# ARC Library vs Kidden

The clearest difference is update cadence: Kidden at every 8 days against ARC Library's every 3 weeks. 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.

ARC Library ships an update every 3 weeks, Kidden every 8 days. The most recent releases landed on September 17, 2026 and May 17, 2026 respectively.

## The numbers

| Metric | ARC Library | Kidden |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/arc-library/id6737032389/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 8 days** |
| Monetization | Free | — |
| Size | 28 MB | 97 MB |
| Requires iOS | 15 | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [MBRGI](https://appshunter.io/developer/1335516125) | [KIDDEN COMPANY FOR OPERATING SPORTS FIELDS](https://appshunter.io/developer/1783521540) |

## What reviewers say

### ARC Library

[App page](https://appshunter.io/ios/app/arc-library/id6737032389)

Access a wide range of books and track your reading progress for a literacy initiative. Summarize both digital and physical books with intuitive tools. Earn achievements as you work towards your reading goals.

**Highlights:** Extensive book collection, Interactive summaries, Progress tracking, Achievement earning, Summarize physical books

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

**In-app purchases:** none


### Kidden

[App page](https://appshunter.io/ios/app/kidden/id6739052016)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ARC Library free?

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

### Is Kidden free?

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

### Do ARC Library or Kidden have ads?

Neither ARC Library nor Kidden shows ads.

### Which is updated more often, ARC Library or Kidden?

ARC Library ships an update every 3 weeks, and Kidden every 8 days. Most recently, ARC Library was updated on September 17, 2026 and Kidden on May 17, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*