# 水印大师 vs RootKey

水印大师 and RootKey both sit at 5.0 stars, but that hides the real split: 100% of RootKey's written reviews are positive against 44% of 水印大师's. RootKey also leads on update cadence (daily vs fortnightly). 水印大师's advantage is ratings volume (13 vs 1) and monetization model (free with in-app purchases vs paid). On price, rating, ads and in-app purchases there is nothing between them.

Both are free to download. 水印大师 sells 10 in-app purchases, starting at $3.99 per 7 days and RootKey sells 6 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 5.0 for 水印大师 against 5.0 for RootKey. That said, the two scores are not equally well evidenced: 水印大师 has 13 ratings behind it against 1, so its average is the more settled of the two. Written reviews are what separate them: 44% of 水印大师's written reviews are positive against 100% of RootKey's.

水印大师 ships an update fortnightly, RootKey daily. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 水印大师 | RootKey |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (13 ratings)](https://appshunter.io/ios/app/id6670387586/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/rootkey-ai-coding-and-passwords/id6806959122/reviews) |
| Number of ratings | **13** | 1 |
| Positive reviews | 43.8% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Fortnightly | **Daily** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 53 MB | 90 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Tanbei Information](https://appshunter.io/developer/1766044728) | [Jiangsu Xinghui Shuzhi Technology Co., Ltd](https://appshunter.io/developer/1854062439) |

## What reviewers say

### 水印大师

[App page](https://appshunter.io/ios/app/id6670387586)

Easily extract videos and images from various links. Add custom watermarks, stickers, and text to your photos. Access a vast library of high-definition video materials for your creative projects.

**Highlights:** Extract videos from links, Batch save images from links, Add custom watermarks to images, Extensive video material library, AI image repair, Format conversion

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

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 周会员-3天免费试用 | $3.99 | per 7 days |
| 包周使用 | $3.99 | per 7 days |
| 水印大师VIP-包周会员 | $7.99 | per 7 days |
| 水印大师VIP-包月会员 | $14.99 | per month |
| 包年会员 | $39.99 | per year |
| 80积分 | $3.99 | one-time |
| 280积分 | $9.99 | one-time |
| 580积分 | $19.99 | one-time |
| 终生会员 | $39.99 | one-time |
| 1400积分 | $39.99 | one-time |


### RootKey

[App page](https://appshunter.io/ios/app/rootkey-ai-coding-and-passwords/id6806959122)

Securely manage your passwords and sensitive data with end-to-end encryption. This app offers offline access, cross-device syncing via your chosen cloud service, and a one-time purchase model with free updates. It also integrates AI coding assistants with granular access controls.

**Highlights:** End-to-end encryption, Offline access, Cross-device syncing, One-time purchase, AI coding assistant integration, Password generator, Security checks

**Features:** iPhone Duo support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Upgrade 1 to 3 Devices | $4.99 | one-time |
| 1 Device · Lifetime | $9.99 | one-time |
| 3 Devices · Lifetime | $14.99 | one-time |
| Upgrade 3 to 5 Devices | $14.99 | one-time |
| Upgrade 1 to 5 Devices | $19.99 | one-time |
| 5 Devices · Lifetime | $29.99 | one-time |


## Frequently asked questions

### Is 水印大师 free?

水印大师 is free to download, with in-app purchases available.

### Is RootKey free?

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

### Which has better reviews, 水印大师 or RootKey?

水印大师 and RootKey are both rated 5.0 out of 5 on the App Store, from 13 and 1 ratings respectively.

### Do 水印大师 or RootKey have ads?

Neither 水印大师 nor RootKey shows ads.

### Which is updated more often, 水印大师 or RootKey?

水印大师 ships an update fortnightly, and RootKey daily. Most recently, 水印大师 was updated on October 30, 2026 and RootKey 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.*