# Learn by Sarmaaya vs Chembook

The clearest difference is in-app purchases: Learn by Sarmaaya at none against Chembook's 1. Learn by Sarmaaya also leads on iOS requirement (15.0 vs 17.0). Chembook's advantage is update cadence (every 3 weeks vs every 13 months). On price, ads and device support there is nothing between them.

Both are free to download. Chembook sells 1 one-off in-app purchase. Learn by Sarmaaya asks for nothing beyond the download.

Learn by Sarmaaya ships an update every 13 months, Chembook every 3 weeks. The most recent releases landed on October 28, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | Learn by Sarmaaya | Chembook |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 3 weeks** |
| Size | 111 MB | 110 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [abcData](https://appshunter.io/developer/1534703804) | [Hyuk-Yong Kwon](https://appshunter.io/developer/6796681340) |

## What reviewers say

### Learn by Sarmaaya

[App page](https://appshunter.io/ios/app/learn-by-sarmaaya/id6745784838)

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

**In-app purchases:** none


### Chembook

[App page](https://appshunter.io/ios/app/chembook-reaction-visualizer/id6796681338)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro | $6.99 | one-time |


## Frequently asked questions

### Is Learn by Sarmaaya free?

Learn by Sarmaaya is free to download, with no in-app purchases.

### Is Chembook free?

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

### Do Learn by Sarmaaya or Chembook have ads?

Neither Learn by Sarmaaya nor Chembook shows ads.

### Which is updated more often, Learn by Sarmaaya or Chembook?

Learn by Sarmaaya ships an update every 13 months, and Chembook every 3 weeks. Most recently, Learn by Sarmaaya was updated on October 28, 2026 and Chembook on October 15, 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.*