# THE I/O vs didit.fyi

The clearest difference is in-app purchases: THE I/O at none against didit.fyi's 2. THE I/O also leads on iOS requirement (12.0 vs 15.1). didit.fyi's advantage is update cadence (every 3 weeks vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. didit.fyi sells 2 in-app purchases, starting at $12.99 per month. THE I/O asks for nothing beyond the download.

THE I/O ships an update every 4 months, didit.fyi every 3 weeks. Both last shipped on October 24, 2026.

## The numbers

| Metric | THE I/O | didit.fyi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (14 ratings)](https://appshunter.io/ios/app/the-io/id1576813737/reviews)** | — |
| Number of ratings | **14** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 195 MB | 56 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The IO](https://appshunter.io/developer/1576813739) | [Mithras R&D AS](https://appshunter.io/developer/1863641485) |

## What reviewers say

### THE I/O

[App page](https://appshunter.io/ios/app/the-io/id1576813737)

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:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### didit.fyi

[App page](https://appshunter.io/ios/app/diditfyi/id6756920185)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| didit.fyi Premium | $12.99 | per month |
| didit.fyi Premium | $99.99 | per year |


## Frequently asked questions

### Is THE I/O free?

THE I/O is free to download, with no in-app purchases.

### Is didit.fyi free?

didit.fyi is free to download, with in-app purchases available.

### Do THE I/O or didit.fyi have ads?

Neither THE I/O nor didit.fyi shows ads.

### Which is updated more often, THE I/O or didit.fyi?

THE I/O ships an update every 4 months, and didit.fyi every 3 weeks. Most recently, THE I/O was updated on October 24, 2026 and didit.fyi on October 24, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*