WebSDR vs Relic Waves
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
WebSDR
This Audio Unit plugin allows musicians to incorporate live radio broadcasts into their music. It accesses Software Defined Radio streams from servers worldwide, offering unique audio textures for performances and mixes.
- Plays Software Defined Radio streams
- Integrates live radio audio into music
- Accesses global radio servers
- Supports various radio modes (LSB, USB, CW, AM, FM)
- Provides unique audio textures for mixes
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WebSDR is an Audio Unit Plugin that plays audio from Software Defined Radio (SDR) streams. It allows you to incorporate the sound of live radio into a live music performance. WHAT IS SOFTWARE DEFINED RADIO? A software defined radio is a device with an antenna that connects to a computer and allows it to receive live radio broadcasts. It features a wide variety of protocols; in addition to standard AM and FM modes found in most consumer radios it typically includes modes for LSB, USB, CW and other settings used to listen in on the CB radios used by taxi drives, marine weather stations, air traffic control towers, amateur radio enthusiasts and many other types of radio broadcasts. The signals you can access using this app are not your own local radio stations; rather they are the radio stations in the vicinity of a collection of free servers, many of them operated by universities. These servers are positioned in many different countries around the world so using this plugin you can listen in on a variety of radio signals in a wide variety of languages and cultures. WHAT DO PEOPLE USE THIS PLUGIN FOR? The crackly sound of an old-style AM broadcast or a conversation between taxi drivers on a CB radio is a musical flavour that can not be replicated with other plugins. If you are looking for some really unique and interesting material to include in your performances or mixes, this plugin will supply. LIMITATIONS This plugin requires Javascript in order to play sound. Unfortunately that means that the UI must be open the entire time you are using it. When the UI is closed Javascript stops running, similar to the way a website stops playing audio when you close a tab in your browser. NOTE: THIS IS AN AUDIO UNIT PLUGIN. IT RUNS INSIDE A HOST APP SUCH AS GarageBand.
Relic Waves
Generate unique Lo-Fi sounds, pads, and effects using advanced synthesis algorithms. Explore billions of sonic possibilities with intuitive controls and real-time recording. Perfect for musicians and sound designers seeking experimental audio.
- Billions of unique Lo-Fi sounds
- Random sound generation with search
- Multiple keyboard input options
- Real-time audio recording to WAV
- Export to WAV, SunVox, and clipboard
- MIDI control and processing
- iOS Audio Unit Extension (AUv3)
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Relic Waves is a generator of Lo-Fi noises, pads and effects based on unique synthesis algorithms from NightRadio. More than 4 billion samples from the depths of the Mathematical Universe! Features: * search for new sounds with three buttons: next random set, edit code, previous set; each set of 12 sounds corresponds to a code of 8 characters; * three types of keyboards for live performing: on-screen buttons, PC keyboard, MIDI input; * several processing parameters + control via MIDI; * real-time audio recording to WAV (32-bit); * export to: WAV (one file or a set), SunVox (samples + effects in one file), text clipboard; * the LCK button freezes individual samples - they will not change during the search for new sets; * iOS Audio Unit Extension (AUv3). Double clicking on a parameter opens a window for setting the exact value. If you enable the Hold option, the notes will play endlessly, without reacting to key release (noteOff) events; turning the note on again works like turning it off; there are two ways to enable this option: 1) using the Hold parameter in the "MIDI Mapping" window; 2) by pressing the HOLD button, which appears in place of LCK while playing the musical keyboard: press HOLD, release the desired notes - then the released notes will continue to play.
Screenshots
Verdict
The clearest difference is review sentiment: Relic Waves at 100% against WebSDR's 21%. Relic Waves also leads on rating (5.0 vs 2.4) and price ($1.99 vs $5.99). On ratings volume, update cadence, ads 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
WebSDR costs $5.99 and Relic Waves $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Relic Waves holds the better App Store score, 5.0 against 2.4. Both are backed by a comparable volume of ratings — 27 and 42 respectively. Written reviews point the same way: 21% of WebSDR's written reviews are positive against 100% of Relic Waves's.
Both ship on a similar rhythm, roughly every 11 months. The most recent releases landed on September 25, 2026 and September 27, 2026 respectively.
| Parameter | WebSDR | Relic Waves |
|---|---|---|
| Price | $5.99 | $1.99 — better |
| Rating | 2.4 (27 ratings) | 5.0 (42 ratings) — better |
| Positive reviews | 20.6% of reviews | 100.0% of reviews — better |
| Number of ratings | 27 | 42 — better |
| Update frequency | Every 11 months | Every 11 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 14.5 | 12.0 — better |
| Further details — not scored | ||
| Size | 20 MB | 6 MB |
| Age rating | 4+ | 4+ |
| Developer | Blue Mangoo Consulting Company Limited | Alexander Zolotov |
Customer experience
WebSDR
Relic Waves
In-app purchases
WebSDR
No in-app purchases
Relic Waves
No in-app purchases









