# Exercise Institute vs Flex Log

The clearest difference is update cadence: Flex Log at every 5 days against Exercise Institute's every 2 months. Flex Log also leads on iOS requirement (12.4 vs 16.0). On price, ads, in-app purchases and device support there is nothing between them.

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

Exercise Institute ships an update every 2 months, Flex Log every 5 days. The most recent releases landed on October 12, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Exercise Institute | Flex Log |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Ad-supported | — |
| Size | 194 MB | 18 MB |
| Requires iOS | 16.0 | **12.4** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Exercise Institute](https://appshunter.io/developer/1789039012) | [Aaron Larner](https://appshunter.io/developer/950120608) |

## What reviewers say

### Exercise Institute

[App page](https://appshunter.io/ios/app/exercise-institute/id1059062255)

Book and pay for specialized cycling, running, and swimming performance testing and training sessions. The app offers a convenient way to schedule your fitness assessments and training programs at their athlete lab.

**Highlights:** Book fitness sessions, Pay for sessions, Cycling testing, Running testing, Swimming testing, Performance analysis

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

**In-app purchases:** none


### Flex Log

[App page](https://appshunter.io/ios/app/flex-log/id6476252928)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Exercise Institute free?

Exercise Institute is free to download, with no in-app purchases.

### Is Flex Log free?

Flex Log is free to download, with no in-app purchases.

### Do Exercise Institute or Flex Log have ads?

Neither Exercise Institute nor Flex Log shows ads.

### Which is updated more often, Exercise Institute or Flex Log?

Exercise Institute ships an update every 2 months, and Flex Log every 5 days. Most recently, Exercise Institute was updated on October 12, 2026 and Flex Log on October 3, 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.*