# Chemicastle vs Periodic Table

The clearest difference is in-app purchases: Chemicastle at none against Periodic Table's 2. Chemicastle also leads on iOS requirement (15.0 vs 17.0). Periodic Table's advantage is update cadence (every 11 days vs every 4 months). On price, ads and device support there is nothing between them.

Both are free to download. Periodic Table sells 2 one-off in-app purchases. Chemicastle asks for nothing beyond the download.

Chemicastle ships an update every 4 months, Periodic Table every 11 days. The most recent releases landed on October 10, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Chemicastle | Periodic Table |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/periodic-table-elements-lab/id6780071541/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 11 days** |
| Monetization | — | Free |
| Size | 301 MB | 143 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 9+ | 4+ |
| Developer | [Haute ecole pedagogique HEP-BEJUNE](https://appshunter.io/developer/1835648343) | [Rizk Corsight, LLC](https://appshunter.io/developer/1896065289) |

## What reviewers say

### Chemicastle

[App page](https://appshunter.io/ios/app/chemicastle/id6753705536)

**Features:** macOS Compatibility

**In-app purchases:** none


### Periodic Table

[App page](https://appshunter.io/ios/app/periodic-table-elements-lab/id6780071541)

Explore all 118 elements with detailed data, original illustrations, and a spaced-repetition study system. Features include a guided equation balancer, 3D atom view, and molar-mass calculator. This private app works offline and is designed for effective learning.

**Highlights:** All 118 elements with original illustrations, Spaced-repetition study system, Guided equation balancer, 3D atom view, Molar-mass calculator, Offline functionality, Curriculum packs for AP, IB, A-Level, GCSE, MCAT

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 3-Day Trial | Free | one-time |
| Full Access Unlock | $4.99 | one-time |


## Frequently asked questions

### Is Chemicastle free?

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

### Is Periodic Table free?

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

### Do Chemicastle or Periodic Table have ads?

Neither Chemicastle nor Periodic Table shows ads.

### Which is updated more often, Chemicastle or Periodic Table?

Chemicastle ships an update every 4 months, and Periodic Table every 11 days. Most recently, Chemicastle was updated on October 10, 2026 and Periodic Table on October 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.*