RS vs SmartMTR for FlexRadio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RS
This app expands D-STAR transceiver capabilities over the internet using Terminal or Access Point modes. It allows communication even outside of repeater range by routing signals through your device via cellular or Wi-Fi networks.
- Terminal mode for internet-based transceiver communication
- Access Point mode to function as a Wireless LAN access point
- Expands D-STAR capabilities beyond repeater range
- Utilizes internet, LTE, or 5G networks for signal transmission
- Requires public IP address for gateway operation
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[Features] The RS-MS3I is an iPhone or iPad application designed to expand the DV mode capability of a D-STAR transceiver using a Terminal or an Access Point mode. These modes enable D-STAR operations by sending signals from the D-STAR transceiver over the Internet, even when that transceiver is out of the range of a D-STAR repeater. The transceiver sends your voice signals using an Internet, LTE, or 5G network, through an iPhone or iPad. 1. Terminal mode By operating the D-STAR transceiver through the iPhone or iPad, you can contact other D-STAR transceivers. In the Terminal mode, the transceiver will not transmit an RF signal, even if [PTT] is held down, because the microphone audio signal is transmitted through an Internet, LTE, or 5G network. 2. Access Point mode In this mode, the D-STAR transceiver functions as a Wireless LAN access point. The D-STAR transceiver repeats the received signal from the iPhone or iPad, to other D-STAR transceivers. Refer to the instruction manual (PDF) for setting details. The instruction manual can be downloaded from the ICOM website. (URL: https://www.icomjapan.com/support/manual/) [Device requirements] iOS15 or later [Usable transceivers] (As of March 2026) - ID-52A PLUS or ID-52E PLUS Note: - This application operates on iPhone or iPad as a gateway server on the D-STAR system. Therefore, a public IP address must be set on either the iPhone, iPad, or the Wireless LAN router. - Ask your mobile carrier or ISP for a public IP address. According to the contract, communication charges and/or communication packet limits may occur. - Ask your mobile carrier, ISP, or manufacturer of your iPhone, iPad, or router about public IP setting details. - Icom does not guarantee that the RS-MS3I works on all iPhone and iPad. It may not work properly, depending on the OS version, installed applications, or other reasons. - When a Bluetooth headset is connected to the transceiver, depending on the combination of your iPhone or iPad and the Bluetooth headset, sound may be interrupted, and communication may not be possible. In such cases, please disconnect the Bluetooth headset before use. - Turn OFF the Wireless LAN function when communicating through an LTE or 5G network. - Operate your transceiver with the RS-MS3I in compliance with appropriate regulations. - Icom recommends that you operate them with a club station license.
SmartMTR for FlexRadio
Transform your iOS device into a precise S-meter and control panel for FlexRadio transceivers. Monitor signal levels, adjust DSP filters, and control radio functions with intuitive gestures. Includes a demo mode for exploration.
- Precision S-meter with arc-band indicator
- Dual-slice display for simultaneous monitoring
- TX meters for RF Power, SWR, and Compression
- Intuitive swipe gestures for radio control
- Comprehensive DSP filter adjustments
- Demo mode for exploration
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Turn your iPhone or iPad into a precision S-meter and control panel for your FlexRadio 6000 or 8000 series transceiver. SmartMTR connects to your radio over the local network and displays real-time signal levels on a sweeping arc indicator with smooth ballistic animation. Monitor two slices at once, control your radio with intuitive swipe gestures, and fine-tune DSP filters — all from your iOS device. PRECISION S-METER - Arc-band indicator with realistic ballistics — fast attack, slow decay - Dual-slice display: Slice A and Slice B shown simultaneously - S1 to S9+60 dB scale with accurate dBm readout - Signal extremes tracking with adjustable time window - 30-second signal history chart TX METERS - RF Power gauge (120W or 600W scale) - SWR meter - Compression meter - Mic level meter RADIO CONTROL - Tune frequency with swipe gestures — MHz, kHz, and Hz - Switch modes: CW, LSB, USB, AM, FM, NFM - Select RX and TX antennas - Adjust RX filter width - Band stacking with per-slice memory DSP FILTERS - Squelch and volume control - AGC mode and threshold - Noise blankers: NB, WNB - Noise reduction: NR, NRL, NRS, NRF, RNN - Notch filters: ANF, ANFL, ANFT WORKS WITH - FlexRadio 6000 or 8000 series Requires a FlexRadio transceiver on the same local network. Try the built-in demo mode to explore the app without a radio. Terms of Use: https://smartmtr.net/terms.html Privacy Policy: https://smartmtr.net/privacy-policy.html
Screenshots
Verdict
The clearest difference is review sentiment: SmartMTR for FlexRadio at 100% against RS's 14%. SmartMTR for FlexRadio also leads on rating (4.0 vs 2.4) and update cadence (every 5 weeks vs every 4 months). RS's advantage is in-app purchases (none vs 1) and ratings volume (5 vs 1). On price, ads and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. SmartMTR for FlexRadio sells 1 in-app purchase, starting at $2.99 per month. RS asks for nothing beyond the download.
SmartMTR for FlexRadio holds the better App Store score, 4.0 against 2.4. That said, the two scores are not equally well evidenced: RS has 5 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 14% of RS's written reviews are positive against 100% of SmartMTR for FlexRadio's.
RS ships an update every 4 months, SmartMTR for FlexRadio every 5 weeks. The most recent releases landed on October 24, 2026 and October 1, 2026 respectively.
| Parameter | RS | SmartMTR for FlexRadio |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (5 ratings) | 4.0 (1 ratings) — better |
| Positive reviews | 14.3% of reviews | 100.0% of reviews — better |
| Number of ratings | 5 — better | 1 |
| Update frequency | Every 4 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Requires iOS | 15.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 2 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | ICOM INCORPORATED | Dariusz Socha |
Customer experience
RS
SmartMTR for FlexRadio
In-app purchases
RS
No in-app purchases
SmartMTR for FlexRadio
- SmartMTR7 Days trial$2.991 Month









