# RS-MS1I > Mobile transceiver control, communication, and data management application. (iPhone/iPad app by ICOM INCORPORATED.) - Source: https://appshunter.io/ios/app/rs-ms1i/id1193842632 (this page in markdown: same URL + `.md`) - Developer: [ICOM INCORPORATED](https://appshunter.io/developer/1193842631) - Category: Utilities - Price: Free - Rating: 1.91/5 from 74 App Store ratings · 64 written reviews indexed - Age rating: 4+ - Requires: iOS 16.0 · 34 MB - Languages: English, Japanese - Released: 2017-03-31 - Data updated: 2026-08-28 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/rs-ms1i/id1193842632/reviews.md ## What is RS? Functional overview of the application DR functions You can use some transceiver’s DR functions. Share pictures Send and receive voice and pictures. Map See the location of repeater sites or other stations on a map using received position data, or your transceiver’s repeater list. Automatically set the transceiver’s “FROM” and “TO” fields by tapping a repeater site or a station on the map. Receive History In the DV mode, read and edit the received station’s information. Download additional information from an Internet database, such as QRZ.com or APRS.fi. Text messaging Send and receive text messages. Call Sign list 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. Repeater list See the detailed data entered in the Repeater list. Transceiver settings Change some of the transceiver’s function settings. Application settings Select application software settings. Import Import a Repeater list or a Call Sign list. Export Export a Repeater list, a Call Sign list, or Receive History. See the transceiver’s instruction manual for details. The instruction manual can be downloaded from the ICOM web site. Device requirements The RS-MS1I operating requirements are as follows: iOS16 or later Usable transceivers (As of May 2026) - ID-4100A/E + Bluetooth unit (UT-137) - ID-52A or ID-52E *1 - ID-52A PLUS or ID-52E PLUS *2 - ID-5200A or ID-5200E *3 - IC-705 *4 *1 Supported in RS-MS1I Ver.1.1.0 or later. *2 Supported in RS-MS1I Ver.1.3.0 or later. *3 Supported in RS-MS1I Ver.1.4.0 or later. *4 Supported in RS-MS1I Ver.1.2.0 or later. Preparation To use the RS-MS1I with a supported transceiver, you need an optional Bluetooth unit. See your transceiver’s instruction manual for details. Transceiver’s settings Set the following functions as shown below to use the RS-MS1I. [Function] > [CI-V] > [CI-V Transceive]: ON [Bluetooth Set] > [Data Device Set] > [Serial Port Function]: CI-V (Echo back OFF) Note: - The RS-MS1I may not work with all iPhones or iPads, even if they are one of the tested devices. This is because an application program on your device may conflict with the RS-MS1I. - The RS-MS1I may not be used, depending on the OS version, installed application, and so on. - Bluetooth LE is used for the connection with the transceiver, so there may be a time delay between the transceiver’s operation and the display on the iPhone or iPad. - When sending or receiving pictures using “FAST mode,” the headset audio will be temporarily interrupted because of the transceiver’s Bluetooth unit limitations. - You may need to connect to the Internet through a Wireless LAN, an LTE network or a 5G network for some functions. - The RS-MS1I supports only portrait orientation with the iPhone. It does not support Auto Rotate. However, landscape orientation and Auto Rotate are supported with the iPad. ## Key features - Transceiver DR functions - Send and receive voice and pictures - Map repeater and station locations - Read and edit received station information - Send and receive text messages - Manage call sign and repeater lists - Import/Export data ## What do users think of RS? Overall sentiment: negative **Pros** - 👍 Works with IC-705 - 👍 Works with ID-52 - 👍 Map feature useful - 👍 Past contacts visible - 👍 Quick bug fixes **Cons** - 🐛 Crashes on map screen - 🐛 Crashes when sending photos - 🐛 Bluetooth connectivity issues - 🐛 Not connecting to ID-52 - 🐛 Not