SatRadio vs RST Scope
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SatRadio
This app provides essential tools for radio and satellite communication engineers. It includes calculators and analysis features for antenna parameters, frequency calculations, link budgets, and modem performance. It also offers miscellaneous utilities for RF engineering tasks.
- Dish antenna analysis (axial ratio, gain, line of sight)
- Frequency calculations (phase noise, doppler, wavelength)
- Radio link analysis (coaxial losses, mismatch losses, EIRP)
- Modem performance metrics (C/N, C/I, PER, BER)
- Miscellaneous RF engineering utilities (dB calculator, converters)
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Some tools often needed in radio & satcom engineering : - dish antenna : axial ratio, gain from X/Y apertures, line of sight mask, radiation pattern, factor of merit G/T, main lobe aperture, off-axis radiation, temperature, wind deflection - frequency : phase noise, doppler, phase modulation index, wave length - links : on-axis radiation, coaxial losses, individual radio link, mismatch losses, on-axis transmitter EIRP link, waveguide, optical fibers - modem : C/N & C/I, PER & BER, phase noise contribution, PSK waveform - miscellaneous : AM & PM, cooling, dB & %, dB calculator, degrees converter, electrical field, heading & distance, graceful degradation, group delay, IM3-IP3-NPR, power conversion, RF link availability, noise factor
RST Scope
This utility app provides spectrum scope and waterfall displays for amateur radio operators. It enhances radios lacking these features by analyzing microphone input, allowing for clear distinction of Morse code and detailed audio frequency visualization.
- Spectrum scope and waterfall display
- Morse code distinction via FFT
- Adjustable waterfall speed
- Adjustable audio input level
- Switchable display band (wide/narrow)
- Display pause function
- Recording and playback of input sound
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This is an app for amateur radio operators with a narrow band of audio frequency, spectrum scope & waterfall display. You can get a rich display by microphone inputting the speaker output of a radio that does not have a spectrum scope or waterfall function. The FFT allows you to distinguish between the dot and dash of Morse code. [function] 1. Ability to change the speed of the waterfall 2. Ability to adjust the level of audio input 3. Function to switch the display band between wide and narrow 4. Display pause function (pause / cancel by touching the screen) 5. Function to switch the cross hatch ON / OFF by longTap 6. Frequency resolution is fixed at 40Hz. 7. Function to switch the USB/LSB by Left/Right Swipe 8.Recording/Playback function of Input Sound RST Scope(Free) https://www.youtube.com/watch?v=1s9RvOFp52g
Screenshots
Verdict
The clearest difference is ads: SatRadio at none against RST Scope's shown. SatRadio also leads on monetization model (free vs ad-supported) and iOS requirement (12.4 vs 15.6). RST Scope's advantage is update cadence (every 3 days vs every 10 months). On price, rating, ratings volume and in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
On the App Store both sit at effectively the same score — 5.0 for SatRadio against 5.0 for RST Scope. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
SatRadio ships an update every 10 months, RST Scope every 3 days. The most recent releases landed on October 5, 2026 and October 13, 2026 respectively.
| Parameter | SatRadio | RST Scope |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Number of ratings | 1 | 1 |
| Update frequency | Every 10 months | Every 3 days — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.4 — better | 15.6 |
| Further details — not scored | ||
| Size | 8 MB | 5 MB |
| Age rating | 17+ | 4+ |
| Developer | Dioptase | koji kamogawa |
Customer experience
SatRadio
RST Scope
In-app purchases
SatRadio
No in-app purchases
RST Scope
No in-app purchases
