# U vs Bluetooth

The clearest difference is rating: U at 4.4 against Bluetooth's 3.7. U also leads on ratings volume (9 vs 3) and iOS requirement (13.0 vs 15.6). Bluetooth's advantage is update cadence (every 10 days vs every 2 months). 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.

U holds the better App Store score, 4.4 against 3.7. Both are backed by a comparable volume of ratings — 9 and 3 respectively.

U ships an update every 2 months, Bluetooth every 10 days. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | U | Bluetooth |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (9 ratings)](https://appshunter.io/ios/app/u-smart/id1444766879/reviews)** | [3.7 (3 ratings)](https://appshunter.io/ios/app/bluetooth-rgb/id6443482025/reviews) |
| Number of ratings | **9** | 3 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | Free | Free |
| Size | 200 MB | 52 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Umax Czech a.s.](https://appshunter.io/developer/1444766878) | [胜炎 陈](https://appshunter.io/developer/1646214882) |

## What reviewers say

### U

[App page](https://appshunter.io/ios/app/u-smart/id1444766879)

Control and manage your smart home devices from a single application. Easily share access with household members and monitor various UMAX U-Smart devices like cameras, sensors, and lighting.

**Highlights:** Remote device control, Household member sharing, Energy measurement sockets, Security camera monitoring, Sensor integration (motion, smoke, gas), Smart lighting control

**Features:** macOS Compatibility

**In-app purchases:** none


### Bluetooth

[App page](https://appshunter.io/ios/app/bluetooth-rgb/id6443482025)

Control intelligent underwater lamps via Bluetooth from your phone. Adjust colors, brightness, and select from various lighting effects and music synchronization modes. Manage multiple devices in groups for easier control.

**Highlights:** Basic remote control (switch, brightness), RGBCW and magic light support, Color palette and precise color adjustment, Dozens of light effect modes, Music rhythm synchronization, Group management for multiple devices

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is U free?

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

### Is Bluetooth free?

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

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

U is rated higher. U averages 4.4 out of 5 from 9 ratings, while Bluetooth averages 3.7 from 3 ratings.

### Do U or Bluetooth have ads?

Neither U nor Bluetooth shows ads.

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

U ships an update every 2 months, and Bluetooth every 10 days. Most recently, U was updated on November 2, 2026 and Bluetooth on November 3, 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.*