# 不揪？ vs EchoWithin

The clearest difference is in-app purchases: 不揪？ at none against EchoWithin's 3. 不揪？ also leads on iOS requirement (16.6 vs 18.0). EchoWithin's advantage is update cadence (daily vs every 10 days). On price, ads and device support there is nothing between them.

Both are free to download. EchoWithin sells 3 in-app purchases, starting at $4.99 per month. 不揪？ asks for nothing beyond the download.

不揪？ ships an update every 10 days, EchoWithin daily. The most recent releases landed on September 15, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | 不揪？ | EchoWithin |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Daily** |
| Size | 18 MB | 11 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [HSIN-CHE CHUNG](https://appshunter.io/developer/1790383607) | [Dao-Heng Dong](https://appshunter.io/developer/1871132405) |

## What reviewers say

### 不揪？

[App page](https://appshunter.io/ios/app/id6740519975)

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

**In-app purchases:** none


### EchoWithin

[App page](https://appshunter.io/ios/app/echowithin/id6758141270)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| EchoWithin Pro | $4.99 | per month |
| EchoWithin Pro | $29.99 | per year |
| EchoWithin Pro | $59.99 | one-time |


## Frequently asked questions

### Is 不揪？ free?

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

### Is EchoWithin free?

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

### Do 不揪？ or EchoWithin have ads?

Neither 不揪？ nor EchoWithin shows ads.

### Which is updated more often, 不揪？ or EchoWithin?

不揪？ ships an update every 10 days, and EchoWithin daily. Most recently, 不揪？ was updated on September 15, 2026 and EchoWithin on September 19, 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.*