SignalClock vs NoiseLog
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SignalClock
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Digital clock has time signal function based on Local Notification Center. 5 different signal sound sets (Digital Clock, Cuckoo, Voice, Whittington Chime,Church Bell). All fonts iOS 10 supports are available in clock. 5 tone type are available in all sound file sets.
NoiseLog
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NoiseLog turns your iPhone into a precise sound level meter. Whether you're checking your baby's sleep environment, documenting noisy neighbours, monitoring your workplace, or simply curious about the world around you — NoiseLog gives you clear, real-time decibel readings and keeps a full history of every session. MEASURE • Live dB SPL reading with colour-coded noise level indicator • Min, average, and max levels per session • Visual bar meter that reacts in real time RECORD & REVIEW • Start and stop recording sessions with one tap • Full session history with date, duration, and average dB • Session detail view with an interactive chart EXPORT • Export any session as PDF or CSV — great for landlord disputes, workplace complaints, or personal records Simple. Fast. No account required. All data stays on your device.
Screenshots
Verdict
The clearest difference is price: NoiseLog at Free against SignalClock's $0.99. NoiseLog also leads on update cadence (every 3 weeks vs every 5 months). SignalClock's advantage is ads (none vs shown) and device support (3 vs 1). On 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
NoiseLog is free to download; SignalClock costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
SignalClock ships an update every 5 months, NoiseLog every 3 weeks. The most recent releases landed on September 27, 2026 and October 2, 2026 respectively.
| Parameter | SignalClock | NoiseLog |
|---|---|---|
| Price | $0.99 | Free — better |
| Update frequency | Every 5 months | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone |
| Requires iOS | 12.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 103 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Masafumi Endoh | Kai Hoeher |
In-app purchases
SignalClock
No in-app purchases
NoiseLog
No in-app purchases
