# phyphox vs Amino Acid Quiz

The clearest difference is in-app purchases: phyphox at none against Amino Acid Quiz's 1. phyphox also leads on ads (none vs shown) and update cadence (every 3 months vs every 13 months). Amino Acid Quiz's advantage is rating (4.9 vs 4.6) and review sentiment (90% vs 79%). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Amino Acid Quiz sells 1 one-off in-app purchase. phyphox asks for nothing beyond the download.

Amino Acid Quiz holds the better App Store score, 4.9 against 4.6. Both are backed by a comparable volume of ratings — 282 and 1K respectively. Written reviews point the same way: 79% of phyphox's written reviews are positive against 90% of Amino Acid Quiz's.

phyphox ships an update every 3 months, Amino Acid Quiz every 13 months. The most recent releases landed on November 7, 2026 and November 6, 2026 respectively.

## The numbers

| Metric | phyphox | Amino Acid Quiz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (282 ratings)](https://appshunter.io/ios/app/phyphox/id1127319693/reviews) | **[4.9 (1K ratings)](https://appshunter.io/ios/app/amino-acid-quiz/id1301129866/reviews)** |
| Number of ratings | 282 | **1K** |
| Positive reviews | 78.7% of reviews | **90.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 13 months |
| Monetization | **Free** | Free with in-app purchases |
| Size | 19 MB | 100 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [RWTH Aachen University](https://appshunter.io/developer/371466796) | [Atlas Educational Software](https://appshunter.io/developer/1625613074) |

## What reviewers say

### phyphox

[App page](https://appshunter.io/ios/app/phyphox/id1127319693)

Unlock your phone's sensors for scientific exploration. Conduct pre-built experiments or create your own using accelerometers, magnetometers, and more. Analyze and export data in various formats for further study.

**Highlights:** Pre-defined experiments, Data export (CSV, TSV, Excel), Web-based remote control, Custom experiment editor, Access to phone sensors, Advanced analysis functions

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

**In-app purchases:** none

**What reviewers like**

- 💡 Access to phone sensors
- 🔬 Useful for physics experiments
- 📊 Data logging and export
- 🆓 Free and no ads
- 🤔 Sparks curiosity

**What reviewers complain about**

- 🐛 Bugs and crashes
- 📉 Inconsistent performance
- 🔒 App locks/minimizes recording
- ❓ Units not always clear
- ⚠️ Potential for device damage

**Reported bugs**

- App crashes on older devices
- Barometer not working on iOS 17.4
- Network error: Generic error
- Sound measurement curve disappears
- App crashes frequently

**Requested features**

- Add infrasound detector
- More units of measurement (G-force, PSI, feet)
- NFC/RFID support
- In-app bug report feature
- Allow other sensors via USB-C


### Amino Acid Quiz

[App page](https://appshunter.io/ios/app/amino-acid-quiz/id1301129866)

Test and enhance your understanding of the 20 standard amino acids with customizable quizzes. Explore topics like names, structures, codes, codons, and side chain classes. Study all topics for free, with an optional in-app purchase to remove ads.

**Highlights:** Customizable quizzes, 20 standard amino acids, Amino acid names, Structural formulas, 1-Letter and 3-Letter codes, Codons, Side chain classes

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $0.99 | one-time |

**What reviewers like**

- 🚀 Efficient for learning amino acids
- 👍 Clean and user-friendly interface
- 🚀 Helps memorize amino acids quickly
- 👍 Great for MCAT/biochemistry prep
- 👍 Customizable quiz options

**What reviewers complain about**

- 🐛 Incorrect classification of cysteine as non-polar
- 🔍 Missing information on amino acid properties (e.g., pKa, hydrophobicity)

**Reported bugs**

- Arginine (Arg) incorrectly displayed as tyrosine (Tyr) in quiz results

**Requested features**

- Add drawing/structure input mode
- Include 21st amino acid (selenocysteine)
- Add pH-dependent structure visualization
- Implement a continuous/infinite quiz mode


## Frequently asked questions

### Is phyphox free?

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

### Is Amino Acid Quiz free?

Amino Acid Quiz is free to download, with in-app purchases available.

### Which has better reviews, phyphox or Amino Acid Quiz?

Amino Acid Quiz is rated higher. phyphox averages 4.6 out of 5 from 282 ratings, while Amino Acid Quiz averages 4.9 from 1K ratings.

### Do phyphox or Amino Acid Quiz have ads?

Amino Acid Quiz shows ads; phyphox does not.

### Which is updated more often, phyphox or Amino Acid Quiz?

phyphox ships an update every 3 months, and Amino Acid Quiz every 13 months. Most recently, phyphox was updated on November 7, 2026 and Amino Acid Quiz on November 6, 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.*