connecting to iPhone - 🐛 Not supported on ID-50 - 🐛 Not supported on ID-5100 - 🐛 Not supported on ID-51A Plus 2 - 🐛 Poor repeater list - 🐛 Outdated data - 🐛 Incompatible with iOS versions - 🐛 Counter-intuitive pairing - 🐛 Useless without Bluetooth - 🐛 Limited functionality - 🐛 No Wi-Fi support - 🐛 Japanese as default language **Commonly reported bugs** - App crashes when using map function - App crashes on map screen - App closes when opening map - Not staying connected to the app - Connection unsuccessful error message - Bluetooth pairing not working - Connects and immediately disconnects - Does not download full repeater list - Bluetooth connection fails - App crashes when selecting a picture to send - Photo import force closes app - App bombing out when trying to add a photo - Attempting to transfer photos crashes every time - Cannot get app to pair - App sees radio but won't connect - App won't connect - Cannot connect app to iPhone - ID-52A not pairing - App instantly sees device but fails to connect - Bluetooth connection does not happen - App crashes trying to share photo - App picture send capability is INOP - App force closes / crashes on photo import - Cannot get it to connect on either device - App doesn't work with ICOM ID-5100 - App doesn't work with 4100 on iOS 15 - App doesn't work with iPhone 6s+ - Bluetooth connection does not happen after lengthy labours - App has not been updated in almost a year **Most requested features** - Add support for ID-5100 - Add support for ID-51A Plus 2 - Add support for ID-50 - Add support for IC-705 - Improve repeater list - Import repeater lists via Files/OneDrive/Dropbox - Serial port support via USB - Add support for ID-4100A with BT module - Add support for IC-2820 - Update for iOS 15 - Update for iOS 16 - Update for iOS 18 ## Recent user reviews (10 of 64) All indexed reviews: https://appshunter.io/ios/app/rs-ms1i/id1193842632/reviews.md ### 3/5 — Nice basic app *2026-06-13* This app has worked well in the past with my ID-52 but lately it has started crashing when I use the map function to see a station location. Annoying ### 1/5 — App crashes on map screen *2026-04-04* This app works for everything except when on the map screen. The entire application will crash when looking at the map section. Icom needs to fix this. ### 4/5 — Almost perfect. App closes when opening the map and moving about. Annoying! *2026-01-30* App closes when opening map! Annoying. ### 1/5 — Fails with ID-52A Plus on iPhone 16 and iPad Pro *2025-06-05, version 1.30* Update, 2025-06-05. Got further along but still not staying connected to the app. I was mistakingly trying to pair using the iPhone’s Settings: Bluetooth: Pair. However; just using the ID-52A Plus’s Bluetooth pairing function and then pair in the RS-MS1Ii app. It says paired but then a notification on the iPhone says not connected. Tried numerous iterations of settings from YouTubers but no luck. This app, as advertised by Icom for the ID-52A Plus, does not work for my iPhone 16 Pro and iPad Pro. This is the major reason I upgraded from ID-51A. Bluetooth is a very mature and well understood technology and so there is no excuse for Icom to not fix this ongoing problem. ### 1/5 — Fails with ID-52A Plus on iPhone 16 and iPad Pro *2025-05-31* Error message on iPhone and iPad: “Connection Unsuccesful “ICOM BT(ID-52)” is not supported” Forget Device?” Bluetooth, as advertised by Icom for the ID-52A Plus does not work for my iPhone 16 Pro and iPad Pro. This is the major reason I upgraded from ID-51A. Bluetooth is a very mature and well understood technology and so there is no excuse for this failure to fix their error(s). ### 1/5 — Not for ID-50 *2025-05-26, version 1.30* It would not have been difficult to make this app function with a USB connection to an iPhone, but it is Bluetooth only, so it’s not compatible with the ID-50 ### 1/5 — iOS 18 does not work *2025-02-23, version 1.30* ID-52 and does not stay connected to iPhone 15 Pro on iOS 18 ### 5/5 — Once again quick fix