# 随身水印相机 vs InstaSOS

The clearest difference is in-app purchases: InstaSOS at none against 随身水印相机's 10. InstaSOS also leads on ads (none vs shown) and update cadence (every 3 weeks vs every 4 months). 随身水印相机's advantage is iOS requirement (13.0 vs 15.6). On price and device support there is nothing between them.

Both are free to download. 随身水印相机 sells 8 in-app purchases, starting at $2.99 per 7 days. InstaSOS asks for nothing beyond the download.

随身水印相机 ships an update every 4 months, InstaSOS every 3 weeks. The most recent releases landed on October 16, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | 随身水印相机 | InstaSOS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 3 weeks** |
| Size | 34 MB | 51 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Fingertip Jusheng (Taiyuan) Network Technology Co. LTD](https://appshunter.io/developer/1687910061) | [Empathetech](https://appshunter.io/developer/1743866691) |

## What reviewers say

### 随身水印相机

[App page](https://appshunter.io/ios/app/id6450022972)

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

**In-app purchases (8)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周度会员 | $2.99 | per 7 days |
| 月VIP | $2.99 | per month |
| 月度会员 | $3.99 | per month |
| 月VIP | $3.99 | per 3 months |
| 月VIP | $4.99 | per year |
| 季度会员 | $6.99 | per 3 months |
| 季度会员 | $7.99 | per 3 months |
| 年度会员 | $9.99 | per year |


### InstaSOS

[App page](https://appshunter.io/ios/app/instasos/id6744280817)

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

**In-app purchases:** none


## Frequently asked questions

### Is 随身水印相机 free?

随身水印相机 is free to download, with in-app purchases available.

### Is InstaSOS free?

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

### Do 随身水印相机 or InstaSOS have ads?

随身水印相机 shows ads; InstaSOS does not.

### Which is updated more often, 随身水印相机 or InstaSOS?

随身水印相机 ships an update every 4 months, and InstaSOS every 3 weeks. Most recently, 随身水印相机 was updated on October 16, 2026 and InstaSOS on October 20, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*