# RT620

> RT620 (iPhone/iPad app by Radiance Instruments Ltd.)

- Source: https://appshunter.io/ios/app/rt620/id6758743234 (this page in markdown: same URL + `.md`)
- Developer: [Radiance Instruments Ltd](https://appshunter.io/developer/1239283044)
- Category: Utilities, Lifestyle
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 28 MB
- Languages: American English
- Released: 2026-02-13
- Data updated: 2026-08-19
- User reviews in markdown: https://appshunter.io/ios/app/rt620/id6758743234/reviews.md

## What is RT620?

RT620 is an application that obtains temperature data via a Bluetooth connection. Use the APP and connect Bluetooth to obtain data. You can directly obtain real-time temperature data and read SD card files by Bluetooth. Remote data viewing and firmware upgrade can be realized. 
Note that this application needs to be connected to a dedicated Bluetooth device for use together.


## Version history (last 5 releases)

### 1.2.3 — 2026-08-17

1.Update the alarm function
2.Optimize the functional parameters and UI of the setting interface
3.Fix some known issues

### 1.2.2 — 2026-06-26

1. Fix the Enable Indication service CCCD;
2. Adjust the logic for reading pdf and csv files;
3. Update the list of Bluetooth connection failure issues;
4. Fix some other known issues

### 1.2.1 — 2026-05-29

1. Update high and low temperature alarms
2. Optimize the default interval time of the setting interface to 0.5 seconds
3. Set the range values for high and low temperatures
4. Fix the work capacity status of pdf and csv files
5. Fix some known issues

### 1.1.7 — 2026-03-24

1. Update the file deletion command and optimize it.
2. Fix known issues

### 1.1.6 — 2026-03-03

1. Fixed the issue of checking for version updates
2.Update the issue of file reading and sending instructions

## More apps by Radiance Instruments Ltd

- [iBlueTool](https://appshunter.io/ios/app/ibluetool/id1239283045)
- [iBWTool](https://appshunter.io/ios/app/ibwtool/id1415585754)
- [RDTTool](https://appshunter.io/ios/app/rdttool/id1441094724)
- [AccuTherm](https://appshunter.io/ios/app/accutherm/id1481159461)
- [RilTempCore](https://appshunter.io/ios/app/riltempcore/id1507495831)
- [SC-500](https://appshunter.io/ios/app/sc-500/id6450296033)

All apps by Radiance Instruments Ltd: https://appshunter.io/developer/1239283044

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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 2026-08-19.*