# FormFix vs 3DSeg/JointAngles

The clearest difference is in-app purchases: 3DSeg/JointAngles at none against FormFix's 2. FormFix's advantage is iOS requirement (15.6 vs 26.2). On price, rating, ratings volume and ads there is nothing between them.

Both are free to download. FormFix sells 2 in-app purchases, starting at $8.99 per month. 3DSeg/JointAngles asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for FormFix against 5.0 for 3DSeg/JointAngles. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

## The numbers

| Metric | FormFix | 3DSeg/JointAngles |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/formfix-fix-exercise-posture/id6736768112/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/3dsegjointangles/id6761221410/reviews) |
| Number of ratings | 1 | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Monetization | Freemium | **Free** |
| Size | 67 MB | 5 MB |
| Requires iOS | **15.6** | 26.2 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Solomon Haberkost](https://appshunter.io/developer/1773304250) | [Boyi Dai](https://appshunter.io/developer/1888293968) |

## What reviewers say

### FormFix

[App page](https://appshunter.io/ios/app/formfix-fix-exercise-posture/id6736768112)

This AI-powered app analyzes your lifting form in real-time, offering instant feedback and corrections for exercises like squats. Record and review your lifts in slow motion to refine technique and achieve your fitness goals.

**Highlights:** Real-time AI form tracking, Instant feedback on technique, Detailed analysis for squats, Slow-motion lift review, Technique refinement, Performance enhancement

**Features:** macOS Compatibility, Family Sharing

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Premium | $8.99 | per month |
| 1 Year Premium | $99.99 | per year |


### 3DSeg/JointAngles

[App page](https://appshunter.io/ios/app/3dsegjointangles/id6761221410)

This app measures three-dimensional angles of body segments and joints in real-time using your iPhone's motion sensors. It is designed for researchers, clinicians, and trainers to analyze movement without external hardware. Data can be exported for further analysis.

**Highlights:** Real-time 3D angle display at 60 Hz, Six selectable Cardan/Euler rotation sequences, Calibrate to any starting position, Built-in angle time-series plot, CSV export via iOS Share Sheet, Works completely offline

**In-app purchases:** none


## Frequently asked questions

### Is FormFix free?

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

### Is 3DSeg/JointAngles free?

3DSeg/JointAngles is free to download, with no in-app purchases.

### Which has better reviews, FormFix or 3DSeg/JointAngles?

FormFix and 3DSeg/JointAngles are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do FormFix or 3DSeg/JointAngles have ads?

Neither FormFix nor 3DSeg/JointAngles shows ads.

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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.*