# U vs RainMark

The clearest difference is review sentiment: RainMark at 100% against U's 0%. RainMark also leads on rating (4.8 vs 2.0) and update cadence (every 10 days vs every 2 months). U's advantage is iOS requirement (7.0 vs 12). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

RainMark holds the better App Store score, 4.8 against 2.0. Both are backed by a comparable volume of ratings — 1 and 4 respectively. Written reviews point the same way: 0% of U's written reviews are positive against 100% of RainMark's.

U ships an update every 2 months, RainMark every 10 days. The most recent releases landed on October 21, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | U | RainMark |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/u-life/id635761726/reviews) | **[4.8 (4 ratings)](https://appshunter.io/ios/app/rainmark/id6751396538/reviews)** |
| Number of ratings | 1 | **4** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | Free | Free |
| Size | 12 MB | 69 MB |
| Requires iOS | **7.0** | 12 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [GOSCAM (Shenzhen Gospell Smarthome Electronic Co., Ltd.)](https://appshunter.io/developer/480877456) | [峻宏 刘](https://appshunter.io/developer/1834818077) |

## What reviewers say

### U

[App page](https://appshunter.io/ios/app/u-life/id635761726)

This internet-based video service platform allows users to register and monitor multiple IP and 3G cameras. With the dedicated software, you can freely control and view your connected video devices from anywhere.

**Highlights:** Register IP and 3G cameras, Monitor multiple video devices, Control video devices remotely, Internet-based video service, Load U-life software for access

**Features:** macOS Compatibility

**In-app purchases:** none


### RainMark

[App page](https://appshunter.io/ios/app/rainmark/id6751396538)

Enhance your photos with professional watermark borders that automatically display shooting parameters. Choose from a variety of design templates and customize your signature and layout for a unique look. Export your creations in original quality with fast batch processing.

**Highlights:** Smart EXIF parameter reading, Professional design templates, Deep watermark customization, Signature support (text/image), Ultra-fast batch processing, Original quality export, Real-time preview

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is U free?

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

### Is RainMark free?

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

### Which has better reviews, U or RainMark?

RainMark is rated higher. U averages 2.0 out of 5 from 1 ratings, while RainMark averages 4.8 from 4 ratings.

### Do U or RainMark have ads?

Neither U nor RainMark shows ads.

### Which is updated more often, U or RainMark?

U ships an update every 2 months, and RainMark every 10 days. Most recently, U was updated on October 21, 2026 and RainMark on October 24, 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.*