THE I/O vs Gait Pro
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- Book group fitness classes
- Manage personal details
- Access contact information
- Discover new features
- Challenging workouts
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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
Gait Pro
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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
Verdict
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
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.
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.
| Parameter | THE I/O | Gait Pro |
|---|---|---|
| Price | Free — better | $4.99 |
| Rating | 4.9 (14 ratings) — better | — |
| Number of ratings | 14 — better | — |
| Update frequency | Every 4 months — better | Every 27 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 195 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | The IO | Kai Kunze |
In-app purchases
THE I/O
No in-app purchases
Gait Pro
No in-app purchases









