# Muscle Counter vs SIXCORE

The clearest difference is in-app purchases: Muscle Counter at none against SIXCORE's 3. SIXCORE's advantage is ads (none vs shown) and update cadence (every 3 days vs every 6 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. SIXCORE sells 3 in-app purchases, starting at $6.99 per 7 days. Muscle Counter asks for nothing beyond the download.

Muscle Counter ships an update every 6 weeks, SIXCORE every 3 days. The most recent releases landed on November 7, 2026 and November 11, 2026 respectively.

## The numbers

| Metric | Muscle Counter | SIXCORE |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Every 3 days** |
| Monetization | — | Subscription |
| Size | 39 MB | 44 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [yukio nagatomo](https://appshunter.io/developer/719533492) | [Issei Nishi](https://appshunter.io/developer/1896756707) |

## What reviewers say

### Muscle Counter

[App page](https://appshunter.io/ios/app/muscle-counter-workout-timer/id1627957831)

**Features:** Vision Pro support

**In-app purchases:** none


### SIXCORE

[App page](https://appshunter.io/ios/app/sixcore-ai/id6798662458)

This AI-powered app analyzes your abs from a single photo, providing a "deviation score" for each abdominal area. It then generates personalized training plans and predicts your progress over time.

**Highlights:** AI abs analysis from one photo, Deviation score for 4 abdominal areas, Personalized 1-year training plans, Progress prediction, Visual record of changes, Estimated body fat percentage

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| シックスコア（週額） | $6.99 | per 7 days |
| シックスコア（年額割引） | $19.99 | per year |
| シックスコア（年額） | $29.99 | per year |


## Frequently asked questions

### Is Muscle Counter free?

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

### Is SIXCORE free?

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

### Do Muscle Counter or SIXCORE have ads?

Muscle Counter shows ads; SIXCORE does not.

### Which is updated more often, Muscle Counter or SIXCORE?

Muscle Counter ships an update every 6 weeks, and SIXCORE every 3 days. Most recently, Muscle Counter was updated on November 7, 2026 and SIXCORE on November 11, 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.*