# INNOOBD+ vs Book Context

The clearest difference is in-app purchases: INNOOBD+ at none against Book Context's 2. INNOOBD+ also leads on iOS requirement (13 vs 18.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Book Context sells 2 in-app purchases, starting at $0.99 per month. INNOOBD+ asks for nothing beyond the download.

INNOOBD+ ships an update every 2 weeks, Book Context every 3 weeks. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | INNOOBD+ | Book Context |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 146 MB | 5 MB |
| Requires iOS | **13** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Chaoyue Technology Development Co.,Ltd](https://appshunter.io/developer/1223781320) | [双仕 韩](https://appshunter.io/developer/1885479901) |

## What reviewers say

### INNOOBD+

[App page](https://appshunter.io/ios/app/innoobd-plus/id6683303203)

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

**In-app purchases:** none


### Book Context

[App page](https://appshunter.io/ios/app/book-context-smart-library/id6761686112)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly | $0.99 | per month |
| Pro Yearly | $7.99 | per year |


## Frequently asked questions

### Is INNOOBD+ free?

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

### Is Book Context free?

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

### Do INNOOBD+ or Book Context have ads?

Neither INNOOBD+ nor Book Context shows ads.

### Which is updated more often, INNOOBD+ or Book Context?

INNOOBD+ ships an update every 2 weeks, and Book Context every 3 weeks. Most recently, INNOOBD+ was updated on October 6, 2026 and Book Context on October 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.*