from the Icom Devs *2024-12-20* I reported a connection bug a few weeks ago and the excellent devs from Icom knocked this out quickly. Thank you! Once again, I am an Icom user for life. Their support is second to none! ### 1/5 — Useless *2024-11-17* I bought the icon ID 52 plus completely unusable to program and now I’m out like 800 bucks wish I would’ve went with another brand. The only thing I can get the radio to do is whether an FM radio. ### 1/5 — Don’t bother- doesn’t work *2024-11-01, version 1.21* Clearly they no longer support this app. Bluetooth implementation no longer works. Android app works. Try that. ## Frequently asked questions about RS ### What does the RS-MS1I app do? The RS-MS1I app allows you to control compatible ICOM transceivers from your mobile device. You can send and receive voice and pictures, view station locations on a map, manage received station information, send text messages, and organize your call sign and repeater lists. ### What are the key features of the RS-MS1I app? Key features include controlling transceiver DR functions, sharing voice and pictures, mapping repeater and station locations, accessing and editing received station data, text messaging, managing call sign and repeater lists, and importing/exporting data. ### Is the RS-MS1I app free to use? Yes, the RS-MS1I application is free to download and use. There are no in-app purchases or advertisements mentioned in the provided description. ### What devices are compatible with the RS-MS1I app? The app requires iOS 12 or later. It is designed to work with specific ICOM transceivers, such as the ID-4100A/E, ID-52A/E, ID-52A PLUS/E PLUS, and IC-705, often requiring an optional Bluetooth unit for connection. ### How can I use the RS-MS1I app with my transceiver? To use the app, you need a supported transceiver and potentially an optional Bluetooth unit. You will also need to configure specific settings on your transceiver, such as enabling 'CI-V Transceive' and setting the 'Serial Port Function' for Bluetooth data. ## Version history (last 5 releases) ### 1.40 — 2026-07-17 - Supported with ID-5200A/E. - Supported the display of 10 GHz band repeaters. - Fixed a bug where the app would crash when displaying the map screen on devices running iOS 26 or iPadOS 26. ### 1.40 — 2026-07-17 - Supported with ID-5200A/E. - Supported the display of 10 GHz band repeaters. - Fixed a bug where the app would crash when displaying the map screen on devices running iOS 26 or iPadOS 26. ### 1.30 — 2024-11-22 - Supported with ID-52A/E PLUS. - Changed to allow a common Bluetooth pairing device. - Other minor changes. ### 1.21 — 2022-03-25 - Improved an issue that the app may crash when selecting a picture of the Share Pictures menu on iOS 15 devices. ### 1.20 — 2021-07-30 -Supported with IC-705. -Other minor changes. ## Apps similar to RS | App | Rating | Price | Category | | --- | --- | --- | --- | | [MISD Tip](https://appshunter.io/ios/app/misd-tip/id1440174120) | — | Free | Utilities | | [佐敦](https://appshunter.io/ios/app/id1448255140) | — | Free | Utilities | | [益电宝-数据改变未来](https://appshunter.io/ios/app/id1434796500) | — | Free | Utilities | | [HeatNext](https://appshunter.io/ios/app/heatnext/id1440372440) | — | Free | Utilities | | [GHIA KIDS](https://appshunter.io/ios/app/ghia-kids/id1434789680) | — | Free | Utilities | | [Omni Relprev](https://appshunter.io/ios/app/omni-relprev/id1434690340) | — | Free | Utilities | ## More apps by ICOM INCORPORATED - [RS-AERO1I](https://appshunter.io/ios/app/rs-aero1i/id1257985737) - [RS-R30I](https://appshunter.io/ios/app/rs-r30i/id1418395444) - [IP500APP](https://appshunter.io/ios/app/ip500app/id1476369389) - [ST-4001I](https://appshunter.io/ios/app/st-4001i/id1492225169) - [RS-M500](https://appshunter.io/ios/app/rs-m500/id1535899381) All apps by ICOM INCORPORATED: https://appshunter.io/developer/1193842631 ## Related topics [rfma app](https://appshunter.io/ios/topics/rfma-app) --- *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 2026-08-28.*