4 screens

Verdict

The call

The clearest difference is price: THE I/O at Free against Gait Pro's $4.99. THE I/O also leads on update cadence (every 4 months vs every 27 months) and iOS requirement (12.0 vs 18.0). On 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

THE I/O is free to download; Gait Pro costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

THE I/O ships an update every 4 months, Gait Pro every 27 months. The most recent releases landed on November 3, 2026 and November 4, 2026 respectively.

Scorecard3 real differences · 6 level
THE I/O versus Gait Pro: the parameters behind the verdict, then further details
ParameterTHE I/OGait Pro
PriceFree — better$4.99
Rating4.9 (14 ratings) — better—
Number of ratings14 — better—
Update frequencyEvery 4 months — betterEvery 27 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better18.0
Further details — not scored
Size195 MB1 MB
Age rating4+4+
DeveloperThe IOKai Kunze

In-app purchases

None

THE I/O

No in-app purchases

None

Gait Pro

No in-app purchases

Questions

Is THE I/O free?
THE I/O is free to download, with no in-app purchases.
Is Gait Pro free?
Gait Pro costs $4.99, with no in-app purchases.
Do THE I/O or Gait Pro have ads?
Neither THE I/O nor Gait Pro shows ads.
Which is updated more often, THE I/O or Gait Pro?
THE I/O ships an update every 4 months, and Gait Pro every 27 months. Most recently, THE I/O was updated on November 3, 2026 and Gait Pro on November 4, 2026.

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