# PopStudy vs Codon One

The clearest difference is rating: PopStudy at 4.9 against Codon One's 4.4. PopStudy also leads on review sentiment (100% vs 76%) and monetization model (ad-supported vs free with in-app purchases). Codon One's advantage is iOS requirement (15.6 vs 18.0). On price, ratings volume, update cadence and ads there is nothing between them.

Both are free to download. PopStudy sells 3 one-off in-app purchases and Codon One sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

PopStudy holds the better App Store score, 4.9 against 4.4. Both are backed by a comparable volume of ratings — 8 and 23 respectively. Written reviews point the same way: 100% of PopStudy's written reviews are positive against 76% of Codon One's.

PopStudy ships an update fortnightly, Codon One every 3 weeks. The most recent releases landed on September 17, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | PopStudy | Codon One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (8 ratings)](https://appshunter.io/ios/app/popstudy-language-learning/id1169672977/reviews)** | [4.4 (23 ratings)](https://appshunter.io/ios/app/codon-one-biology-study/id1517313390/reviews) |
| Number of ratings | 8 | **23** |
| Positive reviews | **100.0% of reviews** | 76.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 145 MB | 252 MB |
| Requires iOS | 18.0 | **15.6** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Longtail Studios](https://appshunter.io/developer/305747913) | [Daniel Gebert](https://appshunter.io/developer/1517313389) |

## What reviewers say

### PopStudy

[App page](https://appshunter.io/ios/app/popstudy-language-learning/id1169672977)

Master any subject with this educational app utilizing a spaced repetition system. Create custom study mixes, engage in personalized sessions, and track your learning progress. Access curated content and study offline on your devices.

**Highlights:** Spaced repetition system, Curated expert content, Customizable study mixes, Personalized daily sessions, Progress tracking, Cross-device syncing, Offline studying

**Features:** Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1-Month Subscription | $7.99 | one-time |
| 3-Month Subscription | $19.99 | one-time |
| 1-Year Subscription | $59.99 | one-time |


### 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 |


## Frequently asked questions

### Is PopStudy free?

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

### Is Codon One free?

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

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

PopStudy is rated higher. PopStudy averages 4.9 out of 5 from 8 ratings, while Codon One averages 4.4 from 23 ratings.

### Do PopStudy or Codon One have ads?

Neither PopStudy nor Codon One shows ads.

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

PopStudy ships an update fortnightly, and Codon One every 3 weeks. Most recently, PopStudy was updated on September 17, 2026 and Codon One on September 8, 2026.

---

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