NoiseLevel vs Shh
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
NoiseLevel
Measure ambient sound levels in decibels using your device's microphone. Visualize sound intensity with a dynamic balloon that changes size and color, bursting at high levels. Experiment with different sounds and environments for fun and insight.
- Measures sound in decibels (dB)
- Visualizes sound with a dynamic balloon
- Balloon size and color change with sound level
- Balloon bursts at high sound levels
- Uses device microphone
- Screen orientation flips
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NoiseLevel is a fun way to measure the sounds in your surroundings. Measure the sound level of the music you listen to, your kids playing or your office environment. NoiseLevel uses your iPhone's built-in microphone to first pick up sound and then displays it in dB (= decibels) on a status bar at the bottom of NoiseLevel's main screen. Sounds are also displayed visually as a balloon whose size and color change according to the level of the sound measured. See the balloon burst at high sound levels - you can also make it burst by creating a sharp, high sound, for an example by clapping your hands. Have fun experimenting! For best results, turn the iPhone so the microphone is pointing directly at the sound source. The screen flips accordingly. Disclaimer: NoiseLevel is fairly accurate but it should NOT be considered a professional sound level meter. The built-in microphone of the iPhone can only measure values between 35 to 110 dB and values may vary slightly between iPhones.
Shh
This app helps you stay focused by alerting you when your noise levels exceed a set limit. It's designed for quiet environments like study areas, reducing stress about making noise. Receive discreet alerts even when the screen is locked or the app is in the background.
- Noise level alerts
- Background operation
- Lock screen alerts
- Focus enhancement
- Stress reduction
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When You Worry About Your Noise, Shh-! A noise alert app that helps you stay focused. [ No More Noise Worries With Earphones, Calls, or Work ] An app made for quiet places like study areas, helping you feel less stressed about noise. Get alerts about your sound and stay focused without worrying about what others think! ■ Simple Smart Alerts When your noise goes over the set limit, the app quietly alerts you without breaking your focus. It works on the lock screen and in the background, so you’ll only get alerts when needed. ▶ Who Should Use Shh-!? People unsure about using earphones in study cafes Anyone who has been told to lower their noise in libraries or quiet places Families who want less noise at home Roommates who want a quieter living space ▶ What Shh-! Users Say “It’s great because it doesn’t bother me while studying.” “I feel safe knowing it alerts me if my noise gets too loud.” “I worry less about making noise when I wear earphones now.”
Screenshots
Verdict
The clearest difference is price: Shh at Free against NoiseLevel's $0.99. Shh also leads on review sentiment (100% vs 56%) and update cadence (every 5 days vs fortnightly). NoiseLevel's advantage is iOS requirement (10.0 vs 17.0). On 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
Shh is free to download; NoiseLevel costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
NoiseLevel ships an update fortnightly, Shh every 5 days. The most recent releases landed on September 26, 2026 and June 9, 2026 respectively.
| Parameter | NoiseLevel | Shh |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 2.6 (28 ratings) — better | — |
| Positive reviews | 56.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 28 — better | — |
| Update frequency | Fortnightly | Every 5 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Free — better |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Requires iOS | 10.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 3 MB | 2 MB |
| Age rating | +4 | 4+ |
| Developer | KBMSoft ApS | Jia Jang |
Customer experience
NoiseLevel
Shh
In-app purchases
NoiseLevel
No in-app purchases
Shh
No in-app purchases









