48sx, a vintage RPN calculator

Name: 48sx, a vintage RPN calculator
Rating: 4.62 (1398 reviews)
Author: czodroid

By: czodroid

48sx is an emulator of the HP48sx, a vintage RPN calculator.

Features & Capabilities

48sx: The HP48 SX Emulator

48sx is a faithful emulator of the vintage HP48sx RPN calculator, allowing you to carry this classic tool in your pocket on Android devices. Originally beloved by users decades ago, the HP48 SX is now accessible through this free, ad-free app that provides all its traditional features.

The emulator supports Android versions 4.4 to 14 across multiple CPU architectures, offering bug fixes, performance improvements, and optimized interaction such as haptic feedback and improved screen resolutions. It includes convenient features like save/restore checkpoints and file handling with proper permissions on newer Android versions. 48sx is open-source with full source code and APK releases available on GitHub, making it ideal for lovers of vintage calculators and RPN enthusiasts seeking nostalgia and practical use alike.

Main Features:

Emulation of the HP48sx RPN calculator vintage experience
Completely free with no ads or nags
Supports Android 4.4 to 14 and various processors
Includes save and restore checkpoint functionality
Open source with available APK and Play Store downloads
Modern UI improvements including haptic feedback and full pixel resolution LCD

Rediscover the classic HP48 SX experience with 48sx anytime, anywhere on your Android device!

User Growth & Download Statistics

App Education Programming

By:

Downloads:

Rating:

Version:

15.2 Last updated: 2025-06-01

Version code:

29146660

Creation date:

2012-11-07

Publisher country:

Permissions:

android.permission.READ_MEDIA_IMAGES High risk
android.permission.READ_MEDIA_VISUAL_USER_SELECTED Moderate risk

Size:

1.65MB

Email:

cz*****@gmail.com

URLs:

Website ,Privacy policy

Full description:

Source:

Google Play Store

Data ingested on:

2026-06-11

Compare stats and ranking:

Ranking

# 180,719 ▲ 1,533

For Developers

Monetize with App Pass Boost with Extension Booster

Contact the developer

Chrome-Stats does not own this Android app. Please use these information below to contact the Android app developer.

Developed by:

czodroid

Google Play Store

https://play.google.com/store/apps/details?id=org.czo.droid48sx

Email:

cz*****@gmail.com

Website:

https://github.com/czodroid

User Reviews

Users praise 48sx for faithful HP48 emulation and reliable performance, making it a top choice for engineering work. The main recurring downside is unreliable save-on-exit state, plus occasional device-specific quirks. Overall, it’s viewed as a premier Android HP/RPN emulator with ongoing improvements likely addressing the save-state issue.

Pros

Extremely faithful HP48/HP48SX emulation; users describe it as just like the real device and among the most authentic HP48 emulators on Android.
Regarded as one of the best HP48/RPN emulators on Android; repeatedly praised for accuracy and solid performance by engineers and long-time users.
Strong professional-use value; seen as a go-to calculator for engineering and technical work; widely trusted for daily use.
Well-designed UI with tactile feel (graphics fidelity, haptic feedback) that enhances the RPN experience, with a clean interface and minimal setup.

Cons

Save-on-exit state does not reliably persist memory or stack; exiting (or background-killed) can lose data, a concern raised by multiple users and awaiting fix.

Recent reviews

perfect... my old calculator still looks like this

*****, 2026-05-20

These hp rpn calculators are the best calculators on the planet ( in my opinion). So good to see an app simulating one. I still use my hp50g daily at work. now I have one where ever I go! Thank you so much for making this app!