SideBooks - PDF&Comic viewer v2.8.20
APK · 17.6 MB · version code 282001 · Android 4.4+ · uploaded Jul 19, 2026
- Signature matches the Google Play version Details
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Answer this to unlock the download. It keeps automated downloaders away.
Compared with the latest version
The latest version is v2.90.1, uploaded Aug 13, 2026 — about 24 days after this one.
- Size: this file is 17.6 MB; the latest is 19.6 MB (2 MB larger).
- Android: this version needs Android 4.4+; the latest needs Android 5.0+. Use this one if your device runs an older Android release.
- Both versions request the same permissions.
File information
- Version
- v2.8.20 (282001)
- Uploaded
- Jul 19, 2026
- Size
- 17.6 MB
- Requires
- Android 4.4+ (API 19)
- CPU support
- x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
- Screen
- Small screens and larger
- MD5
- ad55ed37cdbaa766484b20855764bbbb
- Signing certificate (SHA-1)
- F9:48:F0:18:94:5C:3B:C0:B9:CC:8B:C2:CF:68:30:4C:E2:A7:46:81
- Signed by
- CN=????, OU=????, O=?????????, L=????, ST=???, C=jp
- File name
- jp-co-tokyo-ip-sidebooks-282001-75717387-ad55ed37cdbaa766484b20855764bbbb.apk
- Package
- jp.co.tokyo_ip.SideBooks
- Downloads (all versions)
- 500K+
- Age rating
- PEGI 3 · Everyone
What's new in v2.8.20
From ver2.8.20, the use of "access all files" permission for the SideBooks app has been prohibited by a notification from Google Play.
As a result, if you change the home folder of your local bookshelf to your own folder, you may experience problems such as a significant decrease in operating speed or the inability to open some files.
If a problem occurs, please use the home folder as the default folder during installation.
Permissions (8)
This version requests 8 permissions, 2 of them sensitive.
- Camera Sensitive android.permission.CAMERA
- Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
- 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) jp.co.tokyo_ip.SideBooks.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
- Prevent the device from sleeping android.permission.WAKE_LOCK
- View network connections android.permission.ACCESS_NETWORK_STATE
Security & authenticity
Security rating: Trusted
Signing certificate
- Signature matches the Google Play version Checked by the source store on Jul 19, 2026.
- Certificate issued to “?????????” This is the certificate of the Google Play version.
- Same certificate as the 5 other versions checked
Store checks
- Developer signature verified Jul 19, 2026
- Validated against Google Play Jul 19, 2026
- Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020
Scans come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (5 other versions compared). AAPKs doesn't scan files itself.
How to install SideBooks - PDF&Comic viewer on Android 4.4+
You'll need about 35.3 MB of free space.
- Download the APK — tap Download APK above (17.6 MB). Chrome shows “File might be harmful” for every APK file; choose Download anyway only if you trust this file.
- Open the file — tap the download notification, or open Files › Downloads and tap jp-co-tokyo-ip-sidebooks-282001-75717387-ad55ed37cdbaa766484b20855764bbbb.apk.
- Allow the install (first time only) — Android 8 and later asks for permission the first time an app opens an APK: tap Settings in the prompt, turn on Allow from this source, then go back. Manual path: Settings › Apps › Special app access › Install unknown apps (on Samsung: Settings › Apps › ⋮ › Special access). On Android 7 and older: Settings › Security › Unknown sources.
- Check the file (optional) — the MD5 of the downloaded file should be ad55ed37cdbaa766484b20855764bbbb. If it differs, the file is damaged or was changed: delete it and download again.
- Tap Install — Android asks “Do you want to install this app?”. If Google Play Protect shows a warning, read it before you continue: the source store rated this file Trusted, but only install apps from sources you trust. If an earlier version is installed, this one only installs as an update when it is signed with the same certificate (SHA-1 shown above).
- Open SideBooks - PDF&Comic viewer — tap Open on the install screen, or find it in your app drawer.
Common install problems
- “App not installed” — a version signed with a different certificate, or a newer version, is already installed (Android doesn't allow downgrades). Uninstall it first; back up your data, because uninstalling deletes it.
- “There was a problem parsing the package” — the file is incomplete, or your Android is too old (this version needs Android 4.4+). Download it again, or pick an older version.
- “App not compatible with your device” — this build contains native code for x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit only. Devices with other processors can't install it.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.