# chapter lock vs Tether

The clearest difference is review sentiment: Tether at 100% against chapter lock's 0%. Tether also leads on rating (5.0 vs 3.5) and monetization model (free with in-app purchases vs subscription). chapter lock's advantage is update cadence (every 2 days vs weekly). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. chapter lock sells 2 in-app purchases, starting at $6.99 per 7 days and Tether sells 6 in-app purchases, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

Tether holds the better App Store score, 5.0 against 3.5. Both are backed by a comparable volume of ratings — 2 and 2 respectively. Written reviews point the same way: 0% of chapter lock's written reviews are positive against 100% of Tether's.

chapter lock ships an update every 2 days, Tether weekly. The most recent releases landed on October 31, 2026 and November 1, 2026 respectively.

## The numbers

| Metric | chapter lock | Tether |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.5 (2 ratings)](https://appshunter.io/ios/app/chapter-lock-screen-time/id6770329811/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/tether-adhd-planner-and-focus/id6777777931/reviews)** |
| Number of ratings | 2 | 2 |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 2 days** | Weekly |
| Monetization | Subscription | **Free with in-app purchases** |
| Size | 25 MB | 43 MB |
| Requires iOS | **17.0** | 18 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Caccamedia LLC](https://appshunter.io/developer/1896667819) | [Sanket Ray](https://appshunter.io/developer/1329199499) |

## What reviewers say

### 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 |


### Tether

[App page](https://appshunter.io/ios/app/tether-adhd-planner-and-focus/id6777777931)

This visual planner helps individuals with ADHD manage their day using time blocks instead of endless lists. It breaks down tasks, tracks energy levels, and offers a focus timer to improve concentration. Premium features include voice capture, schedule suggestions, and calendar synchronization.

**Highlights:** Visual time blocks for daily planning, Task breakdown into smaller steps, Energy level tracking for tasks, Full-screen focus timer with background sound, Apple Calendar synchronization, Voice task capture

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

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tether Plus | $2.99 | per month |
| Tether Premium | $7.99 | per month |
| Tether Plus | $29.99 | per year |
| Tether Premium | $44.99 | per year |
| Tether Plus | $49.99 | one-time |
| Tether Premium | $124.99 | one-time |


## Frequently asked questions

### Is chapter lock free?

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

### Is Tether free?

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

### Which has better reviews, chapter lock or Tether?

Tether is rated higher. chapter lock averages 3.5 out of 5 from 2 ratings, while Tether averages 5.0 from 2 ratings.

### Do chapter lock or Tether have ads?

Neither chapter lock nor Tether shows ads.

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

chapter lock ships an update every 2 days, and Tether weekly. Most recently, chapter lock was updated on October 31, 2026 and Tether on November 1, 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.*