Plus42

I purchased this HP42 emulator today. I am a long-time fan of HP calculators and a keep collector of both HP and SwissMicro products. This is the same form factor, but an improved version of the SwissMicro 42S calculator, which is also based on the free version of this emulator. Love the SwissMicro calc, and love this iOS calc. Well done Thomas Okken. Great work. This one is a keeper, and well worth the money. Five stars!

Used the original HP-42S when at university.Was great .But the newer Plus42 is even better again.Very happen with this purchase. Thomas Okken knows everything about Hp [in my opinion] and proves it ,with both , his original version of the HP-45 and the latest Plus42 - the latter is even better!

This is an amazing improvement on my favourite calculator. I have only one quibble. It takes 5 taps to import a program after uploading. For my vast array of programs this gets annoying very quickly. Please consider the ability to select multiple programs at once to import. EDIT: thanks for the multi-export tip Thomas. Worked perfectly!

In college I was an HP41C user. Once in my first engineering job I switched to the HP42S which has served me well over my 30+ year career. Once iPhones became a thing, I loaded Thomas’s Free42 and have been using that for a couple decades. I still have a real 42S on my desk for daily use. I recently purchased an HP Prime which is a lovely calculator but it’s just not completely comfortable to use. Switching to Thomas’s Plus42 feels really comfortable and adds lots of lovely features. I will likely purchase a SwissMicro DM42 to be used as my daily desk calc so that my phone app and physical desk calc are similar. That would send the 42S to the vintage calc cabinet. Honestly having this on my phone is massively so functional it’s hard to justify even owning a physical calc but there are times at the desk when it’s nice to grab the physical unit with tactile keys that can’t be interrupted with alerts :-). This is a beautiful upgrade to the free42. Thanks Thomas!

When using on iPad, the app occupies the whole screen. Currently it does not support multitasking. But it would great to share the screen with other apps (side or floating window).

Thomas has done an outstanding job on this app! It is not only the most beautiful calculator app out there, but it’s also the most powerful and functional of any of the HP inspired calculator app. The graphics are outstanding and the “extras” that were added in addition to the 42s standard makes the app even more appealing. If you know how to use a RPN calculator, this IS the one to have and use. If you don’t know how to use a RPN calculator, learn how and buy this. I always carry my phone, but rarely my physical DM42 or “real” 42s. You won’t regret getting this app. Congratulations Thomas for all the work you have done over the years relating to the 42. You should be proud.

With some programming, this can replace both of my units conversion and finance calculators apps. It is that powerful. I hope - and still have not figured out - we could use and call the TVM variables (PMT, FV, etc) in our custom programs, rather than duplicate the already available functions.

This calculator is the one I use first. It's powerfull, excellently done and works allways as expected. Also, it's well maintained. I wish all apps were made with this quality level.

Have been using Free42 for years but Plus42 is Free42 on steroids. The new features like Dir and Eqn are great enhancements. Many thanks for to this developer for all his efforts.

I have been using free42 for long time and I am glad you are offering a premium version and I can contribute to the developer of a great app.