# T&D 500B Utility — For RTR500B Series Settings

> For RTR500B Series Settings (iPhone/iPad app by T&D Corporation.)

- Source: https://appshunter.io/ios/app/t-and-d-500b-utility/id1508458456 (this page in markdown: same URL + `.md`)
- Developer: [T&D Corporation](https://appshunter.io/developer/703327099)
- Category: Business, Utilities
- Price: Free
- Age rating: 4+
- Requires: iOS 17.0 · 58 MB
- Languages: English, Japanese
- Released: 2020-12-06
- Data updated: 2026-07-07
- User reviews in markdown: https://appshunter.io/ios/app/t-and-d-500b-utility/id1508458456/reviews.md

## What is T&D 500B Utility?

"T&D 500B Utility" is a setup application designed to be used with the Base Stations RTR500BW/RTR500BM and a smartphone/tablet.
Use this to carry out registration and setup of Base Units, Remote Units and Repeaters.
■ Features
- Settings for Nearby Devices via Bluetooth or Remote Devices via Cloud
- Remote Unit and Repeater Registration to the Base Unit
- Base Unit Network Settings
- Warning Settings and Data Transmission Settings
- Starting Recording
- Operation Log, etc
■ Compatible Devices
- RTR500BW (Base Unit)
- RTR500BM (Base Unit)
- RTR500B Series Data Loggers (Remote Units): RTR501B/502B/503B/505B/507B including L-type
- RTR-500 Series Data Loggers (Remote Units): RTR-501/502/503/505/507S/574/576 including S-type and L-type
- RTR500BC (Repeater)


## Version history (last 5 releases)

### 1.24 — 2026-06-23

The App is now compatible with iOS 26. iOS 16 and below are no longer supported.
Fixed a problem that occurred when only "Contact Input" was selected as the condition for RTR500BM's Warning Contact Output, where the Contact Output Setting was displayed as "OFF" on the Warning Settings screen.
Fixed a problem that caused abnormal application termination under certain conditions.

### 1.23 — 2025-02-25

Fixed a problem where the "Passcode Error" was displayed when changing the Remote Unit's passcode and turning off Bluetooth at the same time.
Fixed a problem where the screen layout was distorted when entering a scale conversion equation for RTR505B-P and RTR-505-P and returning to the previous screen.
Some changes have been made related to the Remote Unit Firmware Update. For details, please refer to the Software/Apps page of T&D website.

### 1.22 — 2024-11-14

Added a function to update the firmware of multiple Remote Units simultaneously.
In the registration process via Bluetooth, the Remote Unit's Bluetooth setting can no longer be turned off.

### 1.21 — 2024-10-04

The App is now compatible with iOS 18. iOS 15 and below are no longer supported.
Added the firmware update function for RTR501B/502B/503B/505B/507B.
Fixed minor spelling inconsistencies (e.g., "View/Register via optical com" changed to "View/Register via Optical Communication" in the View Device Settings and Device Registration menu.)

### 1.20 — 2023-08-24

When deleting a registered Remote Unit or Repeater from the Base Unit, the Remote Unit or Repeater is now initialized automatically.
Changed the supported iOS version to iOS14.0 or later.
Fixed a problem where RTR-500 (Overseas Model) was displayed as RTR-500C (Japanese Model).
Fixed a problem that occurred when changing RTR505B or RTR-505-V’s warning settings via T&D WebStorage Service, they were not displayed in the "View Pending Settings" screen.

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## More apps by T&D Corporation

- [T&D Thermo](https://appshunter.io/ios/app/t-and-d-thermo/id703327096)
- [ThermoStorage](https://appshunter.io/ios/app/thermostorage/id1187033057)
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- [TR4 Report](https://appshunter.io/ios/app/tr4-report/id1550000482)

All apps by T&D Corporation: https://appshunter.io/developer/703327099

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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 2026-07-07.*