# Kharty vs Codon One

The clearest difference is ads: Codon One at none against Kharty's shown. Kharty's advantage is update cadence (every 3 days vs every 3 weeks) and rating (4.8 vs 4.5). On price, in-app purchases, monetization model and device support there is nothing between them.

Both are free to download. Kharty sells 9 in-app purchases, starting at $3.99 per month and Codon One sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Kharty holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Kharty has 205 ratings behind it against 25, so its average is the more settled of the two. Written reviews point the same way: 95% of Kharty's written reviews are positive against 76% of Codon One's.

Kharty ships an update every 3 days, Codon One every 3 weeks. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Kharty | Codon One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (205 ratings)](https://appshunter.io/ios/app/kharty-educational-quiz-game/id1186133554/reviews)** | [4.5 (25 ratings)](https://appshunter.io/ios/app/codon-one-biology-study/id1517313390/reviews) |
| Number of ratings | **205** | 25 |
| Positive reviews | **95.2% of reviews** | 76.5% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 days** | Every 3 weeks |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 84 MB | 277 MB |
| Requires iOS | **15.1** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Kharty LLC](https://appshunter.io/developer/1186133553) | [Daniel Gebert](https://appshunter.io/developer/1517313389) |

## What reviewers say

### Kharty

[App page](https://appshunter.io/ios/app/kharty-educational-quiz-game/id1186133554)

Transform learning into an engaging game by quizzing yourself on maps and diagrams. Create custom study materials or explore a vast catalog. Master subjects through a progressive learning method, track your progress, and challenge others.

**Highlights:** Create custom diagrams, Multiple game modes, Progressive learning method, Track best records, Dictation of terms, Share creations, Offline study

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kharty + Monthly (Student) | $3.99 | per month |
| Kharty + Monthly (Teacher) | $3.99 | per month |
| Kharty PRO Monthly (Teacher) | $19.99 | per month |
| Kharty + Annual (Teacher) | $29.99 | per year |
| Kharty + Annual (Student) | $29.99 | per year |
| Kharty PRO Annual (Teacher) | $149.99 | per year |
| 3 AI Khartys | $2.99 | one-time |
| 10 AI Khartys | $6.99 | one-time |
| 25 AI Khartys | $14.99 | one-time |

**What reviewers like**

- 📚 Excellent for learning
- 🎮 Fun and engaging gameplay
- 💡 Educational and didactic
- 📱 Intuitive and easy to use
- 🆓 Free to use

**What reviewers complain about**

- 🐛 Premium version issues
- 📱 iPhone 15 compatibility issues
- ❌ Can't add students
- ❓ Inconsistent study criteria
- 🌍 Missing country in list

**Reported bugs**

- Premium version performs worse
- App doesn't dictate terms
- Timer malfunctions
- App stops functioning well mid-study
- Cannot search on iPhone 15

**Requested features**

- Add more languages (especially Portuguese)
- Add mathematics content
- Wider study criteria
- Time limit or study schedule
- Quick review option


### 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 |


## Frequently asked questions

### Is Kharty free?

Kharty 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, Kharty or Codon One?

Kharty is rated higher. Kharty averages 4.8 out of 5 from 205 ratings, while Codon One averages 4.5 from 25 ratings.

### Do Kharty or Codon One have ads?

Kharty shows ads; Codon One does not.

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

Kharty ships an update every 3 days, and Codon One every 3 weeks. Most recently, Kharty was updated on November 2, 2026 and Codon One on November 3, 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.*