# Diff Counter — Cell Counter

> Mobile tool for counting white blood cells during blood differential analysis. (iPhone/iPad app by Josh Jamerson.)

- Source: https://appshunter.io/ios/app/diff-counter/id1439521172 (this page in markdown: same URL + `.md`)
- Developer: [Josh Jamerson](https://appshunter.io/developer/1439521171)
- Category: Education, Utilities
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings
- Age rating: 4+
- Requires: iOS 11.4 · 9 MB
- Languages: American English
- Released: 2018-10-19
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/diff-counter/id1439521172/reviews.md

## What is Diff Counter?

Allows users to keep a count of white blood cells while doing a blood differential.  Tapping the images of the corresponding cell types will increment the counter and update a running percentage.  Upon reaching a count of 100, the app will play an alert sound to indicate that the count is complete.

The undo button allows users to remove input errors as many times as necessary.  The reset button will reset all values back to zero.

## Key features

- White blood cell counting
- Blood differential analysis
- Real-time percentage updates
- Alert sound upon completion
- Undo button for errors
- Reset function


## Frequently asked questions about Diff Counter

### What is the primary function of Diff Counter?

Diff Counter allows users to accurately count white blood cells while performing a blood differential. It helps track the counts of different cell types and displays their running percentages.

### How does Diff Counter notify users when a count is complete?

Upon reaching a total count of 100 cells, Diff Counter plays an alert sound to signal that the differential count is finished.

### Can I correct mistakes made while counting with Diff Counter?

Yes, Diff Counter includes an undo button that allows users to remove input errors as many times as needed, ensuring accuracy in their counts.

### What devices is Diff Counter compatible with?

Diff Counter is available for iPhone, iPad, and iPod devices, making it accessible on a range of Apple mobile hardware.

### How often is Diff Counter updated?

Diff Counter was last updated on October 19, 2018, with version 1.0. It has not received updates since its initial release.

### What is the age rating for Diff Counter?

Diff Counter has an age rating of 4+, indicating it is suitable for users of all ages and does not contain mature content.

### Does Diff Counter offer any certifications or formal learning modules?

Diff Counter is a tool for counting cells and does not provide formal learning modules or certifications. Its purpose is to assist in the practical task of blood differential analysis.

### What is the user sentiment for Diff Counter based on its ratings?

Diff Counter has received a perfect 5.0-star rating from 2 reviews, suggesting a very positive user experience and satisfaction with its functionality.

## Version history (last 1 release)

### 1.0 — 2018-10-19

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 2026-06-10.*