HP 15C Calculator 4+

Great reproduction of the classic! Works great in the iPhone 6. I'm an electrical engineer who still depends on my 15c. Main complaint is the very loud clicks for the buttons which is very annoying, especially since there is no way to disable or lower its volume from within the ap. Turning off the ringer on the side of the iPhone to disable sound works but is unacceptable. Hopefully HP will fix this soon - especially if enough of us complain. However, the calculating capabilities work exactly as the original.

We need an iOS compatible upgrades from HP soon!!

I've used HP calculators most of my life, since my first HP67 in 1980. I still have it. I have many others: 34C, 11C, 12C, 15C, 41CV, 48GX. No other calculator type, has ever surpassed the HP family. EVER. I prefer to use the real ones only occasionally now, because there are no more replacement parts.

However, The emulators for the iPhone are so nice to have and I use them regularly, and they're all in my pocket on the iPhone 6s+. Phone size is about the actual size of the real machines too. I love em.

HP needs to update the 12 and 15 soon though. Apple says they are not compatible with future versions of iOS. Other developers are keeping up with their HP emulators, some of which are very nice.

I think HP would have a profitable business unit if they took seriously bringing these great little computing machines back to life in the whole family of reasonably priced emulators.

However, for now, is be grateful if they would just ensure their existing emulators are compatible with future iOS versions.

Kindest Regards,

This is a superb emulation of the original Hewlett-Packard HP 15C calculator. I should know. I had an HP 15C when it was new. It took me through physics and calculus in college and the start of my engineering career.

Regretfully a trip though the washer and dryer in the pocket of a jacket killed that calculator. I have bought and used other calculators but the 15C has always remained my favorite. When I saw this app, and it was made by Hewlett-Packard, I did not hesitate to purchase it.

Reports the the app does not work with the latest iOS are out of date. Hewlett-Packard updated the app and it works flawlessly. As of this review I am using iOS 12.1.4.