# Shaky Heels vs Muscle Stack

The clearest difference is update cadence: Shaky Heels at weekly against Muscle Stack's every 29 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.

Shaky Heels ships an update weekly, Muscle Stack every 29 months. The most recent releases landed on October 3, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Shaky Heels | Muscle Stack |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Weekly** | Every 29 months |
| Size | 89 MB | 84 MB |
| Requires iOS | **11.0** | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ela Game](https://appshunter.io/developer/1536955498) | [omer cetin](https://appshunter.io/developer/1584332419) |

## What reviewers say

### Shaky Heels

[App page](https://appshunter.io/ios/app/shaky-heels/id1599098847)

**Features:** macOS Compatibility

**In-app purchases:** none


### Muscle Stack

[App page](https://appshunter.io/ios/app/muscle-stack/id1604565712)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Shaky Heels free?

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

### Is Muscle Stack free?

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

### Do Shaky Heels or Muscle Stack have ads?

Both Shaky Heels and Muscle Stack show ads.

### Which is updated more often, Shaky Heels or Muscle Stack?

Shaky Heels ships an update weekly, and Muscle Stack every 29 months. Most recently, Shaky Heels was updated on October 3, 2026 and Muscle Stack on October 8, 2026.

---

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