# Codon One vs HistoLogic

The clearest difference is rating: HistoLogic at 5.0 against Codon One's 4.5. HistoLogic also leads on in-app purchases (none vs 7) and review sentiment (100% vs 76%). Codon One's advantage is ratings volume (24 vs 5). On price, ads and device support there is nothing between them.

Both are free to download. Codon One sells 7 one-off in-app purchases. HistoLogic asks for nothing beyond the download.

HistoLogic holds the better App Store score, 5.0 against 4.5. Both are backed by a comparable volume of ratings — 24 and 5 respectively. Written reviews point the same way: 76% of Codon One's written reviews are positive against 100% of HistoLogic's.

Codon One ships an update every 3 weeks, HistoLogic every 9 days. The most recent releases landed on October 10, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | Codon One | HistoLogic |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (24 ratings)](https://appshunter.io/ios/app/codon-one-biology-study/id1517313390/reviews) | **[5.0 (5 ratings)](https://appshunter.io/ios/app/histologic/id1565167408/reviews)** |
| Number of ratings | **24** | 5 |
| Positive reviews | 76.5% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 277 MB | 76 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Daniel Gebert](https://appshunter.io/developer/1517313389) | [OSF Healthcare System](https://appshunter.io/developer/1053621635) |

## What reviewers say

### Codon One

[App page](https://appshunter.io/ios/app/codon-one-biology-study/id1517313390)

Master molecular biology, genetics, evolution, and life chemistry through interactive modules and quizzes. Explore essential concepts with clear diagrams and concise explanations. Includes helpful tools for sequence analysis and genetic code reference.

**Highlights:** Interactive learning modules, Quick quizzes for comprehension, Clear diagrams and plain language, Molecule reference guide, Sequence analysis tools, Genetic code exploration

**Features:** Family Sharing, Vision Pro support

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Module 1: Chemistry of Life | Free | one-time |
| Module 2: Genetics | $2.99 | one-time |
| Module 3: Evolution | $2.99 | one-time |
| Module 4: Science History | $2.99 | one-time |
| Module 5: Cell Biology | $2.99 | one-time |
| Module 6: Development | $2.99 | one-time |
| Unlock All | $8.99 | one-time |


### HistoLogic

[App page](https://appshunter.io/ios/app/histologic/id1565167408)

Learn tissue microscopy with high-quality images and detailed descriptions. Test your knowledge with multiple-choice quizzes in various game modes, including timed challenges and high-difficulty tests.

**Highlights:** Hundreds of histology images, Low and high magnification toggling, Detailed cell and tissue outlines, Explore mode for organ examination, Time Trial quiz mode, Hot Streak challenging mode, Randomized question order

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Codon One free?

Codon One is free to download, with in-app purchases available.

### Is HistoLogic free?

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

### Which has better reviews, Codon One or HistoLogic?

HistoLogic is rated higher. Codon One averages 4.5 out of 5 from 24 ratings, while HistoLogic averages 5.0 from 5 ratings.

### Do Codon One or HistoLogic have ads?

Neither Codon One nor HistoLogic shows ads.

### Which is updated more often, Codon One or HistoLogic?

Codon One ships an update every 3 weeks, and HistoLogic every 9 days. Most recently, Codon One was updated on October 10, 2026 and HistoLogic on October 11, 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.*