# NCERT KATBOOK vs STEMQuest

The clearest difference is update cadence: NCERT KATBOOK at every 8 days against STEMQuest's every 4 weeks. NCERT KATBOOK also leads on iOS requirement (15.1 vs 26.0). On price, ads, in-app purchases and device support there is nothing between them.

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

NCERT KATBOOK ships an update every 8 days, STEMQuest every 4 weeks. The most recent releases landed on March 25, 2026 and September 7, 2026 respectively.

## The numbers

| Metric | NCERT KATBOOK | STEMQuest |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 8 days** | Every 4 weeks |
| Size | 68 MB | 7 MB |
| Requires iOS | **15.1** | 26.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [sarath kakumanu](https://appshunter.io/developer/1317292488) | [HANG ZHENG](https://appshunter.io/developer/1871954264) |

## What reviewers say

### NCERT KATBOOK

[App page](https://appshunter.io/ios/app/ncert-katbook/id6753007971)

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

**In-app purchases:** none


### STEMQuest

[App page](https://appshunter.io/ios/app/stemquest/id6758280282)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is NCERT KATBOOK free?

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

### Is STEMQuest free?

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

### Do NCERT KATBOOK or STEMQuest have ads?

Neither NCERT KATBOOK nor STEMQuest shows ads.

### Which is updated more often, NCERT KATBOOK or STEMQuest?

NCERT KATBOOK ships an update every 8 days, and STEMQuest every 4 weeks. Most recently, NCERT KATBOOK was updated on March 25, 2026 and STEMQuest on September 7, 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.*