# Functional Groups in Chemistry vs Atomas

The clearest difference is price: Atomas at Free against Functional Groups in Chemistry's $0.99. Atomas also leads on rating (4.8 vs 3.6) and review sentiment (94% vs 52%). Functional Groups in Chemistry's advantage is chart position (#74 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Atomas is free to download; Functional Groups in Chemistry costs $0.99 up front. Functional Groups in Chemistry sells 2 one-off in-app purchases and Atomas sells 5 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Atomas holds the better App Store score, 4.8 against 3.6. That said, the two scores are not equally well evidenced: Atomas has 3.4K ratings behind it against 5, so its average is the more settled of the two. Written reviews point the same way: 52% of Functional Groups in Chemistry's written reviews are positive against 94% of Atomas's.

Functional Groups in Chemistry ships an update every 23 months, Atomas monthly. Both last shipped on November 1, 2026.

## The numbers

| Metric | Functional Groups in Chemistry | Atomas |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [3.6 (5 ratings)](https://appshunter.io/ios/app/functional-groups-in-chemistry/id859802575/reviews) | **[4.8 (3.4K ratings)](https://appshunter.io/ios/app/atomas/id953603155/reviews)** |
| Number of ratings | 5 | **3.4K** |
| Positive reviews | 51.9% of reviews | **93.9% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 23 months | **Monthly** |
| Monetization | Paid | **Free with in-app purchases** |
| Best chart rank | **#74** | — |
| Size | 23 MB | 33 MB |
| Requires iOS | **8.0** | 9.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Andrey Solovyev](https://appshunter.io/developer/655223913) | [Max Gittel](https://appshunter.io/developer/764787722) |

## What reviewers say

### Functional Groups in Chemistry

[App page](https://appshunter.io/ios/app/functional-groups-in-chemistry/id859802575)

**Currently charting:** #74 Top Paid · Trivia, #114 Top Paid · Word (US App Store)

Master organic chemistry by learning 80 functional groups and natural products. Engage with interactive quizzes, flashcards, and tables to prepare for exams. Supports learning in 13 languages.

**Highlights:** 80 functional groups and natural products, Spelling, multiple-choice, and time quizzes, Flashcards for memorization, Tables of functional groups, 13 language translations, Exam preparation tool

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | Free | one-time |
| Unlimited Hints | $2.99 | one-time |


### Atomas

[App page](https://appshunter.io/ios/app/atomas/id953603155)

Combine atoms to create new elements in this addictive puzzle game. Strategize to prevent your universe from overflowing and unlock special charms to aid your progress. Compete with friends for the highest score.

**Highlights:** Atom fusion mechanics, Element creation, Chain reactions, Lucky charms, Multiple game modes, Score comparison

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| No Ads & Instant Modes Unlock | $0.99 | one-time |
| 2 Antimatter | $1.99 | one-time |
| 5 Antimatter | $2.99 | one-time |
| 10 Antimatter | $4.99 | one-time |
| 12 Antimatter | $4.99 | one-time |

**What reviewers like**

- 🚀 Addictive gameplay
- 👍 Simple and intuitive
- 🔒 No ads or in-app purchases
- 🧠 Helps learn periodic table
- 🎨 Polished and visually appealing

**What reviewers complain about**

- 🐛 Occasional glitches and bugs
- 🤔 Difficulty can feel arbitrary at times
- 🎨 Similar atom colors can be confusing
- 🔍 Lack of clear tutorials or explanations

**Reported bugs**

- Undo button not working as expected
- Game crashing when sharing scores
- Inconsistent atom behavior with certain power-ups

**Requested features**

- More game modes and challenges
- Ability to save progress and sync across devices
- Option to adjust atom colors and sizes
- Achievements and leaderboards


## Frequently asked questions

### Is Functional Groups in Chemistry free?

Functional Groups in Chemistry costs $0.99, and also offers in-app purchases.

### Is Atomas free?

Atomas is free to download, with in-app purchases available.

### Which has better reviews, Functional Groups in Chemistry or Atomas?

Atomas is rated higher. Functional Groups in Chemistry averages 3.6 out of 5 from 5 ratings, while Atomas averages 4.8 from 3.4K ratings.

### Do Functional Groups in Chemistry or Atomas have ads?

Neither Functional Groups in Chemistry nor Atomas shows ads.

### Which is updated more often, Functional Groups in Chemistry or Atomas?

Functional Groups in Chemistry ships an update every 23 months, and Atomas monthly. Most recently, Functional Groups in Chemistry was updated on November 1, 2026 and Atomas on November 1, 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.*