# Colony Counter: CFU Calculator — Count colonies from a photo.

> Count colonies from a photo. (iPhone/iPad app by Chan-Young Park.)

- Source: https://appshunter.io/ios/app/colony-counter-cfu-calculator/id6823961586 (this page in markdown: same URL + `.md`)
- Developer: [Chan-Young Park](https://appshunter.io/developer/6823961588)
- Category: Education, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 36 MB
- Languages: American English, Korean
- Released: 2026-10-26
- Data updated: 2026-10-29

## What is Colony Counter?

Colony Counter counts colonies on lab plates from a photo. Take a picture or pick one from your library and the count appears in seconds, with every counted colony painted on the photo so you can check it at a glance.

What it counts
• LB plate colonies: bacterial colonies such as E. coli, with CFU/mL and transformation efficiency
• Crystal violet colonies: stained cell colonies in dishes, 6/12/24-well plates and flasks, with plating efficiency and surviving fraction
• Zebrafish embryo survival: live and dead embryos counted separately, with the survival rate

Features
• Automatic plate and well detection, adjustable with a finger
• Touching colonies are split; dense clusters are estimated from their area
• Tap to add or remove a colony, with undo
• Count many photos at once and see a per-photo table
• Enter the dilution and plated volume to get CFU/mL
• Keep a log, copy or save it as CSV, and save the marked result image
• English and Korean

Privacy
All analysis runs on your device. Photos and results are never uploaded, and there are no accounts, ads or tracking.

## Is Colony Counter safe?

Not enough ratings yet to assess Colony Counter.

## Is Colony Counter legit?

Colony Counter: CFU Calculator has limited verification signals. The AppsHunter Legitimacy Score for Colony Counter is 50 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-10-27

No release notes.

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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 2026-10-29.*