# HemocyTap — Hemocytometer cell counting

> Hemocytometer cell counting, density, viability, and culture volume calculator. (iPhone/iPad app by Raul Garcia.)

- Source: https://appshunter.io/ios/app/hemocytap/id617767138 (this page in markdown: same URL + `.md`)
- Developer: [Raul Garcia](https://appshunter.io/developer/617767141)
- Category: Medical, Utilities
- Price: $1.99
- Rating: 4.50/5 from 28 App Store ratings · 12 written reviews indexed
- Age rating: 4+
- Requires: iOS 11.0 · 6 MB
- Languages: American English
- Released: 2013-03-20
- Data updated: 2026-08-30
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/hemocytap/id617767138/reviews.md

## What is HemocyTap?

HemocyTap is the perfect companion to count cells using a hemocytometer. Count live & dead cells, calculate the cell density, viability & new culture volume, save and send your data via email and plot the evolution over time! 

Do your thumbs get tired after tally-counting cells? 
Do you feel stupid when you miss the button of the calculator and you have to start all over again? 
Do you wish you could have all your counts in a .csv file without typing them yourself? And have it sent instantaneously via email? 

Keep reading. 

HemocyTap is your hemocytometer app! This is what it can do to make your life easier: 

Counting: 
•use two tally counters, one for live cells and one for dead cells 
•each makes a different sound so that you know you pressed the correct one 
•keeps track of all the cells you have counted in each square 
•change the square you’re counting just as you change the square you see in the microscope 
•set the number of squares you want to count by default – they will appear highlighted 
•choose to count the big squares or the small squares inside the central square
•*NEW!* Long tap to unselect a square to count

Calculating: 
•calculates the average of your counts for you 
•gives you the volume you need to add to obtain the desired cell density when subculturing
•displays cell viability and live cell number 
•you only have to provide the original volume of your culture, the desired cell density and the dilution 
•*NEW!* Choose μL or mL units
•*NEW!* Supports decimal dilutions

Exporting: 
•Email instantaneously your counts in csv files 
•Single counts or bulk experiment data 
•Export to other iOS devices with HemocyTap: share counts with lab colleagues or keep it as a backup in case you accidentally delete your file. 

Viewing and analysing:
•Features a plot option to keep track of how well your culture is performing 
•Move counts between folders
•Plots your viability and live cells over time! 
•Keep track of cell doubling times between counts
•Access previous counts and check the latest cell numbers of your culture and delete any unwanted counts 

Other new features:
•*NEW!* Now supports iOS 11
•*NEW!* Timer to keep track of other lab tasks

Disclaimer: This app is intended purely for educational purposes. Do not use it for medical diagnosis.

## Key features

- Live and dead cell counting with tally counters
- Automatic calculation of cell density and viability
- New culture volume calculation
- Data export via email in CSV format
- Plotting cell evolution over time
- Timer for lab tasks

## Recent user reviews (10 of 12)

All indexed reviews: https://appshunter.io/ios/app/hemocytap/id617767138/reviews.md

### 3/5 — Hematology friendly??

*2024-10-19*

I would love to be able to use this in my department, however I would need to be able to change the counting squares to 9. Would it be possible to allow the user to count all 9 squares? Additionally, allowing the user to change the name of the counting buttons from live and dead to wbc and rbc would be nice too.

### 5/5 — Perfect for cell culture

*2023-11-23*

This app is perfect for cell culture experiments. It shows you perfect viability, total number of cells used, allows you to modify the dilution factor used and most importantly, count your cells based on distinct sound between live and dead. It has helped me a lot during my experiments. It also has different modes to plot the growth of your cells and save your work and export it. An amazing little app and well worth the money.

### 5/5 — Love it

*2022-11-11*

I’ve been using this app for a few years now. More so now. It is very simple, but has all the features. And the best thing is you can save your cell counts, and make different folders for them. Makes it easy to go back if you need to.

### 5/5 — There is room for improvement but I like it

*2019-06-07*

I use it to count algae cells. It works. Saves me a bit of time.

### 3/5 — Handy app but resolution problems

*2019-02-07, version 3.2.1*

Would it be possible to fix/update the app to the new iPhone XR/XS resolutions?

### 5/5 — Dilution calculation bug

*2018-10-23*

There seems to be a bug when calculating live cell density from total cell count and viability above a certain dilution. At 1:100 the live cell density is accurate. On the same count it is inaccurate at 1:500 and 1:1000. Love the app otherwise.

