# Locking Check vs echor｜Idea Notes, Book Quotes

The clearest difference is in-app purchases: echor｜Idea Notes, Book Quotes at none against Locking Check's 1. echor｜Idea Notes, Book Quotes also leads on ads (none vs shown) and update cadence (weekly vs every 6 weeks). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Locking Check sells 1 one-off in-app purchase. echor｜Idea Notes, Book Quotes asks for nothing beyond the download.

Locking Check ships an update every 6 weeks, echor｜Idea Notes, Book Quotes weekly. The most recent releases landed on September 16, 2026 and September 25, 2026 respectively.

## The numbers

| Metric | Locking Check | echor｜Idea Notes, Book Quotes |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 weeks | **Weekly** |
| Size | 5 MB | 24 MB |
| Requires iOS | **14.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Atsushi Ezaki](https://appshunter.io/developer/1099847684) | [dannpen](https://appshunter.io/developer/1896768853) |

## What reviewers say

### Locking Check

[App page](https://appshunter.io/ios/app/locking-check/id1523162174)

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Hide Ads | $1.99 | one-time |


### echor｜Idea Notes, Book Quotes

[App page](https://appshunter.io/ios/app/echoridea-notes-book-quotes/id6771013945)

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

**In-app purchases:** none


## Frequently asked questions

### Is Locking Check free?

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

### Is echor｜Idea Notes, Book Quotes free?

echor｜Idea Notes, Book Quotes is free to download, with no in-app purchases.

### Do Locking Check or echor｜Idea Notes, Book Quotes have ads?

Locking Check shows ads; echor｜Idea Notes, Book Quotes does not.

### Which is updated more often, Locking Check or echor｜Idea Notes, Book Quotes?

Locking Check ships an update every 6 weeks, and echor｜Idea Notes, Book Quotes weekly. Most recently, Locking Check was updated on September 16, 2026 and echor｜Idea Notes, Book Quotes on September 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.*