# Codon One vs GISP Prep

The clearest difference is in-app purchases: GISP Prep at none against Codon One's 7. Codon One's advantage is device support (3 vs 1) and iOS requirement (15.6 vs 17.0). On price and ads there is nothing between them.

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

## The numbers

| Metric | Codon One | GISP Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (25 ratings)](https://appshunter.io/ios/app/codon-one-biology-study/id1517313390/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 76.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Monetization | Free with in-app purchases | — |
| Size | 277 MB | 3 MB |
| Requires iOS | **15.6** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Daniel Gebert](https://appshunter.io/developer/1517313389) | [Eric Vaz](https://appshunter.io/developer/1863591880) |

## 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 2: Genetics | Free | one-time |
| Module 1: Chemistry of Life | Free | 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 |


### GISP Prep

[App page](https://appshunter.io/ios/app/gisp-prep-gis-exam-practice/id6785084756)

**In-app purchases:** none


## Frequently asked questions

### Is Codon One free?

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

### Is GISP Prep free?

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

### Do Codon One or GISP Prep have ads?

Neither Codon One nor GISP Prep shows ads.

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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.*