# Slocum vs Ankle Flex

The clearest difference is update cadence: Slocum at monthly against Ankle Flex's every 5 months. 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.

Slocum ships an update monthly, Ankle Flex every 5 months. The most recent releases landed on September 25, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Slocum | Ankle Flex |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Monthly** | Every 5 months |
| Size | 62 MB | 10 MB |
| Requires iOS | **14.3** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [DONALD B SLOCUM RESEARCH AND EDUCATIONAL FOUNDATION FOR ORTHOPEDIC AND SPORTS MEDICINE](https://appshunter.io/developer/1629669904) | [Perry Hooker](https://appshunter.io/developer/1827290197) |

## What reviewers say

### Slocum

[App page](https://appshunter.io/ios/app/slocum-app/id1629669902)

**Features:** macOS Compatibility

**In-app purchases:** none


### Ankle Flex

[App page](https://appshunter.io/ios/app/ankle-flex/id6748759970)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Slocum free?

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

### Is Ankle Flex free?

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

### Do Slocum or Ankle Flex have ads?

Neither Slocum nor Ankle Flex shows ads.

### Which is updated more often, Slocum or Ankle Flex?

Slocum ships an update monthly, and Ankle Flex every 5 months. Most recently, Slocum was updated on September 25, 2026 and Ankle Flex on October 12, 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.*