# Aletha vs Cat 4DAT

The clearest difference is ads: Aletha at none against Cat 4DAT's shown. Aletha also leads on iOS requirement (16.0 vs 18.0). Cat 4DAT's advantage is update cadence (weekly vs fortnightly). On price, 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.

Aletha ships an update fortnightly, Cat 4DAT weekly. The most recent releases landed on November 5, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Aletha | Cat 4DAT |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.1 (17 ratings)](https://appshunter.io/ios/app/aletha-muscle-release-routine/id6752910430/reviews)** | — |
| Number of ratings | **17** | — |
| Positive reviews | 63.6% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Fortnightly | **Weekly** |
| Monetization | Free | — |
| Size | 43 MB | 6 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 17+ | 4+ |
| Developer | [Aletha Health](https://appshunter.io/developer/1807613233) | [4DAT LLC](https://appshunter.io/developer/1649051364) |

## What reviewers say

### Aletha

[App page](https://appshunter.io/ios/app/aletha-muscle-release-routine/id6752910430)

Master muscle release techniques with guided routines and expert instruction. This app helps you understand and manage daily muscle tension for improved posture and movement. It provides clear visual and audio cues for precise device usage.

**Highlights:** Guided muscle release timer, Step-by-step device placement, Audio and visual instruction, Support for key tension areas, Post-release mobility exercises, Educational content on relief

**Features:** macOS Compatibility

**In-app purchases:** none


### Cat 4DAT

[App page](https://appshunter.io/ios/app/cat-4dat/id6757195223)

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

**In-app purchases:** none


## Frequently asked questions

### Is Aletha free?

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

### Is Cat 4DAT free?

Cat 4DAT is free to download, with no in-app purchases.

### Do Aletha or Cat 4DAT have ads?

Cat 4DAT shows ads; Aletha does not.

### Which is updated more often, Aletha or Cat 4DAT?

Aletha ships an update fortnightly, and Cat 4DAT weekly. Most recently, Aletha was updated on November 5, 2026 and Cat 4DAT on October 31, 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.*