# Mastering Spectroscopy vs Codon One

The clearest difference is rating: Codon One at 4.4 against Mastering Spectroscopy's 3.3. Codon One also leads on review sentiment (76% vs 40%) and update cadence (every 3 weeks vs every 4 months). Mastering Spectroscopy's advantage is iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Mastering Spectroscopy sells 1 one-off in-app purchase and Codon One sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Codon One holds the better App Store score, 4.4 against 3.3. Both are backed by a comparable volume of ratings — 6 and 23 respectively. Written reviews point the same way: 40% of Mastering Spectroscopy's written reviews are positive against 76% of Codon One's.

Mastering Spectroscopy ships an update every 4 months, Codon One every 3 weeks. Both last shipped on September 8, 2026.

## The numbers

| Metric | Mastering Spectroscopy | Codon One |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.3 (6 ratings)](https://appshunter.io/ios/app/mastering-spectroscopy/id1196400309/reviews) | **[4.4 (23 ratings)](https://appshunter.io/ios/app/codon-one-biology-study/id1517313390/reviews)** |
| Number of ratings | 6 | **23** |
| Positive reviews | 40.0% of reviews | **76.5% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 20 MB | 252 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Onlea Enterprises Inc.](https://appshunter.io/developer/995311636) | [Daniel Gebert](https://appshunter.io/developer/1517313389) |

## What reviewers say

### Mastering Spectroscopy

[App page](https://appshunter.io/ios/app/mastering-spectroscopy/id1196400309)

Practice organic chemistry by analyzing IR, NMR, and mass spectrum data. Identify functional groups and proton types in graphs to build organic compounds.

**Highlights:** Analyze IR, NMR, and mass spectrum data, Identify functional groups, Identify proton types, Build organic compounds, Practice organic chemistry

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| access to all samples | $1.99 | 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 Mastering Spectroscopy free?

Mastering Spectroscopy 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, Mastering Spectroscopy or Codon One?

Codon One is rated higher. Mastering Spectroscopy averages 3.3 out of 5 from 6 ratings, while Codon One averages 4.4 from 23 ratings.

### Do Mastering Spectroscopy or Codon One have ads?

Neither Mastering Spectroscopy nor Codon One shows ads.

### Which is updated more often, Mastering Spectroscopy or Codon One?

Mastering Spectroscopy ships an update every 4 months, and Codon One every 3 weeks. Most recently, Mastering Spectroscopy was updated on September 8, 2026 and Codon One on September 8, 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.*