# Quality Inspector Exam Prep vs NCERT KATBOOK

The clearest difference is in-app purchases: NCERT KATBOOK at none against Quality Inspector Exam Prep's 9. NCERT KATBOOK also leads on update cadence (every 8 days vs every 4 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Quality Inspector Exam Prep sells 9 in-app purchases, starting at $8.99 per 7 days. NCERT KATBOOK asks for nothing beyond the download.

Quality Inspector Exam Prep ships an update every 4 months, NCERT KATBOOK every 8 days. The most recent releases landed on June 4, 2026 and March 25, 2026 respectively.

## The numbers

| Metric | Quality Inspector Exam Prep | NCERT KATBOOK |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 8 days** |
| Size | 50 MB | 68 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Exam Prep OU](https://appshunter.io/developer/1689642184) | [sarath kakumanu](https://appshunter.io/developer/1317292488) |

## What reviewers say

### Quality Inspector Exam Prep

[App page](https://appshunter.io/ios/app/quality-inspector-exam-prep/id6742052227)

**Features:** macOS Compatibility

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| CQI Weekly Full Access | $8.99 | per 7 days |
| CQI Monthly Full Access | $24.99 | per month |
| CQI Monthly Full Access | $34.99 | per month |
| CQI Quarterly Full Access | $55.99 | per 3 months |
| CQI Quarterly Full Access | $59.99 | per 3 months |
| CQI Semiannual Full Access | $75.99 | per 6 months |
| CQI Semiannual Full Access | $79.99 | per 6 months |
| CQI Annual Full Access | $109.99 | per year |
| CQI Annual Full Access | $119.99 | per year |


### NCERT KATBOOK

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

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

**In-app purchases:** none


## Frequently asked questions

### Is Quality Inspector Exam Prep free?

Quality Inspector Exam Prep is free to download, with in-app purchases available.

### Is NCERT KATBOOK free?

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

### Do Quality Inspector Exam Prep or NCERT KATBOOK have ads?

Neither Quality Inspector Exam Prep nor NCERT KATBOOK shows ads.

### Which is updated more often, Quality Inspector Exam Prep or NCERT KATBOOK?

Quality Inspector Exam Prep ships an update every 4 months, and NCERT KATBOOK every 8 days. Most recently, Quality Inspector Exam Prep was updated on June 4, 2026 and NCERT KATBOOK on March 25, 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.*