Ham Clock
v4.04 · 2.5 MB · code 404
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File information
UpdatedNov 23, 2025
PublishedApr 26, 2023
Packagecc.kostic.hamclock
Versionv4.04 (404)
Size2.5 MB
MD541d54a20acf4ce19b0ff05535aab9fe5
Min SDK16
Malware scanTRUSTED
Signature SHA112:C4:CE:26:EB:BE:43:DD:88:CA:8A:63:02:7F:38:4D:49:68:39:51
SignerCN=Zoran Kostic, OU=-, O=Licno, L=Belgrade, ST=Serbia, C=SR
Total downloads10,000
This version10,000
DeveloperZoran
Age ratingEveryone
What's new in v4.04
*4.03*
**Sharing notes: fixed crash on Android 7+ thanks to firebase crash analytics
- Importing notes works best from G Drive or Gmail (don't save attachment)
Due to low standardization, others give different results per device, android version etc. Your mileage _will_ vary
- App imports note as plaintext if JSON format fails
- Types pdf, jpg, gif..silently discarded
*4.02*
- Very important fixes + firebase crash analytics to catch a rare problem (occasionally needs internet perm.)
**Sharing notes: fixed crash on Android 7+ thanks to firebase crash analytics
- Importing notes works best from G Drive or Gmail (don't save attachment)
Due to low standardization, others give different results per device, android version etc. Your mileage _will_ vary
- App imports note as plaintext if JSON format fails
- Types pdf, jpg, gif..silently discarded
*4.02*
- Very important fixes + firebase crash analytics to catch a rare problem (occasionally needs internet perm.)
Security scan
TRUSTED
- Developer signature verified 2025-11-23
- Signature SHA1 12:C4:CE:26:EB:BE:43:DD:88:CA:8A:63:02:7F:38:4D:49:68:39:51
- File MD5 41d54a20acf4ce19b0ff05535aab9fe5
How to install Ham Clock v4.04 on Android API 16+
Takes about 2 minutes. You'll need roughly 2.5 MB of free storage.
- Grab cc.kostic.hamclock_404.apk — hit the Download button above (2.5 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 41d54a20acf4ce19…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find cc.kostic.hamclock_404.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=Zoran Kostic, OU=-, O=Licno, L=Belgrade, ST=Serbia, C=SR. 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 Ham Clock — tap Open on the install screen, or find the Ham Clock icon in your app drawer.
Common install errors for Ham Clock
- "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 API 16 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.