# UM_Meter — USB 测试仪

> Bluetooth USB tester data display, storage, and sharing utility. (iPhone/iPad app by 亮亮 刘.)

- Source: https://appshunter.io/ios/app/um-meter/id1439150213 (this page in markdown: same URL + `.md`)
- Developer: [亮亮 刘](https://appshunter.io/developer/1439150212)
- Category: Utilities
- Price: Free
- Rating: 2.40/5 from 17 App Store ratings · 73 written reviews indexed
- Age rating: 4+
- Requires: iOS 8.0 · 29 MB
- Languages: American English, Czech, Dutch, French (France), German (Germany), Hindi, Hungarian, Indonesian, Japanese, Korean and 10 more
- Released: 2018-10-19
- Data updated: 2026-06-11
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/um-meter/id1439150213/reviews.md

## What is UM_Meter?

Data display and system operation of the USB tester via Bluetooth, and data storage and sharing functions.

## Key features

- Bluetooth connectivity to USB tester
- Real-time data display
- System operation monitoring
- Data storage
- Data sharing

## Recent user reviews (10 of 73)

All indexed reviews: https://appshunter.io/ios/app/um-meter/id1439150213/reviews.md

### 1/5 — iOS not!

*2026-04-01, version 1.2.1*

If it’s too good to be true, it probably is! App won’t even open! Manual available with QR Code is only for Android, not iOS! Looks like I’ve been suckered!

### 1/5 — App throws ads in your face every time you launch it & is no longer maintained.

*2024-12-11*

This app luckily still works in 2024 on ios 18.2 but it doesn’t fit any phone screen made in the last few years. It can’t even fit the voltage and current graph on the screen, you need to SCROLL the graph to see either reading.
The ads are also super annoying, I often launch the app after having it closed for some time then have to wait for the add to skip before getting to do anything. Do not buy any power meter that advertises THIS as its IOS app. I’m gonna work on an open source one myself and put it on github. maybe even the app store

### 1/5 — Used to Work Great

*2024-11-11, version 1.2.1*

The app hasn’t been updated in 5 years. As such, it no longer connects to my UM34C. Looking at the reviews, it looks like it doesn’t work with anything running on a remotely modern IOS release. It is now effectively useless. They need to update this app.

### 1/5 — Trash app

*2023-10-18, version 1.2.1*

Doesn't even load. Just shows a black screen and crashes

### 1/5 — black Screen

*2023-09-06, version 1.2.1*

schwarzer Bildschirm und App stürzt ab.

### 1/5 — Doesn’t work on the UD18_BLE

*2023-06-18, version 1.2.1*

Doesn’t work on the UD18_BLE

### 4/5 — Great App

*2022-08-08, version 1.2.1*

I like this app, works perfectly in iPhone12+. Bluetooth links to the USB reader without an issue. Only small update on the chart title - please change spelling Gragh to Graph :)

### 1/5 — Not working

*2022-08-06, version 1.2.1*

Not work on iOS 15.6

### 1/5 — App does not work AT ALL!!!

*2022-07-08, version 1.2.1*

Update this app!! Or all of your products are useless...

### 4/5 — Funktioniert immer noch (iOS 15.5)

*2022-06-02, version 1.2.1*

App startet mit schwarzem Bildschirm, da muss man ein paar Sekunden warten.
Ansonsten scheint alles zu funktionieren, sogar der Export (habe ich erst nach Sprachumstellung auf englisch entdeckt :)

## Frequently asked questions about UM_Meter

### What does UM_Meter do?

UM_Meter connects to a USB tester via Bluetooth to display data and system operations. It also allows for data storage and sharing.

### Is UM_Meter free to use?

Yes, UM_Meter is available for free and does not have any in-app purchases.

### What devices does UM_Meter support?

UM_Meter is supported on iPhone and iPod devices.

### How often is UM_Meter updated?

The latest version of UM_Meter was released on July 23, 2019. The app was initially released on October 19, 2018.

### What is the age rating for UM_Meter?

UM_Meter has an age rating of 4+, making it suitable for a wide range of users.

### What is the user rating for UM_Meter?

UM_Meter has a rating of 2.4 stars based on 17 ratings.

### Does UM_Meter have ads?

No, UM_Meter does not contain advertisements.

## Version history (last 5 releases)

### 1.2.1 — 2019-07-23

1. Add Bluetooth connection icon button to replace the original text button
2. Optimize internal procedures

### 1.2.0 — 2018-10-29

1.Optimize the curve display function, increase the Y-axis zoom function, and automatically adapt to the voltage curve size change
2.Optimize Excel storage display interface
3. Improve program display interface layout, optimize control drag control

### 1.1.2 — 2018-10-24

1.更改上一版字符排列的错误
  Change the previous character's character arrangement error.
2.增添页面支持语言
  Add page support language.

### 1.1 — 2018-10-22

Suitable for the new Bluetooth module UM25C、UM34C

### 1.0 — 2018-10-18

No release notes.

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## More apps by 亮亮 刘

- [TC66C](https://appshunter.io/ios/app/tc66c/id1445111707)
- [RdPower](https://appshunter.io/ios/app/rdpower/id1485849488)
- [RuiDeng](https://appshunter.io/ios/app/ruideng/id1550070005)

All apps by 亮亮 刘: https://appshunter.io/developer/1439150212

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-11.*