Programmable RPN Calc
v1.48 · 687.6 KB · code 48
Verify you're human
Solve this to start the download.
File information
UpdatedMay 8, 2022
PublishedMar 22, 2021
Packagecom.ericbt.rpncalcfree
Versionv1.48 (48)
Size687.6 KB
MD52a4766529516dbf0d7b210ccb34c73be
Min SDK24
Malware scanTRUSTED
Signature SHA183:C0:97:E2:9E:68:E6:DB:B7:CA:46:FA:9F:86:86:7E:B7:FB:11:24
SignerCN=Eric Terrell, OU=Software Development, O=Personal MicroCosms, L=Denver, ST=CO, C=US
Total downloads1,000
This version1,000
DeveloperEric Bergman-Terrell
Age ratingEveryone
What's new in v1.48
API 31
Security scan
TRUSTED
- Developer signature verified 2025-10-24
- Scanned for malware 2022-05-08 20:01:41
- Signature SHA1 83:C0:97:E2:9E:68:E6:DB:B7:CA:46:FA:9F:86:86:7E:B7:FB:11:24
- File MD5 2a4766529516dbf0d7b210ccb34c73be
How to install Programmable RPN Calc v1.48 on Android 7.0 Nougat+
Takes about 2 minutes. You'll need roughly 687.6 KB of free storage.
- Grab com.ericbt.rpncalcfree_48.apk — hit the Download button above (687.6 KB). 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 2a4766529516dbf0…. Any difference means the file is corrupted or tampered — delete and re-download.
- Open the APK — tap the download notification, or find com.ericbt.rpncalcfree_48.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=Eric Terrell, OU=Software Development, O=Personal MicroCosms, L=Denver, ST=CO, C=US. 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 Programmable RPN Calc — tap Open on the install screen, or find the Programmable RPN Calc icon in your app drawer.
Common install errors for Programmable RPN Calc
- "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 7.0 Nougat 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.