Reviews of Droid48

By: Arnaud Brochard

List of user reviews and ratings for Droid48

Total ratings

4.78 (Rating count: 15,508)

Receive review notifications

Get notified when new reviews are posted so you can respond quickly.

See reviews on Google Play Store

View and respond to reviews directly on the store page.

Visit

Review summary

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

Upgrade to see all 76 reviews

User Reviews

Recent rating average: 4.10

All time rating average: 4.78

Upgrade to see all 76 reviews

4% (3)

Date	Author	Comment
2026-05-14	Al*****	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 :(
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 :(
2026-04-12	Da*****	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 :(
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 :(
2026-04-11	Fe*****	I really like the app, missed my HP48GX
I really like the app, missed my HP48GX
2026-04-03	An*****	it really doesn't like to go into landscape but it works. Even has minesweeper!
it really doesn't like to go into landscape but it works. Even has minesweeper!
2026-03-14	Jo*****	Brilliant calculator takes me back to Varsity days
Brilliant calculator takes me back to Varsity days
2026-03-12	To*****	My parents worked at HP so I grew up with RPN in high school (mid-80s), owning several calculators (LED & LCD). This works great and true but I find it's easier to use on a large screen. I wish the division symbol was a forward slash because the one used looks too similar to the plus sign when I'm not wearing my glasses. Lately the display sometimes twitches and all values are lost. Same when the orientation changes, values are lost and sometimes it just locks-up. Android v.16.
My parents worked at HP so I grew up with RPN in high school (mid-80s), owning several calculators (LED & LCD). This works great and true but I find it's easier to use on a large screen. I wish the division symbol was a forward slash because the one used looks too similar to the plus sign when I'm not wearing my glasses. Lately the display sometimes twitches and all values are lost. Same when the orientation changes, values are lost and sometimes it just locks-up. Android v.16.
2026-02-27	De*****	Droid48 app my on Galaxy s5: Have this Droid48 App installed on my Samsung Galaxy: S5, S7 and now my S21. I've used real HP48GX calculators for over 30 years now... and now it's totally awesome to this powerful App on my Phone.
Droid48 app my on Galaxy s5: Have this Droid48 App installed on my Samsung Galaxy: S5, S7 and now my S21. I've used real HP48GX calculators for over 30 years now... and now it's totally awesome to this powerful App on my Phone.
2026-02-12	Ch*****	This is the best Calculator I have ever used. I even installed it on the computer. Kudos to the Designer! Great job. I only wish that all the arithmetic signs (+, -,*,/) aligned with the computer keyboard.
This is the best Calculator I have ever used. I even installed it on the computer. Kudos to the Designer! Great job. I only wish that all the arithmetic signs (+, -,*,/) aligned with the computer keyboard.
2026-01-23	To*****	Wish you could still buy a real RPN calculator but this works well for an app.
Wish you could still buy a real RPN calculator but this works well for an app.
2026-01-20	'R*****	crashes. doesn't save settings like eng notation and angle units
crashes. doesn't save settings like eng notation and angle units