SonusVue vs RST Scope
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SonusVue
This utility analyzes real-time audio frequencies, allowing users to record, play back, and visualize sound signals. It offers adjustable sampling rates and detailed spectrum display options, including logarithmic scales and FFT resolution.
- Real-time frequency analysis
- Record and playback audio
- Adjustable sampling frequency
- Logarithmic scale spectrum display
- Configurable FFT resolution
- User-configurable spectrum averaging
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Real time frequency/spectrum analyzer allows you to record and play back the recordings while observing time signal and frequency spectrum in real time. The sampling frequency can be adjusted by the user. It starts at 200Hz and goes up to 44.1kHz. The recorded files can be deleted, if desired, from the app. The spectrum can be displayed in logarithmic scale (dB), with user specified number number of points of FFT (resolution), interpolation factor, integrated or differentiated and with various windowing functions. User configurable spectrum averaging is available. The app requires login information from IRISS Inc.
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 rating: RST Scope at 5.0 against SonusVue's 1.0. RST Scope also leads on update cadence (every 3 days vs every 18 months). SonusVue's advantage is ads (none vs shown) and monetization model (free vs ad-supported). On price, ratings volume, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
RST Scope holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively.
SonusVue ships an update every 18 months, RST Scope every 3 days. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | SonusVue | RST Scope |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (1 ratings) | 5.0 (1 ratings) — better |
| Positive reviews | 0.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Every 18 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 | 11.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 31 MB | 5 MB |
| Age rating | 4+ | 4+ |
| Developer | IRISS Inc | koji kamogawa |
Customer experience
SonusVue
RST Scope
In-app purchases
SonusVue
No in-app purchases
RST Scope
No in-app purchases
