Flawless I used the free version for a couple of years and decided to upgrade because I believe it's only fair to compensate the developers for such a good app. It's s fast, easy well designed and accurate calculator that leaves nothing to wish from a separate, dedicated device. If only all apps did their work the way this one does...
When it's the best, it's the best. This app has been the best spent money in all the play store. It's fast, accurate, stable, configurable and it is really the perfect calculator. And I can say the same for both algebraic and RPN mode. A must have if you need a scientific calculator! And unlike other apps, it's becoming better and better in a steady and sure way. Can I give 6 stars?
Worth every penny Hands down the best, most fully featured calculator available for android. The conversion feature is particularly useful which allows quick and easy conversion of temperature, speed, mass etc without the need for equations. A fine piece of software with an excellent developer behind it.
Excellent I double check calculations for construction all the time and this calculator comes in handy. It eliminates the need to have a phone and a separate device. Especially with the conversion function built in. Tried it for free for a while, then upgraded to the full version. Haven't had any problems or issues with the product.
Worth it Been using for a long time and think its 'bout time I paid for it. And its cheap at twice the price. Keep up the excellent work. *** Update. Now using Samsung Note 3 and still using Pro version. Terrific ap!
Best RPN Calculator.!! Reminds me of my old HP 41CV. Anything less than a 5 star rating is just plain wrong.
* Homescreen widget now supports RPN (follows app by default, can be changed in settings).
* New delta-percent function.
* Support for Android 6.0 Marshmallow.
Simple calculator with complete history (virtual tape, a.k.a. ticker tape style)