Concentration!!

The app helps sleep well or concentrate on something. 100k users verified. :)

돼지왕왕돼지 · com.cklee.whitenoise

Not rated yet 100K+ downloads v1.1.8 22.1 MB Android 7.0+ PEGI 3 · Everyone

Download APK 22.1 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v1.1.8 (21)
Updated: Sep 17, 2026 (22 days ago)
APK size: 22.1 MB
Requires: Android 7.0+ (API 24)
CPU support: Any (no native code)
Category: Lifestyle (app)
Listed since: Dec 12, 2025 (at least)
Permissions: 12 (1 sensitive)
Website: aroundck.tistory.com
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

Concentration!! is an app by 돼지왕왕돼지 in the Lifestyle category, listed since at least December 2025. It has no native code, so it runs on any Android processor.

It asks for 12 permissions, 1 of them sensitive: read phone status and identity. The app can read the advertising ID that ad and analytics services use.

What's new in v1.1.8

- App starts to support the latest os version.

Description

From the listing uploaded by “appupdater”.

* "Device ID and Call Information" permission is necessary for turning off noise when incoming call is received. There are times when the space around you is just too loud and you need some kind of a white noise to mask all those distracting sounds, which may come from your noisy neighbors while you are trying to sleep, or from loud colleagues when you are trying to focus on your job, or from a TV in the next room while you are trying to study. White noise is a noise in which all sound frequencies audible to human ear are in equal intensity (desibels). Due to the fact that human ear is made in a such way that it is more sensitive to sound frequencies between 2-5kHz white noise does not sound very pleasant to most of the people if played loudly. Therefore many listeners prefer pink noise or brown noise. These noises have more powerful bass frequencies and less powerful higher frequencies (brown noise has even more powerful bass than pink). Sometimes people by words \"white noise\" mean any kind of noise which can mask other unwanted sounds. The role of such "white noise" may play a sound of a hair dryer, sound of rain, sound of waterfall etc. In one sentence, noises such as pink noise covers unwanted noises so it helps us to sleep well or concentrate on something. This app has following functions. It provides table clock function. It provides keep-screen-on function. It provides app shut-off timer function. Table clock and keep-screen-on function is good for checking time frequently while concentrating on something. App shut-off timer function is good when you use white noise for good sleeping. Now it's time to use "Noise" for better sleeping and better concentration!!

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Sep 17, 2026.
Certificate issued to “KingPig” This is the certificate of the Google Play version.

Store checks and file details

Developer signature verified Sep 17, 2026
Validated against Google Play Sep 17, 2026
Signed byCN=KingPig
Signing certificate (SHA-1)1F:98:72:09:30:B2:28:9B:0B:80:E7:18:25:73:CB:94:60:C3:26:2A
File MD544fef4c3a7ff87469959c49d5574885b
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures. AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (12)

Concentration!! requests 12 permissions, 1 of them sensitive.

Read phone status and identity Sensitive android.permission.READ_PHONE_STATE
Access adservices ad id android.permission.ACCESS_ADSERVICES_AD_ID
Access adservices attribution android.permission.ACCESS_ADSERVICES_ATTRIBUTION
Access adservices topics android.permission.ACCESS_ADSERVICES_TOPICS
Advertising ID com.google.android.gms.permission.AD_ID
Full network access android.permission.INTERNET
Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
Internal broadcast protection (app-defined) com.cklee.whitenoise.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Prevent the device from sleeping android.permission.WAKE_LOCK
Run foreground services android.permission.FOREGROUND_SERVICE
Show notifications android.permission.POST_NOTIFICATIONS
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Basic touch input android.hardware.faketouch
Portrait screen android.hardware.screen.portrait

Concentration!! APK: questions and answers

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the Concentration!! APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. After downloading, check that the file's MD5 is 44fef4c3a7ff87469959c49d5574885b.