# 知买 vs EarRest

The clearest difference is in-app purchases: 知买 at none against EarRest's 3. 知买 also leads on device support (3 vs 1) and iOS requirement (12 vs 17.0). EarRest's advantage is update cadence (every 2 days vs fortnightly). On price and ads there is nothing between them.

Both are free to download. EarRest sells 3 in-app purchases, starting at $0.99 per month. 知买 asks for nothing beyond the download.

知买 ships an update fortnightly, EarRest every 2 days. The most recent releases landed on October 7, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | 知买 | EarRest |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/earrest-hearing-break-timer/id6789735127/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Every 2 days** |
| Monetization | — | Freemium |
| Size | 37 MB | 10 MB |
| Requires iOS | **12** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [杭州知买电子商务有限公司](https://appshunter.io/developer/1852960289) | [月梅 孙](https://appshunter.io/developer/1893807267) |

## What reviewers say

### 知买

[App page](https://appshunter.io/ios/app/id6755290773)

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

**In-app purchases:** none


### EarRest

[App page](https://appshunter.io/ios/app/earrest-hearing-break-timer/id6789735127)

This app monitors your Bluetooth headphone usage and automatically reminds you to take breaks to protect your hearing. It tracks listening time, offers customizable break intervals, and provides historical data to help you build healthier habits.

**Highlights:** Automatic Bluetooth headphone tracking, Customizable break reminders, Live Activity and Dynamic Island integration, Home and Lock Screen widgets, Quiet Hours (Do Not Disturb), Listening history, macOS companion app

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EarRest Pro Monthly | $0.99 | per month |
| EarRest Pro Yearly | $4.99 | per year |
| EarRest Pro Lifetime | $9.99 | one-time |


## Frequently asked questions

### Is 知买 free?

知买 is free to download, with no in-app purchases.

### Is EarRest free?

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

### Do 知买 or EarRest have ads?

Neither 知买 nor EarRest shows ads.

### Which is updated more often, 知买 or EarRest?

知买 ships an update fortnightly, and EarRest every 2 days. Most recently, 知买 was updated on October 7, 2026 and EarRest on October 11, 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.*