# Fitter - Bike — AI Bike Fitting Service

> AI-powered bicycle fitting service for posture analysis and injury prevention. (iPhone/iPad app by Jongheon Lee.)

- Source: https://appshunter.io/ios/app/fitter-bike/id1528225944 (this page in markdown: same URL + `.md`)
- Developer: [Jongheon Lee](https://appshunter.io/developer/1528225946)
- Category: Health & Fitness, Sports
- Price: Free with in-app purchases
- Rating: 4.67/5 from 66 App Store ratings · 29 written reviews indexed
- Age rating: 4+
- Requires: iOS 17 · 39 MB
- Languages: English, French, German, Korean, Russian, Chinese, Spanish, Chinese
- Released: 2020-10-23
- Data updated: 2026-07-18
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/fitter-bike/id1528225944/reviews.md

## What is Fitter?

Efficient and Safe Bicycle Riding
Incorrect saddle height can increase injury risk. Use Fitter for a quick assessment!
Record your cycling posture and get an easy analysis.

## Key features

- AI-powered posture diagnosis
- Video analysis of riding posture
- Saddle height correction
- Injury risk reduction
- Improved cycling efficiency

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Pro | $4.99 | one-time |


## Recent user reviews (10 of 29)

All indexed reviews: https://appshunter.io/ios/app/fitter-bike/id1528225944/reviews.md

### 1/5 — 카메라 인식안됨 카메라 허용해도 그럼 작동도 안됨

*2025-06-24, version 1.4.1*

이상함

### 1/5 — 使えない

*2025-04-28, version 1.4.1*

足首の角度を作れとか言われても無理　
膝の位置はもっと無理
マーカーが色んな所に移動する
バイクフィットエリートのが全然使える

### 1/5 — Bike fit does not give feedback

*2025-04-21, version 1.4.1*

Disappointed!  Does a video analysis and then gets stuck in a loop asking you to spay when you already have!  Tried to start again, says I have a fit available does the video click next step and asks you to pay!  I ALREADY HAVE!!!

### 3/5 — Wouldn’t work

*2025-03-04, version 1.4.1*

Every time I tried to take a photo or video it produced an error stating there could only be one person in the frame even though that’s all there was. Changing location didn’t help either.
Edit: started working, not sure what changed

### 1/5 — Wouldn’t work

*2025-03-02*

Every time I tried to take a photo or video it produced an error stating there could only be one person in the frame even though that’s all there was. Changing location didn’t help either

### 4/5 — Coole App, mehr Info wäre super

*2024-11-07, version 1.4.0*

Eine ziemlich coole und einfache App. Die Kobelposition oben und unten wird nicht immer exakt erkannt, da wäre ein Tool gut, um die entsprechenden Frames auszuwählen. Zudem wäre eine Information um wie viel Zentimeter man den Sattel hoch oder runter versetzen sollte, gut. Sonst eine gute App

### 5/5 — 광고주들 얼른 들어오셈

*2024-05-07, version 1.1.8*

이거슨 혁명이다

### 5/5 — Genial

*2024-04-15, version 1.1.8*

Excelente app para fittings

### 1/5 — Doesn’t work

*2024-03-27, version 1.1.8*

Tried photo and motion capture, but the points where the hip and ankle are were off, which I imagine would throw everything else off.
Just recommends lowering saddle, without regard for stem length or height, good idea but bad execution. Don’t use this app to adjust your fit!
I recommend Wrenchscience.com fit calculator, much more reliable and it’s free!

### 5/5 — Easy and helpful

*2024-03-18, version 1.1.8*

Awesome app for figuring out the best seat height!

## Frequently asked questions about Fitter

### What does Fitter - Bike do?

Fitter - Bike is an AI-powered service that helps you ride your bicycle more efficiently and safely. It analyzes your riding posture using video recordings to diagnose issues like improper saddle height and provides corrections to reduce the risk of injury.

### How does the AI bike fitting work?

You take a video of yourself while riding your bike. The app's AI then analyzes this video to diagnose your posture, specifically focusing on elements like saddle height. It provides an easy-to-understand diagnosis and suggests corrections.

### Is Fitter - Bike free to use?

The app is free to download and use, but it offers in-app purchases. This means some features or advanced analysis might require a purchase.

### What are the benefits of using Fitter - Bike?

The primary benefits include improving your cycling efficiency and safety. By correcting improper saddle height and other posture issues, the app helps reduce the risk of injuries associated with cycling.

## Version history (last 5 releases)

### 1.5.0 — 2026-06-03

New features and improvements included.

• Screen stays on while using the camera — no more accidental lock-outs during fitting
• Redesigned capture guide slides for a clearer, more intuitive experience
• Saddle adjustment guide text now displayed on screen
• Bug fixes and stability improvements

### 1.4.6 — 2026-05-29

Includes general bug fixes and performance improvements.

### 1.4.4 — 2026-05-22

This update features a comprehensive improvement to the posture analysis pipeline for more accurate fitting results.
We fixed joint overlay positioning issues in photo mode and improved the stability of saddle height calculations.
Includes overall performance optimizations and bug fixes.

### 1.4.2 — 2026-05-07

This update improves overall app stability and refines in-app text.
We improved the fitting result and history experience, and fixed issues that occurred in certain cases.

### 1.4.1 — 2025-01-19

You can save and load videos taken within the app.

## Apps similar to Fitter

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Bike Fast Fit EZ](https://appshunter.io/ios/app/bike-fast-fit-ez/id1578925255) | 4.6 (168) | Free | Health & Fitness |
| [ThinkRider](https://appshunter.io/ios/app/thinkrider/id1580538927) | 3.4 (5) | Free | Health & Fitness |
| [XCADEY Utility](https://appshunter.io/ios/app/xcadey-utility/id1281207846) | 2.5 (14) | Free | Health & Fitness |
| [FITLOG](https://appshunter.io/ios/app/fitlog/id1527517502) | 2.2 (11) | Free | Health & Fitness |
| [Shanren Sport](https://appshunter.io/ios/app/shanren-sport/id1211546029) | 2.6 (21) | Free | Health & Fitness |
| [Posture Reminder: Stand Up](https://appshunter.io/ios/app/posture-reminder-stand-up/id1493102391) | 4.4 (235) | Free | Health & Fitness |

## Related topics

[fitter](https://appshunter.io/ios/topics/fitter) · [fitter app](https://appshunter.io/ios/topics/fitter-app) · [fitting](https://appshunter.io/ios/topics/fitting)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-07-18.*