# Conversions vs Chemical Formulas Quiz

The clearest difference is update cadence: Conversions at weekly against Chemical Formulas Quiz's every 3 months. Conversions also leads on iOS requirement (8.0 vs 11). On price, review sentiment, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Conversions ships an update weekly, Chemical Formulas Quiz every 3 months. The most recent releases landed on October 2, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | Conversions | Chemical Formulas Quiz |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.4 (7 ratings)](https://appshunter.io/ios/app/chemical-formulas-quiz/id1338676361/reviews)** |
| Number of ratings | — | **7** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 months |
| Monetization | Free | Free |
| Size | 23 MB | 9 MB |
| Requires iOS | **8.0** | 11 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Petr Zvonicek](https://appshunter.io/developer/501623515) | [Marijn Dillen](https://appshunter.io/developer/1276712320) |

## What reviewers say

### Conversions

[App page](https://appshunter.io/ios/app/conversions-unit-conversion-practice/id1097032344)

Practice unit conversions with this adaptive educational app. It offers a variety of exercises covering length, mass, area, temperature, and currency conversions using metric and imperial systems.

**Highlights:** Adaptive learning exercises, Length, mass, and area conversions, Temperature conversion practice, Currency conversion exercises, Metric and imperial unit support

**Features:** macOS Compatibility

**In-app purchases:** none


### Chemical Formulas Quiz

[App page](https://appshunter.io/ios/app/chemical-formulas-quiz/id1338676361)

Master chemical formulas through engaging multiple-choice quizzes. Learn inorganic and organic substances and ions commonly taught in high school. The app provides common and systematic names to aid your learning.

**Highlights:** Learn inorganic and organic formulas, Multiple choice quizzes, Common and systematic names, High school curriculum focus, Free to play

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

**In-app purchases:** none


## Frequently asked questions

### Is Conversions free?

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

### Is Chemical Formulas Quiz free?

Chemical Formulas Quiz is free to download, with no in-app purchases.

### Do Conversions or Chemical Formulas Quiz have ads?

Neither Conversions nor Chemical Formulas Quiz shows ads.

### Which is updated more often, Conversions or Chemical Formulas Quiz?

Conversions ships an update weekly, and Chemical Formulas Quiz every 3 months. Most recently, Conversions was updated on October 2, 2026 and Chemical Formulas Quiz on October 14, 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.*