# MUSCL vs IronZenkai

MUSCL and IronZenkai are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. MUSCL sells 2 in-app purchases, starting at $19.99 per month and IronZenkai sells 3 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

MUSCL ships an update every 4 days, IronZenkai every 5 days. Both last shipped on November 5, 2026.

## The numbers

| Metric | MUSCL | IronZenkai |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ironzenkai-workout-tracker/id6773331429/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 5 days |
| Monetization | — | Free with in-app purchases |
| Size | 59 MB | 167 MB |
| Requires iOS | **15.1** | 15.5 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Apple Watch** |
| Age rating | 17+ | 12+ |
| Developer | [IKARUS PTY LTD](https://appshunter.io/developer/1879736035) | [Melovin Pedida](https://appshunter.io/developer/1674222169) |

## What reviewers say

### MUSCL

[App page](https://appshunter.io/ios/app/muscl-physique-intelligence/id6759597207)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| MUSCL Monthly | $19.99 | per month |
| MUSCL Annual | $99.99 | per year |


### IronZenkai

[App page](https://appshunter.io/ios/app/ironzenkai-workout-tracker/id6773331429)

This app combines workout tracking with macro and calorie monitoring, offering AI-powered coaching based on your training and nutrition data. Log sets, meals, and track progress with features like photo food logging and adaptive TDEE.

**Highlights:** AI-powered workout and nutrition coaching, Periodized program planning, Progressive overload suggestions, Photo food logging with calorie/macro analysis, Adaptive TDEE tracking, Offline functionality

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IronZenkai Premium | $1.99 | per month |
| IronZenkai Premium (Yearly) | $19.99 | per year |
| IronZenkai Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is MUSCL free?

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

### Is IronZenkai free?

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

### Do MUSCL or IronZenkai have ads?

Neither MUSCL nor IronZenkai shows ads.

### Which is updated more often, MUSCL or IronZenkai?

MUSCL ships an update every 4 days, and IronZenkai every 5 days. Most recently, MUSCL was updated on November 5, 2026 and IronZenkai on November 5, 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.*