# USC 13 vs WillPower Books

The clearest difference is update cadence: WillPower Books at every 9 days against USC 13's every 16 months. USC 13's advantage is iOS requirement (12.0 vs 14.0.0). 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 WillPower Books sells 5 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

USC 13 ships an update every 16 months, WillPower Books every 9 days. The most recent releases landed on October 14, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | USC 13 | WillPower Books |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (27 ratings)](https://appshunter.io/ios/app/willpower-books/id6740638075/reviews)** |
| Number of ratings | — | **27** |
| Positive reviews | — | 81.8% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 9 days** |
| Monetization | — | Free with in-app purchases |
| Size | 59 MB | 64 MB |
| Requires iOS | **12.0** | 14.0.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Lyker Labs LLC](https://appshunter.io/developer/891194494) | [Kishori Timsina](https://appshunter.io/developer/1728609560) |

## 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 |


### WillPower Books

[App page](https://appshunter.io/ios/app/willpower-books/id6740638075)

Access concise summaries of popular books, available to read or listen to in under 30 minutes. Enjoy a comfortable reading experience with light and dark modes, and save your favorites for quick access. New summaries are added weekly.

**Highlights:** Book summaries in 20-30 minutes, Read and listen options, English and Myanmar languages, Light and dark reading modes, Offline access, Bookmark favorite books, Weekly new summaries

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Access All Books | $2.99 | per month |
| Premium | $8.99 | per 3 months |
| Premium | $12.99 | per 6 months |
| Premium | $24.99 | per year |
| Lifetime Premium | $119.00 | one-time |


## Frequently asked questions

### Is USC 13 free?

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

### Is WillPower Books free?

WillPower Books is free to download, with in-app purchases available.

### Do USC 13 or WillPower Books have ads?

Neither USC 13 nor WillPower Books shows ads.

### Which is updated more often, USC 13 or WillPower Books?

USC 13 ships an update every 16 months, and WillPower Books every 9 days. Most recently, USC 13 was updated on October 14, 2026 and WillPower Books on October 9, 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.*