# AI Endurance vs Reaction Workout Timer

The clearest difference is in-app purchases: Reaction Workout Timer at none against AI Endurance's 2. Reaction Workout Timer also leads on update cadence (every 3 weeks vs every 5 months). AI Endurance's advantage is device support (3 vs 1) and iOS requirement (15.0 vs 18.2). On price and ads there is nothing between them.

Both are free to download. AI Endurance sells 2 in-app purchases, starting at $20.00 per month. Reaction Workout Timer asks for nothing beyond the download.

AI Endurance ships an update every 5 months, Reaction Workout Timer every 3 weeks. The most recent releases landed on September 21, 2026 and July 1, 2026 respectively.

## The numbers

| Metric | AI Endurance | Reaction Workout Timer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (22 ratings)](https://appshunter.io/ios/app/ai-endurance/id6714485075/reviews)** | — |
| Number of ratings | **22** | — |
| Positive reviews | 62.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 weeks** |
| Monetization | Freemium | — |
| Size | 3 MB | 8 MB |
| Requires iOS | **15.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [AI Endurance](https://appshunter.io/developer/1544807340) | [Hitfire Production AB](https://appshunter.io/developer/1517601288) |

## What reviewers say

### AI Endurance

[App page](https://appshunter.io/ios/app/ai-endurance/id6714485075)

This AI-powered fitness coach analyzes your personal data to create a customized training plan. It's designed for athletes looking to optimize their performance and achieve superior results by training smarter.

**Highlights:** AI-powered performance analysis, Personalized training plans, Optimized for unique physiology, Trusted by cyclists, runners, triathletes, Train smarter, not harder

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Subscription | $20.00 | per month |
| Yearly Subscription | $200.00 | per year |


### Reaction Workout Timer

[App page](https://appshunter.io/ios/app/reaction-workout-timer/id6755075522)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AI Endurance free?

AI Endurance is free to download, with in-app purchases available.

### Is Reaction Workout Timer free?

Reaction Workout Timer is free to download, with no in-app purchases.

### Do AI Endurance or Reaction Workout Timer have ads?

Neither AI Endurance nor Reaction Workout Timer shows ads.

### Which is updated more often, AI Endurance or Reaction Workout Timer?

AI Endurance ships an update every 5 months, and Reaction Workout Timer every 3 weeks. Most recently, AI Endurance was updated on September 21, 2026 and Reaction Workout Timer on July 1, 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.*