# Amino Acids OTG vs Biomolecules

The clearest difference is rating: Amino Acids OTG at 5.0 against Biomolecules's 4.0. Biomolecules's advantage is in-app purchases (none vs 2) and update cadence (every 2 weeks vs every 3 months). On price, ratings volume, ads and monetization model there is nothing between them.

Both are free to download. Amino Acids OTG sells 2 in-app purchases, starting at $1.99 per month. Biomolecules asks for nothing beyond the download.

Amino Acids OTG holds the better App Store score, 5.0 against 4.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Amino Acids OTG ships an update every 3 months, Biomolecules every 2 weeks. Both last shipped on November 3, 2026.

## The numbers

| Metric | Amino Acids OTG | Biomolecules |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/amino-acids-otg/id1671412688/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/biomoleculesfunctional-groups/id6446133302/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | Ad-supported | Ad-supported |
| Size | 38 MB | 158 MB |
| Requires iOS | 15.6 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Japality Limited](https://appshunter.io/developer/1574046707) | [Carolina Biological Supply](https://appshunter.io/developer/413708533) |

## What reviewers say

### Amino Acids OTG

[App page](https://appshunter.io/ios/app/amino-acids-otg/id1671412688)

Master amino acids with interactive flashcards and dynamic quizzes. Access comprehensive details, track your progress, and study offline in multiple languages. Customize your learning for focused study sessions.

**Highlights:** Interactive flashcards, Customizable quizzes, Detailed amino acid information, Progress tracking, Multilingual support, Offline access

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (Monthly) | $1.99 | per month |
| Premium (Annual) | $14.99 | per year |


### Biomolecules

[App page](https://appshunter.io/ios/app/biomoleculesfunctional-groups/id6446133302)

Explore the properties and functions of biomolecules with this educational app. It covers basic chemistry topics essential for understanding biological molecules and their processes. This is part of a series designed for anyone interested in general, organic, and biological chemistry.

**Highlights:** Learn basic chemistry topics, Explore biomolecule properties, Understand biomolecule functions, Study general chemistry, Study organic chemistry, Study biological chemistry

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Amino Acids OTG free?

Amino Acids OTG is free to download, with in-app purchases available.

### Is Biomolecules free?

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

### Which has better reviews, Amino Acids OTG or Biomolecules?

Amino Acids OTG is rated higher. Amino Acids OTG averages 5.0 out of 5 from 2 ratings, while Biomolecules averages 4.0 from 1 ratings.

### Do Amino Acids OTG or Biomolecules have ads?

Both Amino Acids OTG and Biomolecules show ads.

### Which is updated more often, Amino Acids OTG or Biomolecules?

Amino Acids OTG ships an update every 3 months, and Biomolecules every 2 weeks. Most recently, Amino Acids OTG was updated on November 3, 2026 and Biomolecules 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.*