Stretch1.2.3

This application describes the way of the stretch.

JK-SCIENCE CO., LTD. · com.stretch123

5.0 out of 5 (1 rating) 100K+ downloads v2.4 14.3 MB Android 8.1+ PEGI 3 · Everyone

Download APK 14.3 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v2.4 (14)
Updated: Sep 2, 2026 (1 month ago)
APK size: 14.3 MB
Requires: Android 8.1+ (API 27)
CPU support: Any (no native code)
Category: Health & Fitness (app)
Listed since: Feb 23, 2021 (at least)
Permissions: 11
Website: stretch123.net
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

Stretch1.2.3 is an app by JK-SCIENCE CO., LTD. in the Health & Fitness category, listed since at least February 2021. It has no native code, so it runs on any Android processor.

Since version 2.1, the APK grew from 8 MB to 14.3 MB and the minimum Android version rose from 8.0 to 8.1. It asks for 11 permissions, none of them sensitive. It asks for the same permissions as version 2.3. The app can read the advertising ID that ad and analytics services use.

What's new in v2.4

Bug fix.

Description

From the listing uploaded by “appupdater”.

This application describes the way of the stretch. Basically stretching is developed to prevent sport-related injury but it is effective to alleviate headache,astriction,excessive sensitivity to cold,hangover,swelling,stress in daily life. These symptoms are caused by mental stress or stiff muscles. Working in the same position causes muscles stiff and bad blood circulation and it leads to these symptoms. Stretching excircise stimulates muscles and tendons by streching. It increases metabolism and facilitates the flow of blood to treat tired muscles. Please use our application for maintenance and improvement of health and prevention of injury.

Version history

4 versions are listed, going back to v2.1. Since v2.2 it requires Android 8.1+.

v2.4 LATEST Sep 2, 2026 14.3 MB TRUSTED v2.3 Mar 17, 2026 14.2 MB TRUSTED v2.2 Sep 5, 2024 9.1 MB TRUSTED v2.1 Jun 13, 2024 8 MB TRUSTED

All 4 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Sep 2, 2026.
Certificate issued to “JK-SCIENCE” This is the certificate of the Google Play version.
Same certificate as the 3 other versions checked

Store checks and file details

Developer signature verified Sep 2, 2026
Validated against Google Play Sep 2, 2026
Signed byO=JK-SCIENCE, ST=Tokyo, C=JP
Signing certificate (SHA-1)39:34:BD:F0:A3:1B:A7:DF:60:5C:F6:BB:9B:7F:15:2A:1D:77:1B:22
File MD5506948b029235cad13d286faaf9d3fd1
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 (3 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (11)

Stretch1.2.3 requests 11 permissions, none of them sensitive.

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
Control vibration android.permission.VIBRATE
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.stretch123.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Prevent the device from sleeping android.permission.WAKE_LOCK
Run foreground services android.permission.FOREGROUND_SERVICE
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

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

Stretch1.2.3 APK: questions and answers

Is there a version of Stretch1.2.3 for older Android phones?

The current version needs Android 8.1 or later. Version 2.1 is the newest listed build that installs on Android 8.0 and later. It is an old build: apps that rely on online services may no longer connect when they are this old. Get version 2.1 · All versions

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 Stretch1.2.3 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. It is signed with the same certificate as the 3 other versions checked. After downloading, check that the file's MD5 is 506948b029235cad13d286faaf9d3fd1.