# Muscle & Motion vs Posture Chart

The clearest difference is ratings volume: Muscle & Motion at 681 against Posture Chart's 3. Posture Chart's advantage is review sentiment (100% vs 77%). On price, rating, update cadence and ads there is nothing between them.

Both are free to download. Muscle & Motion sells 3 in-app purchases, starting at $15.00 per month and Posture Chart sells 2 in-app purchases, starting at $9.99 per month. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for Muscle & Motion against 5.0 for Posture Chart. That said, the two scores are not equally well evidenced: Muscle & Motion has 681 ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 77% of Muscle & Motion's written reviews are positive against 100% of Posture Chart's.

Muscle & Motion ships an update monthly, Posture Chart every 3 weeks. The most recent releases landed on September 21, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Muscle & Motion | Posture Chart |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.9 (681 ratings)](https://appshunter.io/ios/app/muscle-and-motion-posture/id1199500066/reviews) | **[5.0 (3 ratings)](https://appshunter.io/ios/app/posture-chart/id6744533947/reviews)** |
| Number of ratings | **681** | 3 |
| Positive reviews | 76.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 183 MB | 6 MB |
| Requires iOS | 17.0 | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Muscle & Motion LTD](https://appshunter.io/developer/1110670112) | [Kent Health Systems, Inc.](https://appshunter.io/developer/1808016208) |

## What reviewers say

### Muscle & Motion

[App page](https://appshunter.io/ios/app/muscle-and-motion-posture/id1199500066)

This app provides a 3D learning platform to understand posture from an anatomical and biomechanical perspective. It visualizes muscular patterns, common postural faults, and offers corrective exercises. Ideal for professionals and individuals seeking to improve posture and movement.

**Highlights:** 3D Postural Analysis Library, Corrective Exercise Library, Biomechanical Principles Visualization, Muscle Activation in 3D, Common Postural Faults Explained, Alignment and Movement Learning

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Full Access | $15.00 | per month |
| Yearly Full Access | $89.00 | per year |
| Yearly Subscription Bonus | $89.00 | per year |

**What reviewers like**

- 🚀 Animated anatomy magic
- 👍 Very educational
- 👍 Great body of work
- 👍 Brilliant and very helpful
- 👍 Fabulous and makes you better

**What reviewers complain about**

- 🐛 Doesn't work on iOS 18.3
- 💰 Very expensive

**Reported bugs**

- Paid subscription not working, only free version available
- Login issues

**Requested features**

- Add Russian language
- Add Spanish language


### Posture Chart

[App page](https://appshunter.io/ios/app/posture-chart/id6744533947)

This app transforms your iPhone into a portable posture assessment tool. It allows health professionals to quickly and accurately analyze posture, document progress, and educate clients with visual aids. Ideal for chiropractors, therapists, and trainers on the go.

**Highlights:** Portable postural analysis, Professional-grade grid chart, Photo documentation, Client education tools, Customizable workflow, Progress tracking

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Watermark - Monthly | $9.99 | per month |
| Watermark - One Time | $149.99 | one-time |


## Frequently asked questions

### Is Muscle & Motion free?

Muscle & Motion is free to download, with in-app purchases available.

### Is Posture Chart free?

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

### Which has better reviews, Muscle & Motion or Posture Chart?

Posture Chart is rated higher. Muscle & Motion averages 4.9 out of 5 from 681 ratings, while Posture Chart averages 5.0 from 3 ratings.

### Do Muscle & Motion or Posture Chart have ads?

Neither Muscle & Motion nor Posture Chart shows ads.

### Which is updated more often, Muscle & Motion or Posture Chart?

Muscle & Motion ships an update monthly, and Posture Chart every 3 weeks. Most recently, Muscle & Motion was updated on September 21, 2026 and Posture Chart on June 1, 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.*