# USC 13 vs Infinite Library

The clearest difference is update cadence: Infinite Library at every 8 days against USC 13's every 16 months. USC 13's advantage is iOS requirement (12.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. USC 13 sells 3 one-off in-app purchases and Infinite Library sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

USC 13 ships an update every 16 months, Infinite Library every 8 days. The most recent releases landed on October 14, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | USC 13 | Infinite Library |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (41 ratings)](https://appshunter.io/ios/app/infinite-libraryai-book-maker/id6742030152/reviews)** |
| Number of ratings | — | **41** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 8 days** |
| Monetization | — | Free with in-app purchases |
| Size | 59 MB | 12 MB |
| Requires iOS | **12.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 12+ |
| Developer | [Lyker Labs LLC](https://appshunter.io/developer/891194494) | [Thomas A.Q.T. Truong](https://appshunter.io/developer/1565815544) |

## What reviewers say

### USC 13

[App page](https://appshunter.io/ios/app/usc-13-census/id1557889404)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| USC Title 13 | $4.99 | one-time |
| USC Title 13 | $12.99 | one-time |
| USC Title 13 | $44.99 | one-time |


### Infinite Library

[App page](https://appshunter.io/ios/app/infinite-libraryai-book-maker/id6742030152)

This AI-powered tool transforms your ideas into complete, publish-ready books in minutes. It offers an interview-style writing process, supports over 100 languages, and can even convert YouTube videos into manuscripts. You retain full rights and royalties.

**Highlights:** AI ghostwriter for book creation, Generate up to 100,000 words, Interview-style question and answer writing, Supports 100+ languages, Convert YouTube videos to books, Upload and adapt to your content, One-tap Amazon publishing

**Features:** Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Spark (5K Words) | $44.99 | one-time |
| Wordsmith (20K Words) | $142.99 | one-time |
| Author Pro (50K Words) | $284.99 | one-time |
| Bestseller (100K Words) | $464.99 | one-time |


## Frequently asked questions

### Is USC 13 free?

USC 13 is free to download, with in-app purchases available.

### Is Infinite Library free?

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

### Do USC 13 or Infinite Library have ads?

Neither USC 13 nor Infinite Library shows ads.

### Which is updated more often, USC 13 or Infinite Library?

USC 13 ships an update every 16 months, and Infinite Library every 8 days. Most recently, USC 13 was updated on October 14, 2026 and Infinite Library on October 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.*