# RB Link vs U

The clearest difference is update cadence: U at every 3 weeks against RB Link's every 2 months. RB Link's advantage is ratings volume (3 vs 1). On price, rating, ads and in-app purchases there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for RB Link against 5.0 for U. Both are backed by a comparable volume of ratings — 3 and 1 respectively.

RB Link ships an update every 2 months, U every 3 weeks. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | RB Link | U |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (3 ratings)](https://appshunter.io/ios/app/rb-link/id6471579253/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/u-prox-united/id6739584210/reviews) |
| Number of ratings | **3** | 1 |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 125 MB | 113 MB |
| Requires iOS | **15.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Dusun Electron Co., Ltd](https://appshunter.io/developer/1272174520) | [a2softin](https://appshunter.io/developer/1133492162) |

## What reviewers say

### RB Link

[App page](https://appshunter.io/ios/app/rb-link/id6471579253)

Control your smart home security system remotely. Arm, disarm, and receive instant notifications for peace of mind. Manage home automation and share access with family members.

**Highlights:** Arm and disarm security system, Instant alarm notifications, Manage home automation, Share system access with family, Intuitive interface design

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

**In-app purchases:** none


### U

[App page](https://appshunter.io/ios/app/u-prox-united/id6739584210)

**In-app purchases:** none


## Frequently asked questions

### Is RB Link free?

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

### Is U free?

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

### Which has better reviews, RB Link or U?

RB Link and U are both rated 5.0 out of 5 on the App Store, from 3 and 1 ratings respectively.

### Do RB Link or U have ads?

Neither RB Link nor U shows ads.

### Which is updated more often, RB Link or U?

RB Link ships an update every 2 months, and U every 3 weeks. Most recently, RB Link was updated on October 24, 2026 and U on October 30, 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.*