Helical Antenna Calculator
v4.0 · 1.5 MB · code 4
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File information
UpdatedJul 10, 2020
PublishedJul 10, 2020
Packageappinventor.ai_Emosolo.Helical_Calculator
Versionv4.0 (4)
Size1.5 MB
MD59ebabaeb6d2d87cb6661ecf1db8b71d5
Min SDK3
Malware scanTRUSTED
Signature SHA176:71:E2:E3:D3:CE:6F:03:DC:1C:02:77:79:54:9A:CD:0A:50:5B:30
SignerCN=RC King, OU=RC King, O=Software Development, L=Johannesburg, ST=Gauteng, C=ZA
Total downloads1,000
This version1,000
DeveloperJames Roney
Age ratingEveryone
What's new in v4.0
23 April 2014
Version 4
Resolve some layout issues.
Version 4
Resolve some layout issues.
Security scan
TRUSTED
- Developer signature verified 2020-08-06
- Scanned for malware 2021-01-18 00:43:11
- Signature SHA1 76:71:E2:E3:D3:CE:6F:03:DC:1C:02:77:79:54:9A:CD:0A:50:5B:30
- File MD5 9ebabaeb6d2d87cb6661ecf1db8b71d5
How to install Helical Antenna Calculator v4.0 on Android API 3+
Takes about 2 minutes. You'll need roughly 1.5 MB of free storage.
- Grab appinventor.ai_Emosolo.Helical_Calculator_4.apk — hit the Download button above (1.5 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 9ebabaeb6d2d87cb…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find appinventor.ai_Emosolo.Helical_Calculator_4.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=RC King, OU=RC King, O=Software Development, L=Johannesburg, ST=Gauteng, C=ZA. 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 Helical Antenna Calculator — tap Open on the install screen, or find the Helical Antenna Calculator icon in your app drawer.
Common install errors for Helical Antenna Calculator
- "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 3 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.