At a glance
- Latest version
- v1.0.1 (1)
- Updated
- Oct 29, 2024 (1 year ago)
- APK size
- 3 MB
- Requires
- Android 2.3+ (API 9)
- CPU support
- Any (no native code)
- Category
- Books & Reference (app)
- Listed since
- Sep 11, 2019 (at least)
- Permissions
- 4 (1 sensitive)
About this APK
Signals and Systems is an app by Pham Thuy in the Books & Reference category, listed since at least September 2019. It has no native code, so it runs on any Android processor.
It asks for 4 permissions, 1 of them sensitive: modify shared storage.
Description
From the listing uploaded by “catappult”.
Security & authenticity
Signing certificate
- Certificate issued to “OpLai” Not the developer's name (“Pham Thuy”). Names in certificates can't be verified, so this alone proves nothing.
Store checks and file details
- Developer signature not checked yet Oct 20, 2015
- Antivirus scan passed Oct 7, 2020
- Signed byCN=Nguyen Thai Hoang, OU=OpLai, O=OpLai, L=Hanoi, ST=Hanoi, C=84
- Signing certificate (SHA-1)B2:1A:27:E9:30:2B:62:2E:3E:02:19:C9:A4:B2:99:A7:CE:5E:56:D8
- File MD5269b636a93af65ecf6a3c616b76157b8
- Uploaded by “catappult” Platinum tier · 1,377 followers · uploading since 2018
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 (4)
Signals and Systems requests 4 permissions, 1 of them sensitive.
- Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
- Full network access android.permission.INTERNET
- View Wi-Fi connections android.permission.ACCESS_WIFI_STATE
- View network connections android.permission.ACCESS_NETWORK_STATE
Required hardware & features
- Portrait screen android.hardware.screen.portrait
- Touchscreen android.hardware.touchscreen
- Wi-Fi android.hardware.wifi
Signals and Systems APK: questions and answers
Can I install this APK over the version I already have?
Only if it is signed with the same certificate as the copy on your phone and isn't an older version. If Android says “App not installed”, the certificates differ; uninstalling your copy first works but deletes its data unless it is backed up.
Is the Signals and Systems APK safe?
No one can promise that a file is safe, but some things can be checked. The source store rates this file Unknown. After downloading, check that the file's MD5 is 269b636a93af65ecf6a3c616b76157b8.
