JRC
v1.1.3 · 18.6 MB · code 11
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File information
UpdatedMar 15, 2026
PublishedApr 13, 2025
Packagejp.co.convention.jrc2019
Versionv1.1.3 (11)
Size18.6 MB
MD5857dc8d6bca31c1654ab460cc1a1a237
Min SDK21
Malware scanTRUSTED
Signature SHA154:42:F6:EF:F0:A3:83:31:55:4A:B2:46:CB:7A:1B:8A:3F:73:C6:A3
SignerCN=Kuniaki Takahashi, OU=jca, O=jca, L=Chiyoda-ku, ST=Tokyo, C=JP
Total downloads1,000
This version1,000
DeveloperJapan Convention Services
Age ratingEveryone
Security scan
TRUSTED
- Developer signature verified 2026-03-15
- Signature SHA1 54:42:F6:EF:F0:A3:83:31:55:4A:B2:46:CB:7A:1B:8A:3F:73:C6:A3
- File MD5 857dc8d6bca31c1654ab460cc1a1a237
How to install JRC v1.1.3 on Android 5.0 Lollipop+
Takes about 2 minutes. You'll need roughly 18.6 MB of free storage.
- Grab jp.co.convention.jrc2019_11.apk — hit the Download button above (18.6 MB). If your browser warns about APK files, choose Keep or Download anyway — that warning fires on every APK, not just this one.
- Trust your browser to install — on Android 8+ go to Settings → Apps → Special access → Install unknown apps, pick the app you downloaded with (Chrome, Firefox, Files, etc.), and flip Allow from this source. On older Android, toggle Unknown sources under Security.
- (Optional) Verify the file — compute the MD5 of the downloaded APK and make sure it matches 857dc8d6bca31c16…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find jp.co.convention.jrc2019_11.apk in your Files app under Downloads, then tap it. Android's package installer will appear.
- Check the signer — the install screen will name the publisher. For this build it should read CN=Kuniaki Takahashi, OU=jca, O=jca, L=Chiyoda-ku, ST=Tokyo, C=JP. If it doesn't match, cancel — you have the wrong file.
- Review permissions & tap Install — scroll the permission list, then confirm. If Play Protect flags it, tap Install anyway (this APK was scanned as TRUSTED).
- Done — open JRC — tap Open on the install screen, or find the JRC icon in your app drawer.
Common install errors for JRC
- "App not installed" — usually means an older or differently-signed version is already on your device. Uninstall it first, then retry. Your data may be lost unless you back it up.
- "Parse error" — the APK is for a newer Android than yours. This version needs Android 5.0 Lollipop or later. Pick an older build from the versions list below.
- "There was a problem parsing the package" — the download was interrupted. Delete the file and re-download over Wi-Fi.