King Sound vs RidgeRelay
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
King Sound
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KingSound motion sensor speaker adopts mature pyroelectric human body induction technology, built-in Wi-Fi module, and uses mobile APP to operate. It can choose to play different voice content according to different places and different time periods, easy to install and easy to operate. Widely used in Government, exhibition halls, supermarkets, stations, airports and other places. Features * Motion sensor can be accurately recognized when a person passes by, and play sound. * Support external trigger control, timing play, interval time play. * MP3 audio format playback, beautiful sound quality. * Support Wi-Fi connection, use the mobile APP to set the timing, easy to operate. * 1 ~ 50 sets of timing data can be set. * Voice update is convenient, you can automatically update the voice files by U disk. * Built-in flash memory, the duration of voice playback can be customized according to customer needs. * Can set the loop playback function. * With clock display function, the current time will be automatically updated after connecting the phone.
RidgeRelay
Control up to six relay outputs directly from your iPhone. Personalize relay names, icons, and colors. Monitor live hardware status via Bluetooth connection.
- Control six relay outputs
- Customize relay names
- Personalize icons and colors
- View live hardware status
- Bluetooth connectivity
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RidgeRelay lets you control six relay outputs from your iPhone. Customize relay names, icons, and colors while viewing live hardware-reported status over Bluetooth.
Screenshots
Verdict
The clearest difference is update cadence: RidgeRelay at every 3 months against King Sound's every 22 months. King Sound's advantage is iOS requirement (9.0 vs 17.0). On price, ads, 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.
King Sound ships an update every 22 months, RidgeRelay every 3 months. The most recent releases landed on November 2, 2026 and November 3, 2026 respectively.
| Parameter | King Sound | RidgeRelay |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 22 months | Every 3 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 9.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 19 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Waytronic Electronics Company Limited | SWITCHED KINETIC IDEAS LLC |
In-app purchases
King Sound
No in-app purchases
RidgeRelay
No in-app purchases
