VoiceArrest vs Sylvius Generic
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
VoiceArrest
Control your sound masking system with this app. Independently adjust the volume of masking sounds and music across different zones. Enhance your speech privacy.
- Control sound masking system
- Adjust masking sound volume
- Adjust music volume
- Independent zone control
- Speech privacy enhancement
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The VoiceArrest Volume Control app allows controlling your Speech Privacy Systems VoiceArrest sound masking system. Adjust the masking sound and music volume of each zone independently.
Sylvius Generic
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Sylvatest 4 is the 4th generation of the key reference device SYLVATEST designed to estimate wood quality assessment from the standing trees to the structural components. Sylvatest 4 measures the time of flight of ultrasonic waves in the wood between two transducers: the emitter and the receiver. Additionally, the peak of energy of the transmitted waves is recorded (mV). A measurement takes no longer than several seconds. The Sylvius software has been specifically developed to analyze Sylvatest data and allows an immediate diagnostic of the measured wood.
Screenshots
Verdict
The clearest difference is update cadence: Sylvius Generic at every 2 months against VoiceArrest's every 24 months. Sylvius Generic also leads on iOS requirement (8.0 vs 15.6). 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.
VoiceArrest ships an update every 24 months, Sylvius Generic every 2 months. The most recent releases landed on June 25, 2026 and September 9, 2026 respectively.
| Parameter | VoiceArrest | Sylvius Generic |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 24 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 8.0 — better |
| Further details — not scored | ||
| Size | 1 MB | 76 MB |
| Age rating | 4+ | 4+ |
| Developer | Soft dB, inc. | C.B.T Concept Bois Technologies SA |
In-app purchases
VoiceArrest
No in-app purchases
Sylvius Generic
No in-app purchases
