Retro 15C Rocks!
A dream come true. I Became hooked on this calculator in the 80’s. The original survived many years but finally died a hero’s death after a million million calculations. I’ve been lost since trying to use regular calculators until today.
I’ve been reborn!! Thank you Thank you Thank you. Once you learn RPN you can never go back.🤓ios gearhead
missing the “c” in HP-15c
Overall it works well. However, the “c” in HP-15c stood for continuous memory, and this app doesn’t have that. It doesn’t save state; programming in memory disappears when you quit.None5678
Works great on iPad
Been using HPs since the early 80s. This free app fulfills the need for a handy RPN device. Works great!ARPBSFan
Great!!!!
Love it. It’s perfect. Those that give low ratings are idiots and should not be allowed to have sharp instruments.jimu57
Bug with ->H.MS and ->H conversion
The bug manifests with specific conversions. ->H, errors (wrong value) with Quarter hour conversions <= 3.15. Third of an hour conversions at 0.18, 2.18 and 3.18 ok but 1.18, and >= 4.18 gives wrong values. It appears ->H.MS conversion also generate wrong values for quarter and third hours.I like RPN
I love my 15C
I lost my 15C while working overseas. When I tried to replace it, I was heartbroken to see how my old favorite had become collectible and was going to be very expensive to replace.
I’ve been stumbling around trying to use a normal calculator, pushing buttons in the wrong order! This app is a godsend and will be my go-to calculator from now on.
I hope it keeps update with os changes.joepyeweed
I’ve been waiting for someone to do this
Thank you so much. Lost my 15C somewhere along the way but loved it simple calculation approach. Thx for getting it on the iPhone! Greghibya
Close....but no cigar
A great effort. Truly. But........a few problems. One in particular is terribly annoying.
It does not retain display settings. Every launch....it defaults to four decimal places. You like 7? Or 3? Or 8? Too bad. Next time you open the app....you get four. Merry Christmas.
Also....it would be if it were updated for the larger screens of the iPhone 8’s, XS, and XS Max.Saint Vacuum
Worked on my iPad!
Was excited to discover this works on my iPad despite the iPhone only classification. Thanks to the developer. My real 15C is starting to break down.chyminy
Faithful reproduction
Great application. Faithfully reproduces my favorite calculator. I wish there were a portrait mode though.kolepard
