# 解压树洞 vs SYNC

The clearest difference is update cadence: 解压树洞 at every 9 days against SYNC's every 2 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 解压树洞 sells 5 in-app purchases, starting at $2.99 per month and SYNC sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.

解压树洞 ships an update every 9 days, SYNC every 2 months. Both last shipped on October 31, 2026.

## The numbers

| Metric | 解压树洞 | SYNC |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 9 days** | Every 2 months |
| Size | 120 MB | 65 MB |
| Requires iOS | 15.1 | **15.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 9+ |
| Developer | [青青 吴](https://appshunter.io/developer/1594811700) | [Mustafa Salim Erek](https://appshunter.io/developer/1896175573) |

## What reviewers say

### 解压树洞

[App page](https://appshunter.io/ios/app/id6775739175)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly | $2.99 | per month |
| Monthly | $2.99 | per month |
| Weekly | $2.99 | per 7 days |
| Yearly | $12.99 | per year |
| Permanent VIP | $29.99 | one-time |


### SYNC

[App page](https://appshunter.io/ios/app/sync-the-daily-question/id6799400522)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| SYNC Premium Monthly | $4.99 | per month |
| SYNC Premium Yearly | $29.99 | per year |


## Frequently asked questions

### Is 解压树洞 free?

解压树洞 is free to download, with in-app purchases available.

### Is SYNC free?

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

### Do 解压树洞 or SYNC have ads?

Neither 解压树洞 nor SYNC shows ads.

### Which is updated more often, 解压树洞 or SYNC?

解压树洞 ships an update every 9 days, and SYNC every 2 months. Most recently, 解压树洞 was updated on October 31, 2026 and SYNC on October 31, 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.*