SDR vs SmartMTR for FlexRadio
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SDR
Control your Icom transceiver remotely or locally from your iPhone. Operate in all modes, log QSOs, and utilize integrated digital modes like FT8/FT4 and SSTV. No extra hardware is needed for global access.
- Remote transceiver operation
- All mode control
- Auto logging logbook
- Integrated FT8/FT4 tool
- Integrated SSTV receiver
- Integrated CW decoder and keyer
- DX-Cluster integration
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Software Defined Radio Client for Icom Transceivers and your iPhone SDR-Control Mobile is a full featured iPhone App to operate your Icom Transceiver at home or from around the world without additional Hard- or Software. Important: This App requires one of the following Icom Transceivers: IC-705, IC-7610, IC-9700, IC-7760 or the IC-R8600 Receiver or the new IC-7300 MK2 FACTS AND FEATURES: ■ Native iOS 26 app, backward compatible to iOS 17 ■ Compatible with any iPhone ■ Complete operation of your Icom Transceiver in all modes ■ Use the App local or to remote access of your Transceiver from any place without additional Hard- or Software ■ Logbook with auto logging, ADIF Im-/Export ■ UDP Log submission when using external logging software ■ Integrated full featured FT8 / FT4 Tool ■ Integrated SSTV receiver (NEW) ■ Integrated CW Decoder ■ Integrated CW Keyer ■ DX-Cluster integration ■ Call sign lookup integrated ■ Displays Calls on Map with heading and distance information ■ And much more... WHAT YOU NEED: - An Icom IC-705, IC-7610, IC-9700 or IC-7760 Transceiver or IC-R8600 Receiver or the new IC-7300 MK2 - The Transceiver needs to be connected to your Network (WiFi or LAN) - No USB cable needed or supported - An iPhone that runs at least iOS 17 Find out more here: https://ham-radio-apps.com Read the Manual: http://go-to.me/sdrcontrol-mobile-manual
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 price: SmartMTR for FlexRadio at Free against SDR's $44.99. SmartMTR for FlexRadio also leads on review sentiment (100% vs 84%) and device support (3 vs 1). SDR's advantage is rating (4.5 vs 4.0) and in-app purchases (none vs 1). On ads 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
SmartMTR for FlexRadio is free to download; SDR costs $44.99 up front. SmartMTR for FlexRadio sells 1 in-app purchase, starting at $2.99 per month. SDR asks for nothing beyond the download.
SDR holds the better App Store score, 4.5 against 4.0. That said, the two scores are not equally well evidenced: SDR has 64 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 84% of SDR's written reviews are positive against 100% of SmartMTR for FlexRadio's, so the app with the better star average is not the one people write more warmly about.
SDR ships an update every 2 weeks, SmartMTR for FlexRadio every 5 weeks. The most recent releases landed on October 20, 2026 and October 1, 2026 respectively.
| Parameter | SDR | SmartMTR for FlexRadio |
|---|---|---|
| Price | $44.99 | Free — better |
| Rating | 4.5 (64 ratings) — better | 4.0 (1 ratings) |
| Positive reviews | 84.1% of reviews | 100.0% of reviews — better |
| Number of ratings | 64 — better | 1 |
| Update frequency | Every 2 weeks — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | #114 — better | — |
| Devices | iPhone | iPhone, iPad, Mac — better |
| Requires iOS | 17.6 — better | 26.2 |
| Further details — not scored | ||
| Size | 47 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Marcus Roskosch | Dariusz Socha |
Customer experience
SDR
SmartMTR for FlexRadio
Bugs and requests
SDR
Reported bugs
12 issues- Dialogs do not scale with larger text setting
- Frequency display overlaps buttons
- FT8 decoding issues (lower signal levels than WSJTX)
- App crashes and leaves radio in transmit
- Logbook export not functional after update
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- Function button for horizontal scrolling not fully displayed
- FT8 decode is useless and unreliable
- Messed up radio, requiring reset
- RX audio unusable outside home network (prior to 1.5.1)
- Struggles with audio RX packets on remote cellular networks
- Cannot work over mobile data with certain carriers (EE)
- FT8 alerts sound but don't display
Requested features
14 requests- Develop for IC-7800
- CarPlay support
- Apple Watch add-on
- Windows version
- JS8call support
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- More digital modes
- Display memory bank names
- Initiate memory scan from app
- WSPR implementation
- Tool for WSPR
- More FT8/FT4 features (e.g., setting transmit frequency directly in FT8 view)
- Send image to unit
- KISS TNC support
- Control digital modes (reflectors, etc.)
SmartMTR for FlexRadio
Not enough reviews yet to summarise bugs or requests.
In-app purchases
SDR
No in-app purchases
SmartMTR for FlexRadio
- SmartMTR7 Days trial$2.991 Month









