Enhance Your D-STAR Experience with iOS™ App

The RS-MS1I (for iOS™ devices) lets your D-STAR transceiver wirelessly connect to a D-STAR transceiver and remotely set the DR functions, link with a map app and send/receive messages in the DV mode. In addition, pictures on an iOS™ device can be transmitted in the DV Fast Data mode or DV mode.

Share Pictures

Share Pictures Example
(Photo shows the RS-MS1A)

You can take pictures with your iOS™ device, or use stored pictures, and share them. Pictures of your shack, operating place in the field, rigs, or friends can be sent to other D-STAR transceivers that are also using the app.

Add images and make QSOs even more enjoyable.

Pictures can be sent in the DV Fast Data mode or conventional DV mode (with voice).

Text Messaging

Text messaging example
(Photo shows the RS-MS1A)

Text messaging enables you to chat with other D-STAR users that are using the app. Use the function when texiting is better than exchanging information over voice. By using iOS™ device, you can exchange messages in your preferred language.

DR Functions and Remote Setting

DR Mode example
(Photo shows the RS-MS1A)

You can set the transceiver’s “FROM” and “TO” fields and change some of the transceiver’s function settings from your iOS™ device. When using with the optional VS-3 Bluetooth® headset, you can wirelessly talk through the IC-705 or ID-4100A/E from a short distance* away from your rig.

* Communication range of Bluetooth® is approximately 10 meters (33 feet).

D-STAR Stations and Repeater Sites Mapping

Repeater Map Example
©2017 Google - Map data
©2017 ZENRIN, Google
(Photo shows the RS-MS1A)

See the location of other stations or repeater sites on a map using received position data. The transceiver’s “FROM” and “TO” can be automatically set by tapping a repeater site or a D-PRS station on the map.

Repeater List Viewer

You can see detailed repeater information, including frequencies, call signs and frequency offsets in the Repeater list.

You can use it to manually set your transceiver when you are in a different area from your usual operating environment.

Call Sign List

The app enables you to edit call signs and names used in the DR function. Also, you can add a call sign and a name in the Call sign list at any time.

Receive History

In the DV mode, you can read and edit the received station’s information. Additional information from an Internet database, such as or, can be downloaded.

Import and Export

You can import a user-programmable repeater list or a repeater list, on the Internet, from a PC to the app. In addition, receive history can be exported from the app to a PC.

Function Comparison Chart

Transceivers ID-4100 A/E



Bluetooth® Connection UT-137 
Bluetooth® UNIT required
DV Fast Data Mode *1 *1
DR Function
Share Pictures
Text Messaging
Offline Map N/A N/A
RX History
Your Call Sign
Repeater List
Transceiver Setting
App Setting
USB Connection N/A N/A

*1 When sending or receiving pictures using “DV Fast Data Mode,” the headset audio will be temporarily interrupted because of the transceiver’s Bluetooth® unit limitations.
*2 The latest firmware version is required.


Operating System

iOS version 12 or later
iPadOS version 13 or later

Note UT-137 Bluetooth® unit is required for the ID-4100A/E.

* The RS-MS1I may not work, depending on the OS version, installed applications, and so on.



For iPhone users

Bluetooth® connection has not been tested for all Bluetooth® compatible devices with this product. This does not guarantee that all devices will work with this product.


  • UT-137

  • RS-MS1I

Catalogs / Brochures

Brochures Name Size

Instruction Manual / Guides

Name Model Name Note
D-STAR Application Guide ID-52A/ID-52E/IC-705/IC-905/IC-9700/IC-7100/ID-4100E/ID-4100A/ID-5100E/ID-5100A/ID-51E/ID-51A/ID-31E/ID-31A/ID-31E PLUS/ID-31A PLUS/RS-MS1A/RS-MS1I/RS-MS3A/ST-4001A/ST-4001I/ID-50A/ID-50E
Instructions RS-MS1I