Comparison

HemocyTap vs Eiro Engage

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

HemocyTap

This application assists in counting cells using a hemocytometer. It calculates cell density, viability, and culture volume, with options to save and export data. Users can track cell evolution over time with visual plots.

Highlights
  • 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
Features
Read full description

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.

About

Eiro Engage

This app compensates adults undergoing depression treatment for completing health tasks. Your participation helps build predictive tools to improve psychiatric care, offering financial rewards for daily check-ins and assessments.

Highlights
  • Daily symptom check-ins
  • Clinically validated assessments
  • Cognitive tasks
  • Treatment logs
  • Financial compensation
  • Data privacy features
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Get paid for documenting your depression treatment journey from your phone. Eiro Engage compensates adults receiving depression treatment for completing health tasks. Your participation helps build the prediction tools needed to end trial-and-error in psychiatric care. --WHAT YOU DO-- Complete available health tasks each day and week, all from the Eiro Engage app: - Daily symptom check-ins tracking depression, anxiety, sleep, appetite, energy, and more - Clinically validated assessments including the PHQ-9, GAD-7, WHO-5, and QIDS-SR16 - Cognitive tasks (Go/No-Go, Effort task) - Treatment logs for medications, therapy sessions, and interventional procedures such as TMS, ECT, and ketamine infusions Tasks are designed to fit into your existing routine. Most take just a few minutes. --WHAT YOU EARN-- Participants can earn upwards of $100 in just minutes per day over a 3-month period. Rewards are redeemable as bank deposits (via Stripe payouts) or Amazon gift cards and are tied directly to task completion. The more consistently you participate, the more you earn. Lifetime rewards are capped at $200. --WHO THIS IS FOR-- Eiro Engage is intended for adults 18 and older in the United States (excluding WA, NV, and MD) who are currently receiving treatment for clinical depression. This includes people on antidepressant or antipsychotic medications, in talk therapy or psychiatric care, or undergoing interventional procedures such as TMS, ECT, or ketamine therapy. To verify you meet our eligibility requirements, you will be asked to complete identity and treatment verification steps. You do not need to be a patient at any specific clinic or health system to participate. --WHY IT MATTERS-- Depression affects hundreds of millions of people worldwide, yet treatment still relies heavily on trial and error. Clinicians have limited tools to predict which medication, therapy, or procedure will work for a given patient, and the cost of that uncertainty falls on patients. Eiro is working to build FDA-regulated predictive tools that can help match patients to effective treatments faster. That work depends on real-world data from people actually living with and being treated for depression. Your participation is not passive. You are a collaborator in building better care. --PRIVACY AND DATA-- Your privacy is built into Eiro's architecture: - Health records from Apple Health are parsed entirely on your device before any data is transmitted - All direct identifiers are stripped and dates are shifted by a random per-user offset - Health data is stored separately from any personal information on our servers Eiro was built with privacy as a foundational design constraint, not an afterthought.   --ABOUT Eiro-- Eiro emerged from work at Vanderbilt University and the Wellcome Leap MCPsych program. The team is developing Software as a Medical Device (SaMD) under FDA regulatory frameworks, with the goal of bringing precision medicine to psychiatric care. --IMPORTANT-- Eiro Engage is a compensated data collection platform. It is not a mental health service, a clinical tool, or a substitute for professional medical care. Nothing in this app constitutes medical advice. Participation does not replace or supplement your treatment. If you are in crisis or experiencing a psychiatric emergency, please call or text 988 (Suicide and Crisis Lifeline) or call 911.

Screenshots

HemocyTap4 screens
Eiro Engage4 screens

Verdict

The call

The clearest difference is price: Eiro Engage at Free against HemocyTap's $1.99. Eiro Engage also leads on rating (5.0 vs 4.5) and update cadence (every 3 days vs every 2 months). HemocyTap's advantage is ratings volume (28 vs 3) and iOS requirement (11.0 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Eiro Engage is free to download; HemocyTap costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Eiro Engage holds the better App Store score, 5.0 against 4.5. That said, the two scores are not equally well evidenced: HemocyTap has 28 ratings behind it against 3, so its average is the more settled of the two.

UpkeepUpdate frequency

HemocyTap ships an update every 2 months, Eiro Engage every 3 days. The most recent releases landed on October 4, 2026 and October 14, 2026 respectively.

Scorecard6 real differences · 4 level
HemocyTap versus Eiro Engage: the parameters behind the verdict, then further details
ParameterHemocyTapEiro Engage
Price$1.99Free — better
Rating4.5 (28 ratings)5.0 (3 ratings) — better
Positive reviews50.0% of reviews—
Number of ratings28 — better3
Update frequencyEvery 2 monthsEvery 3 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPod — betteriPhone
Requires iOS11.0 — better18.0
Further details — not scored
Size6 MB22 MB
Age rating4+17+
DeveloperRaul GarciaEiro Inc

Customer experience

HemocyTap

All ratings28 ratings
Positive82.1%
Neutral14.3%
Negative3.6%
Written reviews12 reviews
Positive50.0%
Neutral33.3%
Negative16.7%

Eiro Engage

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

HemocyTap

No in-app purchases

None

Eiro Engage

No in-app purchases

Questions

Is HemocyTap free?
HemocyTap costs $1.99, with no in-app purchases.
Is Eiro Engage free?
Eiro Engage is free to download, with no in-app purchases.
Which has better reviews, HemocyTap or Eiro Engage?
Eiro Engage is rated higher. HemocyTap averages 4.5 out of 5 from 28 ratings, while Eiro Engage averages 5.0 from 3 ratings.
Do HemocyTap or Eiro Engage have ads?
Neither HemocyTap nor Eiro Engage shows ads.
Which is updated more often, HemocyTap or Eiro Engage?
HemocyTap ships an update every 2 months, and Eiro Engage every 3 days. Most recently, HemocyTap was updated on October 4, 2026 and Eiro Engage on October 14, 2026.

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