Comparison

SmarterNoise vs Plain|騒音を検知して環境音を自動再生

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

Head to head
About

SmarterNoise

This app measures sound levels, records audio and video, and provides information on noise exposure risks. It features smart icons to help users understand the impact of noise on health and cognitive performance. Save, share, and archive your recordings with this comprehensive tool.

Highlights
  • Sound level measurement
  • Video and audio recording
  • Noise exposure risk information
  • Smart icons for health impact
  • Archive and sharing of recordings
  • Calibration
  • Location and time display
Features
Read full description

SmarterNoise measures sound level, records video and audio and informs about noise SmarterNoise is a premium sound level meter app featuring several unique functions. SmarterNoise measures sound levels in video and audio modes, records video and sound, and informs you about the risks of noise exposure. In addition, SmarterNoise includes a camera, measurement location, and easy sharing, all for free. From the archive you can view the video and audio files you've saved on your phone. With SmarterNoise you take sound level and noise measuring to a new level never available before. SmarterNoise features smart icons that react to the measured sound levels based on current research results focusing on the health and the adverse effects of noise pollution. With the SmarterNoise icons you easily understand how hearing, cognitive performance, and health may be affected by different levels of noise exposure. The awareness of harmful noise is increasing globally, and is considered a versatile risk factor for well-being and health, especially in noise polluted urban environments. Features of SmarterNoise: Sound level measurement and recording in video and audio modes Sound level activated audio recording Full HD, HD or VGA video resolution Three video quality settings Zoom and camera light Restarting of measurement Archive for saved files Sharing of saved files Calibration Smart icons Location, address Time and date display 10 second sound level average (LAeq, decibel) 60 second sound level average (LAeq, decibel) Max and min decibel level About decibels and sound measurement The unit for measuring noise and sound is called a decibel. Because the decibel scale is logarithmic, a sound with an intensity that is twice that of a reference sound corresponds to an increase of about 3 decibels. The reference point of 0 decibel is set at the intensity of the least perceptible sound, the threshold of hearing. On such a scale a 10-decibel sound is 10 times the intensity of the reference sound. Highlighting this is important as already a difference of a few decibels makes a noticeable difference in how noise is perceived. Leq is an average value describing the total sound energy over a period of time. It is however common practice to measure sound levels using A-weighting, which attenuates low and high frequencies that the average person cannot hear. In this case Leq is written LAeq. LAeq is a formulated average which emphasizes higher sound peaks, and is one of the most common measurements used by professionals to measure noise. All averages in SmarterNoise are measured in LAeq. Health effects of noise are often measured in Lden. Lden measures the average sound level over a 24 hour period, with a penalty of 5 dB added for the evening hours between 19:00 and 22:00, and a penalty of 10 dB added for the nighttime hours between 22:00 and 07:00. Increased health risks have been observed during long term exposure, which highlights the need to consider the full average sound energy over a longer period, not only temporary averages or noise peaks. About noise According to the findings of the World Health Organization (WHO), noise is the second largest environmental cause of health problems, after the impact of air quality. While environmental awareness in general has increased, the burden of noise has not yet been realized by the general public. People especially in urban environments are subjected to noise daily and nightly, at home and at work. Noise pollution has increased over the years due to increased traffic and air travel, urbanization, and industrial noise exposure. Because of the complex and frequent issue of everyday noise, we developed SmarterNoise in order for people to understand noise better.

About

Plain|騒音を検知して環境音を自動再生

Features
Read full description

Plain は、周囲の音量を検知し、一定以上うるさくなったときだけ環境音を再生するアプリです。 乾燥機音や換気扇音のようなシンプルな音で、気になる生活音をやわらげ、作業や勉強に集中しやすい環境づくりをサポートします。 主な機能 ・騒音を検知して自動再生 ・DRY / VENT の2種類の音を選択可能 ・感度を3段階で調整可能 ・必要なときは手動再生にも対応 ・黒ベースの静かなミニマルUI Plain は必要なときだけ音で環境を整え、集中しやすい空気をつくることを目指しています。

Screenshots

SmarterNoise4 screens
Plain|騒音を検知して環境音を自動再生4 screens

Verdict

The call

The clearest difference is in-app purchases: Plain|騒音を検知して環境音を自動再生 at none against SmarterNoise's 2. Plain|騒音を検知して環境音を自動再生 also leads on ads (none vs shown) and update cadence (weekly vs every 6 weeks). SmarterNoise's advantage is iOS requirement (12.0 vs 26.2). On price 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

Both are free to download. SmarterNoise sells 2 one-off in-app purchases. Plain|騒音を検知して環境音を自動再生 asks for nothing beyond the download.

UpkeepUpdate frequency

SmarterNoise ships an update every 6 weeks, Plain|騒音を検知して環境音を自動再生 weekly. The most recent releases landed on August 11, 2026 and September 10, 2026 respectively.

Scorecard4 real differences · 6 level
SmarterNoise versus Plain|騒音を検知して環境音を自動再生: the parameters behind the verdict, then further details
ParameterSmarterNoisePlain|騒音を検知して環境音を自動再生
PriceFreeFree
Rating4.6 (115 ratings) — better—
Positive reviews75.0% of reviews—
Number of ratings115 — better—
Update frequencyEvery 6 weeksWeekly — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPod — betteriPhone
Requires iOS12.0 — better26.2
Further details — not scored
Size27 MB12 MB
Age rating12+4+
DeveloperJohan RogardKIICHI STUDIO

In-app purchases

2 purchases

SmarterNoise

One-time2
  • Long-term measurement$1.99
  • Remove ads$2.99
None

Plain|騒音を検知して環境音を自動再生

No in-app purchases

Questions

Is SmarterNoise free?
SmarterNoise is free to download, with in-app purchases available.
Is Plain|騒音を検知して環境音を自動再生 free?
Plain|騒音を検知して環境音を自動再生 is free to download, with no in-app purchases.
Do SmarterNoise or Plain|騒音を検知して環境音を自動再生 have ads?
SmarterNoise shows ads; Plain|騒音を検知して環境音を自動再生 does not.
Which is updated more often, SmarterNoise or Plain|騒音を検知して環境音を自動再生?
SmarterNoise ships an update every 6 weeks, and Plain|騒音を検知して環境音を自動再生 weekly. Most recently, SmarterNoise was updated on August 11, 2026 and Plain|騒音を検知して環境音を自動再生 on September 10, 2026.

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