# Strut vs chapter lock

The clearest difference is update cadence: chapter lock at every 2 days against Strut's every 5 days. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Strut sells 2 in-app purchases, starting at $9.99 per month and chapter lock sells 2 in-app purchases, starting at $6.99 per 7 days. Whichever you choose, the download price is not the number that matters.

Strut ships an update every 5 days, chapter lock every 2 days. The most recent releases landed on September 26, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Strut | chapter lock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[3.5 (2 ratings)](https://appshunter.io/ios/app/chapter-lock-screen-time/id6770329811/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 5 days | **Every 2 days** |
| Monetization | — | Subscription |
| Size | 10 MB | 25 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Cybernetica.io](https://appshunter.io/developer/1812914551) | [Caccamedia LLC](https://appshunter.io/developer/1896667819) |

## What reviewers say

### Strut

[App page](https://appshunter.io/ios/app/strut-steps-unlock/id6758520750)

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Subscription | $9.99 | per month |
| Pro Subscription | $29.99 | per year |


### chapter lock

[App page](https://appshunter.io/ios/app/chapter-lock-screen-time/id6770329811)

This app helps you read more by blocking distracting applications until you meet your reading goals. Set custom reading targets, track your progress, and build a consistent daily habit of turning screen time into reading time.

**Highlights:** App blocking for social media and games, Flexible reading goals (pages or time), Reading habit building, Streak tracking for consistency, Reading insights and progress tracking, In-app library for tracking books

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| pro (weekly) | $6.99 | per 7 days |
| pro (yearly) | $49.99 | per year |


## Frequently asked questions

### Is Strut free?

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

### Is chapter lock free?

chapter lock is free to download, with in-app purchases available.

### Do Strut or chapter lock have ads?

Neither Strut nor chapter lock shows ads.

### Which is updated more often, Strut or chapter lock?

Strut ships an update every 5 days, and chapter lock every 2 days. Most recently, Strut was updated on September 26, 2026 and chapter lock 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.*