JRC v1.1.3
APK · 18.6 MB · version code 11 · Android 5.0+ · uploaded Mar 15, 2026
- Signature matches the Google Play version Details
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File information
- Version
- v1.1.3 (11)
- Uploaded
- Mar 15, 2026
- Size
- 18.6 MB
- Requires
- Android 5.0+ (API 21)
- CPU support
- Any (no native code)
- Screen
- Small screens and larger
- MD5
- 857dc8d6bca31c1654ab460cc1a1a237
- Signing certificate (SHA-1)
- 54:42:F6:EF:F0:A3:83:31:55:4A:B2:46:CB:7A:1B:8A:3F:73:C6:A3
- Signed by
- CN=Kuniaki Takahashi, OU=jca, O=jca, L=Chiyoda-ku, ST=Tokyo, C=JP
- File name
- jp-co-convention-jrc2019-11-73947264-857dc8d6bca31c1654ab460cc1a1a237.apk
- Package
- jp.co.convention.jrc2019
- Downloads (all versions)
- 1K+
- Age rating
- PEGI 3 · Everyone
Permissions (19)
This version requests 19 permissions, 3 of them sensitive.
- Find accounts on the device Sensitive android.permission.GET_ACCOUNTS
- Read calendar Sensitive android.permission.READ_CALENDAR
- Write calendar Sensitive android.permission.WRITE_CALENDAR
- Advertising ID com.google.android.gms.permission.AD_ID
- Authenticate accounts android.permission.AUTHENTICATE_ACCOUNTS
- Control vibration android.permission.VIBRATE
- Full network access android.permission.INTERNET
- Get tasks android.permission.GET_TASKS
- Internal broadcast protection (app-defined) jp.co.convention.jrc2019.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
- Manage accounts android.permission.MANAGE_ACCOUNTS
- Prevent the device from sleeping android.permission.WAKE_LOCK
- Push messaging (app-defined) jp.co.convention.jrc2019.permission.C2D_MESSAGE
- Read sync settings android.permission.READ_SYNC_SETTINGS
- Read sync stats android.permission.READ_SYNC_STATS
- Receive push notifications com.google.android.c2dm.permission.RECEIVE
- Show notifications android.permission.POST_NOTIFICATIONS
- Use credentials android.permission.USE_CREDENTIALS
- View network connections android.permission.ACCESS_NETWORK_STATE
- Write sync settings android.permission.WRITE_SYNC_SETTINGS
Security & authenticity
Security rating: Trusted
Signing certificate
- Signature matches the Google Play version Checked by the source store on Mar 15, 2026.
- Certificate issued to “jca” This is the certificate of the Google Play version.
- Same certificate as the other version checked
Store checks
- Developer signature verified Mar 15, 2026
- Validated against Google Play Mar 15, 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 (1 other version compared). AAPKs doesn't scan files itself.
How to install JRC on Android 5.0+
You'll need about 37.2 MB of free space.
- Download the APK — tap Download APK above (18.6 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-convention-jrc2019-11-73947264-857dc8d6bca31c1654ab460cc1a1a237.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 857dc8d6bca31c1654ab460cc1a1a237. 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 JRC — 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 5.0+). Download it again, or pick an older version.
- Blocked by Play Protect — Play Protect checks apps from outside the Play Store. Only continue if you trust the source.