### 2/5 — wish there was more customizability

*2015-07-20*

I downloaded this to use in cell culture as my lab is new and doesn't have a clicker. This is the best of the apps ive found as far as having a nice "click" sound and having a big button that makes it easy to count with while looking through the microscope (also tried zappy and invitrogen free apps). However, the lack of true customizability is irritating and caused me to plate 5 x more cells than I should have this weekend. The fact that you have to count all five squares to use the dilution calculator and it averages that is annoying. I want to count just one big square, the middle one, and have it give me the cell density based on that, not on some pre-selected sub-square. Please make the app so I can tell it exactly which squares I'm counting while I'm inside the counter, rather than hidden behind settings, and not even allowing for full customization.

**Developer response:** We are very sorry you found issues while using the app. Here are some more details on how you can customize it to use it for your particular application: if you only want to count the middle square, you should un-highlight all others in settings. In addition, if you only want to count one chamber, change the # chambers settings to one. Please get in touch via email: hemocytap@gmail.com if you have further questions

### 3/5 — Neat idea, not for all applications

*2014-09-06*

Maybe this is brewer specific. I tried using it to count granulated leucocytes in a veterinary lab and it fell short. I could not make it register all 9 primary squares. It doesn't have an alarm (that I could find) to allert you when you've hit a specified number of cells, In my case I want to know when I've hit 100 without having to look up from the scope.  I don't need the dead cell counter but it is usefull for counting the cells on the grid on the other side of the slide.
I did find it a good alternative to give my thumb a rest from the standard counter.

### 5/5 — Great New Updates

*2014-05-07*

If you are a brewer and counting yeast cells this app is now for you. The updates allow you to count the center square and is preset to calculate in that mode. This app not only makes cell counting easier by keeping track of your live and dead cells but does the calculations for you while storing your data and easily exporting it via an email attachment that opens in Excel. It also calculates final volume for a target density making pitching rate calculation a breeze. A word of caution: HemocyTap calculations assume you have made sample to diluent ratios, not sample to total. So for example if you make a 1:10 dilution by adding 1 ml of your sample to 9 ml of diluent you would set your dilution ratio to 1:9 the get the correct cells/ml count.

### 3/5 — Good app, but would like a bit more.

*2014-01-05*

I use this to count yeast for brewing. I only use the center square for counting. I would love to be able to pick the little squares inside of that center square to track my counts. Overall th app works great and I prefer over a manual counter.

**Developer response:** Thanks for the feedback! The latest version of the app allows you to customize it to count yeast cells: change the setting "Square type" to "center", and then pick the squares in the center. Please get in touch via email: hemocytap@gmail.com if you have further questions.

## Frequently asked questions about HemocyTap

### What is HemocyTap used for?

HemocyTap is designed to help users count cells using a hemocytometer. It calculates cell density, viability, and the required volume for new cultures, and allows for data export and tracking over time.

### Does HemocyTap have ads?

No, HemocyTap does not contain advertisements. It is a paid application that offers a focused experience without interruptions.

### What is the price of HemocyTap?

HemocyTap is available for a one-time purchase of $1.99. This price grants full access to all its features.

### What devices does HemocyTap support?

HemocyTap is compatible with iPhone and iPod devices. It requires iOS 11 or later.

### How often is HemocyTap updated?

The latest version of HemocyTap, 3.2.1, was released on January 15, 2018. While updates have not been frequent recently, the app is stable for its intended purpose.

### What is the age rating for HemocyTap?

HemocyTap has an age rating of 4+, making it suitable for a wide range of users. It is intended for educational purposes and not for medical diagnosis.

### Can I share my cell counts with colleagues using HemocyTap?

Yes, HemocyTap allows you to email your counts in CSV files, either as single counts or bulk experiment data. You can also export to other iOS devices, facilitating collaboration with lab colleagues.

### What kind of data can HemocyTap track over time?

HemocyTap can plot the evolution of your cell culture over time, specifically tracking viability and live cell numbers. It also helps in keeping track of cell doubling times between counts.

## Version history (last 5 releases)

### 3.2.1 — 2018-01-15

This update from Apple will improve the functionality of this app. No new features are included.

Fixed counts not clearing when pressing the 'Clear' button.

### 3.2 — 2017-11-20

Fixed bug that prevented users from deleting counts

### 3.1 — 2017-11-07

Bug fixes for email export

### 3.0 — 2017-09-19

- Now supports iOS 11
- Supports μL and mL units
- Supports decimal dilutions
- Long tap to unselect a square to count
- New timer to keep track of other lab tasks

### 2.0 — 2014-02-17

• Now supports iOS 7 and iOS 6
• Choose to count the big squares or the small squares inside the central square
• Export to other devices with HemocyTap: share counts with lab colleagues or keep it as a backup in case you accidentally delete your file. 
• Keep track of cell doubling times between counts
• Choose to skip the alert messages (you know what you’re doing)
• Move counts between folders
• Info button: get help on the options in each screen

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## Related topics

[hemocytometer](https://appshunter.io/ios/topics/hemocytometer)

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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 2026-08-30.*