# DIY Bike Fit — Cycling posture & joint angles

> Cycling posture & joint angles (iPhone/iPad app by Olga Joana Smitaite.)

- Source: https://appshunter.io/ios/app/diy-bike-fit/id6800860619 (this page in markdown: same URL + `.md`)
- Developer: [Olga Joana Smitaite](https://appshunter.io/developer/6800860621)
- Category: Health & Fitness, Sports
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 32 MB
- Languages: American English
- Released: 2026-09-04
- Data updated: 2026-10-08

## What is DIY Bike Fit?

Check your riding position with one photo.

DIY Bike Fit turns a single side-on photo of you on the bike into six joint angle readings, each compared against the range bike fitters work to. No sensors, no appointment, no account.

HOW IT WORKS
1. Photograph - take a side-on photo, or pick one from your library.
2. Detect - on-device pose detection maps your joints automatically.
3. Correct - drag any point to place it exactly; pinch to zoom in close.
4. Read - see all six angles with an in-range or out-of-range verdict.

WHAT IT MEASURES
Knee - the primary saddle-height indicator. Too straight suggests the saddle is high, too bent suggests it is low.
Hip and Back - how far forward and how low you sit over the bars.
Elbow and Shoulder - your reach and cockpit position.
Foot - foot angle at the pedal.

Every reading gets a range bar showing the recommended band, where you fall within it, and how far outside it you are if you are out.

CHANGE SOMETHING, CHECK AGAIN
Drop the saddle a few millimetres, take another photo, compare. There is no cap on how many photos you can measure, so you can work in small steps instead of guessing.

WHEN THE DETECTION IS OFF
Automatic pose detection is not always exact. Every joint is a draggable point you can reposition, and the photo zooms and pans so you can place each one precisely. Saving re-runs all six measurements.

YOUR PHOTOS STAY ON YOUR PHONE
Analysis runs entirely on your device. Your photos are never sent to a server, and nothing is kept between sessions.

BEFORE YOU DOWNLOAD
Built for drop-bar bikes only - road, gravel and cyclocross.
You will need a photo of yourself on the bike taken from the side, with the near pedal at the bottom of the stroke and your whole body and bike in frame.

Results are for guidance only. If you have pain or persistent discomfort, see a professional bike fitter.

## Is DIY Bike Fit safe?

Not enough ratings yet to assess DIY Bike Fit.

## Is DIY Bike Fit legit?

DIY Bike Fit has limited verification signals. The AppsHunter Legitimacy Score for DIY Bike Fit is 58 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-09-05

No release notes.

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| --- | --- | --- | --- |
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| [RoadFitter: Live Bike Fit](https://appshunter.io/ios/app/roadfitter-live-bike-fit/id6792840910) | — | Free | Health & Fitness |
| [Saddle Height Calculator: PP](https://appshunter.io/ios/app/saddle-height-calculator-pp/id6751107929) | — | Free | Health & Fitness |

## Related topics

[bike fit performance](https://appshunter.io/ios/topics/bike-fit-performance)

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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 2026-10-08.*