# SOSmaths vs Periodic Table & Chemistry

The clearest difference is in-app purchases: SOSmaths at none against Periodic Table & Chemistry's 3. SOSmaths also leads on iOS requirement (11.0 vs 17.0). Periodic Table & Chemistry's advantage is update cadence (monthly vs every 11 months). On price, ads and device support there is nothing between them.

Both are free to download. Periodic Table & Chemistry sells 3 in-app purchases, starting at $2.99 per 7 days. SOSmaths asks for nothing beyond the download.

SOSmaths ships an update every 11 months, Periodic Table & Chemistry monthly. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | SOSmaths | Periodic Table & Chemistry |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/periodic-table-and-chemistry/id6771011814/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 11 months | **Monthly** |
| Monetization | — | Free with in-app purchases |
| Size | 78 MB | 34 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [DEUSE](https://appshunter.io/developer/1291290064) | [Phuc Pham](https://appshunter.io/developer/1893081423) |

## What reviewers say

### SOSmaths

[App page](https://appshunter.io/ios/app/sosmaths/id1483450176)

**Features:** macOS Compatibility

**In-app purchases:** none


### Periodic Table & Chemistry

[App page](https://appshunter.io/ios/app/periodic-table-and-chemistry/id6771011814)

Explore all 118 elements with detailed information, including atomic mass, electron configuration, and uses. Learn about named reactions, bonding, and periodic trends. Test your knowledge with an interactive quiz, all available offline.

**Highlights:** 118 element library with detailed pages, Named reactions and bonding lab, Periodic trend visualizations, Offline functionality, Element quiz, Instant search and filtering

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Atomic Data Weekly | $2.99 | per 7 days |
| Exam Prep Yearly | $14.99 | per year |
| Reaction Explorer, Pay Once | $29.99 | one-time |


## Frequently asked questions

### Is SOSmaths free?

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

### Is Periodic Table & Chemistry free?

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

### Do SOSmaths or Periodic Table & Chemistry have ads?

Neither SOSmaths nor Periodic Table & Chemistry shows ads.

### Which is updated more often, SOSmaths or Periodic Table & Chemistry?

SOSmaths ships an update every 11 months, and Periodic Table & Chemistry monthly. Most recently, SOSmaths was updated on November 3, 2026 and Periodic Table & Chemistry on October 31, 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.*