Comparison

NoiseLevel vs Shh

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

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.

Highlights
  • 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
Features
Read full description

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.

About

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.

Highlights
  • Noise level alerts
  • Background operation
  • Lock screen alerts
  • Focus enhancement
  • Stress reduction
Features
Read full description

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

NoiseLevel4 screens
Shh4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Shh is free to download; NoiseLevel costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

NoiseLevel ships an update fortnightly, Shh every 5 days. The most recent releases landed on September 26, 2026 and June 9, 2026 respectively.

Scorecard5 real differences · 5 level
NoiseLevel versus Shh: the parameters behind the verdict, then further details
ParameterNoiseLevelShh
Price$0.99Free — better
Rating2.6 (28 ratings) — better—
Positive reviews56.0% of reviews100.0% of reviews — better
Number of ratings28 — better—
Update frequencyFortnightlyEvery 5 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
DevicesiPhone, iPodiPhone, Apple Watch
Requires iOS10.0 — better17.0
Further details — not scored
Size3 MB2 MB
Age rating+44+
DeveloperKBMSoft ApSJia Jang

Customer experience

NoiseLevel

All ratings28 ratings
Positive32.1%
Neutral10.7%
Negative57.1%
Written reviews25 reviews
Positive56.0%
Neutral20.0%
Negative24.0%

Shh

Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

NoiseLevel

No in-app purchases

None

Shh

No in-app purchases

Questions

Is NoiseLevel free?
NoiseLevel costs $0.99, with no in-app purchases.
Is Shh free?
Shh is free to download, with no in-app purchases.
Do NoiseLevel or Shh have ads?
Neither NoiseLevel nor Shh shows ads.
Which is updated more often, NoiseLevel or Shh?
NoiseLevel ships an update fortnightly, and Shh every 5 days. Most recently, NoiseLevel was updated on September 26, 2026 and Shh on June 9, 2026.

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