# Amino Acid Guide

> Educational tool for learning and quizzing amino acid properties and structures. (iPhone/iPad app by Axton Pitt.)

- Source: https://appshunter.io/ios/app/amino-acid-guide/id957165646 (this page in markdown: same URL + `.md`)
- Developer: [Axton Pitt](https://appshunter.io/developer/957165645)
- Category: Education, Utilities
- Price: Free with in-app purchases
- Rating: 3.64/5 from 14 App Store ratings · 13 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.0 · 83 MB
- Languages: English, French, Korean, Chinese
- Released: 2015-01-24
- Data updated: 2026-06-01
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/amino-acid-guide/id957165646/reviews.md

## What is Amino Acid Guide?

Learn, Quiz, Repeat.
- This is a great tool if you are just starting out and need to learn about amino acids, or if you have lots of experience and want a handy reference with you wherever you go.

Learn:
- Browse through each amino acid and learn about its specific properties. Use the provided diagrams to learn the functional group structure of all 20 amino acids. 
- There are many data points available from Codons and Polarity, to Molar Mass and Density.
- 3D animated Ball and Stick, and Space Filling models; 2D Structure, Simplified and Functional Group images, help you learn the chemical structure of each amino acid.

Quiz:
- Test what you have learnt wherever you are.
- 8 quiz types (more coming): 2D structure, Functional group, Three letter code, Single letter code, Polarity, Essential, Simplified structure and Everything.
- Includes a free set of questions, then an In-App Purchase unlocks unlimited questions.

iPad:
- Multitask! Take advantage of slide-over and split-view multitasking on compatible iPad models.
- This lets you look at your notes from class while you quiz your knowledge.

Apple Watch:
- Learn everything about amino acids, right on your wrist.
- Daily Amino Acid, a fun Glance to see a new amino acid every day and keep you motivated to learn.

Follow us on Twitter at @aminoacidguide or facebook.com/aminoacidguide for updates.

## Key features

- Browse amino acid properties
- 3D animated and 2D structural models
- Multiple quiz types
- iPad multitasking support
- Apple Watch daily learning feature
- Detailed data points (Codons, Polarity, etc.)

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Quiz | $2.99 | one-time |


## Recent user reviews (10 of 13)

All indexed reviews: https://appshunter.io/ios/app/amino-acid-guide/id957165646/reviews.md

### 5/5 — Very beautiful

*2023-03-13, version 1.6.1*

Comprehensive and concise information

### 1/5 — Terrible app, don’t bother downloading this

*2019-01-20*

I downloaded this app because it offered 3D structure revision of amino acids which makes it stand out from other apps and suits my needs. However, upon using the app, none of the 3D structures actually appear and they do no appear to be part of the “paid” package. Therefore, this app is not worth the bother.

**Developer response:** Hi there, I have released an update that fixed this issue.

### 4/5 — Great

*2017-07-13, version 1.4*

I really like the easy accessibility of this app. It's simple and has the properties of each AA (polarity, structure, letter codes, etc.) It even tells you if it's an essential AA and includes the codons for it. Overall, it's great for reviewing the AAs and for quick access information on them. !!

### 3/5 — Language

*2017-04-06, version 1.4*

Can you make a option that can switch the language of the namings?

### 1/5 — Will not start

*2016-09-01, version 1.4*

App does not launch

### 1/5 — App glitches

*2016-08-31, version 1.4*

The app is built to have two pains in the quiz section. The left side is to choose which quiz you want to take. The right is the actual quiz. However, if you leave the app mid quiz and then come back and select a different quiz, the second quiz opens up in the left pane. From there, you can't shut the two quizzes down to get back to the quiz selection menu on the left. The only work around is to clear the iPad memory and reopen the app, something that is unacceptable.

### 1/5 — Have to pay

*2016-03-03*

You have to pay to do the quizzes which I think is awful.

### 3/5 — Crashes

*2016-02-03, version 1.3.1*

Unlocked quiz; now app won't open. Even after reinstalling it, it still crashes. Please fix or refund the 2.99.

### 4/5 — Great but needs harder quizzes

*2015-10-18, version 1.3*

It's a great looking, easy to use app. It provides good details on the basics. I wish they had quizzes for them. The quizzes focus on the structure and names. I wish they quizzed on pkas, mass, etc.

### 5/5 — Extremely detailed

*2015-09-15, version 1.2.1*

No requirement unlock anything for the Amino Acid information.
Polarity, Acidity, pKa with 3-4 significant figures are all included with 5 different variation forms of each of the 20 common amino acids. 

The only in-app purchase is the more quizzes that goes into detail ($2.99)

## Frequently asked questions about Amino Acid Guide

### What is Amino Acid Guide?

Amino Acid Guide is an educational application designed to help users learn and test their knowledge of amino acids. It provides detailed information, structural models, and various quiz formats to facilitate learning.

### What learning methods does Amino Acid Guide use?

Amino Acid Guide utilizes a learn, quiz, and repeat methodology. Users can browse through detailed information on each amino acid, view structural diagrams and 3D models, and then test their comprehension through multiple quiz types.

### Does Amino Acid Guide offer progress tracking?

While the description highlights various quiz types and learning modules, it does not explicitly mention a dedicated progress tracking feature. Users can gauge their learning through the quiz results.

### Can I get certified with Amino Acid Guide?

The application focuses on learning and quizzing amino acid knowledge. It does not appear to offer any formal certifications upon completion of its modules or quizzes.

### How often is Amino Acid Guide updated?

The latest version of Amino Acid Guide is 1.6.1, last updated on March 17, 2019. This indicates that updates may not be very frequent.

### What devices support Amino Acid Guide?

Amino Acid Guide is available on a range of Apple devices, including iPhone, iPad, iPod, and Apple Watch, supporting features like iPad multitasking and Apple Watch Glances.

### Does Amino Acid Guide have ads?

No, Amino Acid Guide does not contain advertisements. The application is free to download and use, with optional in-app purchases for unlimited quiz questions.

### What are the in-app purchases for Amino Acid Guide?

The primary in-app purchase for Amino Acid Guide unlocks unlimited questions for all quiz types. A free set of questions is available initially.

## Version history (last 5 releases)

### 1.6.1 — 2019-03-17

– Fix issue with viewing quiz images on smaller devices.

### 1.6 — 2019-03-15

- Fixed missing videos on iOS 12.

### 1.5.1 — 2017-10-14

– Fixed missing functional group images for Alanine and Arginine.
– Fixed bug with opening the 2D Structure (All) Quiz.
– Updated launch screen.
– Removed support for iOS 8.

### 1.5 — 2017-10-12

– Fix for 3D Touch crash on iOS 8.

### 1.4 — 2016-08-25

– New quiz types! More variants for 2D Structure and Functional group quizzes, plus a new Simplified structure mode and an Everything quiz. So now you can more fully test your knowledge.
– 3D Touch added, you can now Peek and Pop into the amino acids and quizzes, or quickly access quizzes from the home screen.

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## More apps by Axton Pitt

- [Protein Guide](https://appshunter.io/ios/app/protein-guide/id1375157917)

All apps by Axton Pitt: https://appshunter.io/developer/957165645

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*