# 壹印 vs 同调计划 | Sync Project

The clearest difference is in-app purchases: 同调计划 | Sync Project at none against 壹印's 7. 同调计划 | Sync Project also leads on iOS requirement (13.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 壹印 sells 7 one-off in-app purchases. 同调计划 | Sync Project asks for nothing beyond the download.

壹印 ships an update every 2 weeks, 同调计划 | Sync Project weekly. The most recent releases landed on September 9, 2026 and September 5, 2026 respectively.

## The numbers

| Metric | 壹印 | 同调计划 | Sync Project |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Weekly** |
| Size | 68 MB | 124 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [悦波 卢](https://appshunter.io/developer/1755396829) | [上海凌可通电子科技有限公司](https://appshunter.io/developer/1797015309) |

## What reviewers say

### 壹印

[App page](https://appshunter.io/ios/app/id6541753952)

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 月度会员 | $0.99 | one-time |
| 月度会员 | $1.99 | one-time |
| 季度会员 | $1.99 | one-time |
| 季度会员 | $3.99 | one-time |
| 年度会员 | $8.99 | one-time |
| 年度会员 | $14.99 | one-time |
| 永久会员 | $19.99 | one-time |


### 同调计划 | Sync Project

[App page](https://appshunter.io/ios/app/sync-project/id6756963398)

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

**In-app purchases:** none


## Frequently asked questions

### Is 壹印 free?

壹印 is free to download, with in-app purchases available.

### Is 同调计划 | Sync Project free?

同调计划 | Sync Project is free to download, with no in-app purchases.

### Do 壹印 or 同调计划 | Sync Project have ads?

Neither 壹印 nor 同调计划 | Sync Project shows ads.

### Which is updated more often, 壹印 or 同调计划 | Sync Project?

壹印 ships an update every 2 weeks, and 同调计划 | Sync Project weekly. Most recently, 壹印 was updated on September 9, 2026 and 同调计划 | Sync Project on September 5, 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.*