Droid48

Name: Droid48
Rating: 4.78 (15508 reviews)
Author: Arnaud Brochard

By: Arnaud Brochard

HP 48 lives again on Android!

Features & Capabilities

Droid48 brings the classic HP 48 scientific calculator experience to your Android device through a reliable emulator based on the X48 project. Using Reverse Polish Notation (RPN), it faithfully replicates the calculator's core functions, though HP48's grayscale mode is not emulated. Users can explore a large collection of programs at www.hpcalc.org directly complementing the emulator's capabilities. A handy feature allows toggling a simpler numeric pad by tapping the HP's LCD, optimizing ease of use on mobile screens.

Ideal for enthusiasts, engineers, students, or anyone familiar with the HP 48, Droid48 ensures portability of this powerful tool on modern devices. Being open source, with code available on GitHub, it welcomes developer contributions and transparency.

User Growth & Download Statistics

App Education

By:

Downloads:

Rating:

Version:

1.78 Last updated: 2024-08-24

Version code:

Publisher country:

Permissions:

android.permission.READ_EXTERNAL_STORAGE High risk
android.permission.WRITE_EXTERNAL_STORAGE High risk

Size:

1.41MB

Email:

sh*****@gmail.com

URLs:

Website ,Privacy policy

Full description:

Source:

Google Play Store

Data ingested on:

2026-06-11

Compare stats and ranking:

Ranking

# 51,798 ▲ 518

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:

Arnaud Brochard

Google Play Store

https://play.google.com/store/apps/details?id=org.ab.x48

Email:

sh*****@gmail.com

Website:

http://twitter.com/shagr4th

User Reviews

Overall, Droid48 is praised as a faithful HP 48 / RPN emulator that many users rely on for nostalgia and real world use. It is described as fast, reliable, with large buttons and no ads. However, users frequently report stability problems including crashes on various devices and after updates, data loss on screen rotation, and memory or settings not saving properly. Some UI glitches and inconsistent device behavior add to the concerns. Despite these issues, fans want continued support, cross platform availability, and widget improvements.

Pros

Faithful HP 48 / HP RPN emulator with accurate functionality and feel
Nostalgia and strong praise; described as the best calculator and a faithful recreation
No adverts and no bloat; clean and focused emulator
Large, easy to use buttons and fast performance
Reliable for field use and long term use across devices; loved by long time HP fans

Cons

Crashes and instability across devices and after updates
Data loss on device rotation or orientation changes
Memory and settings not saving reliably (memory stack, eng notation, angle units)
UI glitches such as DEL button not clearing the stack and flaky 3 dots menu
Device specific issues and inconsistent behavior across models

Recent reviews

My brain functions in Stack format and RPN, so I have to have this. Some caveats. When auto-switching from portrait to landscape / vice versa, the stack clears. Task switching and going to and from other apps sometimes causes Droid48 to hang, requiring a restart. Otherwise, this is a fantastic app that is a pretty accurate facsimile of the real HP48. I use it for unit conversions ALL the time. I now use this instead of my real HP48GX because its screen became hard to see :(

Al*****, 2026-05-14

This is the best post-fix calculator, made into an excellent app and in the top 10 most important apps on my phone!. As easy to use as the real thing. Where is the donate button? Seriously, where?

A *****, 2026-05-12

It was great, until it was not :( It stopped running on my S20FE :( Yes, I've tried reinstalling it, with no luck. Msg says app has a bug and need to be upgraded after author fixes it :(