Comparison

U vs Bluetooth

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

U

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
Read full description

The U-Smart application manages and controls your smart home built with UMAX U-Smart devices. You can easily control and share your smart home devices with other members of your household. Among the UMAX U-Smart devices you can find smart sockets with energy measurement, LED RGB Bulbs, night lamps, security IP cameras, door sensors, motion sensors, smoke and gas sensors, and others. What are you waiting for? Your smart home is here!

About

Bluetooth

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
Read full description

Bluetooth-rgb is a kind of intelligent underwater lamp control software based on Bluetooth 4.0. Using the software, you can control your underwater light products from your mobile phone, including basic control, color mixing, light effect, music rhythm, group management and other functions Functional features 1. Basic remote control Switch, brightness adjustment, support RGBCW, magic lights 2, color Gradient palette: The RGB gradient palette provides users with more color choices, including low-saturation colors and high-saturation colors Solid color ring: Through the RGB solid color ring to select the color, the color plate will be more bright and full CCT color plate: Use yellow and white gradient plate to adjust the color temperature W color plate: Use the black and white gradient plate to adjust the brightness of the device Precise color adjustment: Precise adjustment of RGB parameters to change the color of the device 3, lighting effects The APP provides dozens of light effect modes for users to choose, such as gradient, stroboscopic, breathing, monochromatic jump, etc. Users can adjust the brightness and speed in this mode 4. Music mode The APP plays music, and the lights can move according to the rhythm of the music 5, rhythm The microphone can be switched through APP mode and built-in mode to collect sound signals, and the light can rhythm along with the sound signals. At the same time, rich rhythm modes are provided for users to choose 6. Group management You can customize management groups, allowing you to manage devices in multiple areas more easily

Screenshots

U4 screens
Bluetooth4 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard4 real differences · 6 level
U versus Bluetooth: the parameters behind the verdict, then further details
ParameterUBluetooth
PriceFreeFree
Rating4.4 (9 ratings) — better3.7 (3 ratings)
Positive reviews33.3% of reviews—
Number of ratings9 — better3
Update frequencyEvery 2 monthsEvery 10 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationFreeFree
DevicesiPhone, iPodiPhone, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size200 MB52 MB
Age rating4+4+
DeveloperUmax Czech a.s.胜炎 陈

Customer experience

U

All ratings10 ratings
Positive90.0%
Neutral0.0%
Negative10.0%
Written reviews9 reviews
Positive33.3%
Neutral11.1%
Negative55.6%

Bluetooth

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

U

No in-app purchases

None

Bluetooth

No in-app purchases

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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