Envelope Punch Board Calc'tor
v1.5 · 2.2 MB · code 15
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File information
UpdatedJun 4, 2024
PublishedApr 17, 2021
Packagede.steinborn_online.apps.envelopepunchboard
Versionv1.5 (15)
Size2.2 MB
MD5c75dd9948b6a776a5a3ac25c5271201f
Min SDK16
Malware scanTRUSTED
Signature SHA13E:F7:7F:D1:CA:81:F0:A8:A9:0A:6D:81:70:CB:64:BD:4C:33:02:35
SignerCN=Stefan Steinborn, OU=Development, O=app@steinborn, L=Lenglern, ST=Lower Saxony, C=DE
Total downloads10,000
This version10,000
DeveloperStefan Steinborn
Age ratingEveryone
What's new in v1.5
Nothing new, only changes for Google/Playstore requirements.
Security scan
TRUSTED
- Developer signature verified 2024-06-04
- Signature SHA1 3E:F7:7F:D1:CA:81:F0:A8:A9:0A:6D:81:70:CB:64:BD:4C:33:02:35
- File MD5 c75dd9948b6a776a5a3ac25c5271201f
How to install Envelope Punch Board Calc'tor v1.5 on Android API 16+
Takes about 2 minutes. You'll need roughly 2.2 MB of free storage.
- Grab de.steinborn_online.apps.envelopepunchboard_15.apk — hit the Download button above (2.2 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 c75dd9948b6a776a…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find de.steinborn_online.apps.envelopepunchboard_15.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=Stefan Steinborn, OU=Development, O=app@steinborn, L=Lenglern, ST=Lower Saxony, C=DE. 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 Envelope Punch Board Calc'tor — tap Open on the install screen, or find the Envelope Punch Board Calc'tor icon in your app drawer.
Common install errors for Envelope Punch Board Calc'tor
- "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.