# CellAtlas vs Protozoan Identification

The clearest difference is review sentiment: CellAtlas at 84% against Protozoan Identification's 0%. CellAtlas also leads on rating (3.2 vs 2.0) and update cadence (every 2 months vs every 15 months). Protozoan Identification's advantage is iOS requirement (13.0 vs 15.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

CellAtlas holds the better App Store score, 3.2 against 2.0. That said, the two scores are not equally well evidenced: CellAtlas has 22 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 84% of CellAtlas's written reviews are positive against 0% of Protozoan Identification's.

CellAtlas ships an update every 2 months, Protozoan Identification every 15 months. The most recent releases landed on October 19, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | CellAtlas | Protozoan Identification |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.2 (22 ratings)](https://appshunter.io/ios/app/cellatlas/id413226907/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/protozoan-identification/id506715288/reviews) |
| Number of ratings | **22** | 1 |
| Positive reviews | **84.3% of reviews** | 0.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 months** | Every 15 months |
| Monetization | Free | Free |
| Size | 106 MB | 221 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [CellaVision](https://appshunter.io/developer/1185675201) | [Carolina Biological Supply](https://appshunter.io/developer/413708533) |

## What reviewers say

### CellAtlas

[App page](https://appshunter.io/ios/app/cellatlas/id413226907)

Explore blood cell morphology with expert-written lectures and a vast image database. Test your knowledge with an engaging quiz game designed for efficient learning.

**Highlights:** Blood cell morphology guide, Expert-written mini lectures, Extensive cell image database, CellQuiz game, Knowledge testing

**Features:** Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Great for learning morphology
- 👍 Helpful study tool
- 👍 Fun quiz format
- 👍 Easy to navigate
- 👍 Good for review

**What reviewers complain about**

- ⏰ Ridiculous timer
- ⏰ Too little time
- ⏰ Timer causes mistakes
- ⏰ Timer prevents practice
- 🐛 Quiz is broken/rigged

**Reported bugs**

- Timer is too short
- Quiz moves too slowly after correct answer
- Duplicate images that only one counts
- App not opening on some devices
- Missing WBCs

**Requested features**

- Remove timer option
- Untimed mode
- More time for quizzes
- Quizzes for specific cells/sections
- More images/examples


### Protozoan Identification

[App page](https://appshunter.io/ios/app/protozoan-identification/id506715288)

Explore a collection of protozoan images and videos. Features an interactive key, labeling activities, and practice exercises to aid in identification and study.

**Highlights:** Interactive dichotomous key, Labeling activities, Protozoan images and videos, Practice exercises, Study aids

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is CellAtlas free?

CellAtlas is free to download, with no in-app purchases.

### Is Protozoan Identification free?

Protozoan Identification is free to download, with no in-app purchases.

### Which has better reviews, CellAtlas or Protozoan Identification?

CellAtlas is rated higher. CellAtlas averages 3.2 out of 5 from 22 ratings, while Protozoan Identification averages 2.0 from 1 ratings.

### Do CellAtlas or Protozoan Identification have ads?

Neither CellAtlas nor Protozoan Identification shows ads.

### Which is updated more often, CellAtlas or Protozoan Identification?

CellAtlas ships an update every 2 months, and Protozoan Identification every 15 months. Most recently, CellAtlas was updated on October 19, 2026 and Protozoan Identification on October 12, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*