# Periodic Table Elements Quiz・ vs RCDE Challenge

The clearest difference is in-app purchases: RCDE Challenge at none against Periodic Table Elements Quiz・'s 1. RCDE Challenge also leads on update cadence (every 3 weeks vs every 3 months) and iOS requirement (12.0 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. Periodic Table Elements Quiz・ sells 1 one-off in-app purchase. RCDE Challenge asks for nothing beyond the download.

Periodic Table Elements Quiz・ ships an update every 3 months, RCDE Challenge every 3 weeks. The most recent releases landed on October 5, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Periodic Table Elements Quiz・ | RCDE Challenge |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (25 ratings)](https://appshunter.io/ios/app/periodic-table-elements-quiz/id6737477955/reviews)** | — |
| Number of ratings | **25** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 64 MB | 175 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Olena Romashova](https://appshunter.io/developer/1763191312) | [Dani Morillas](https://appshunter.io/developer/993108331) |

## What reviewers say

### Periodic Table Elements Quiz・

[App page](https://appshunter.io/ios/app/periodic-table-elements-quiz/id6737477955)

Test your chemistry knowledge with an interactive periodic table quiz. Features multiple game modes, progressive difficulty, and progress tracking to help you master chemical elements.

**Highlights:** Multiple quiz modes (Symbol to Name, Name to Symbol, Atomic Number, Atomic Weight), Progressive difficulty levels, Track learning progress and scores, User-friendly interface, Interactive learning tool

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $2.99 | one-time |


### RCDE Challenge

[App page](https://appshunter.io/ios/app/rcde-challenge/id6745030193)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Periodic Table Elements Quiz・ free?

Periodic Table Elements Quiz・ is free to download, with in-app purchases available.

### Is RCDE Challenge free?

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

### Do Periodic Table Elements Quiz・ or RCDE Challenge have ads?

Both Periodic Table Elements Quiz・ and RCDE Challenge show ads.

### Which is updated more often, Periodic Table Elements Quiz・ or RCDE Challenge?

Periodic Table Elements Quiz・ ships an update every 3 months, and RCDE Challenge every 3 weeks. Most recently, Periodic Table Elements Quiz・ was updated on October 5, 2026 and RCDE Challenge on October 12, 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.*