The best of the best RPNs - the original - the masterpiece to rule them all. :)
Looks and acts like the real thing... I love having it in my pocket wherever I am, rather than having to go get the real one from my desk when I need it. The simplified vertical layout is a nice plus for simple tasks.
Great app with only one fault: If it had a full portrait mode it would be perfect.
Works great. Brings back memories of college.
It was great until I got a new phone last week. Pixel 6. Screen opens ok but can't see numbers after pressing.
Simply wonderful
Like so many others, my hp15 and hp16 were my bread & butter calculators. I have always tried to understand the ins and outs of how to fully use them - especially with something as complex as the later hp calculators. I noticed the app works at the speed of the processor and not the programmer! (Don't you just HATE those sluggish, buggy apps!) It feels snappy and responsive. For the price of lunch for 2 at fast food, the app IS WORTH every penny. It truly replicates the genuine thing.
Loved it. I have the real 15C and it is great to have it in app version in your phone. The original instruction manual is included so that was a bonus surprise. I hope they make a 16C version too.
Great HP-15C for phone & tablet
My HP 15C Scientific Calculator quit working after my phone was updated.