Ad-Free CALC 1 Financial Calculator app for iPhone and iPad

Instead of copying a hardware calculator, CALC 1 brings the best features of popular HP and TI financial calculators to iOS to make it more powerful and easier to use.

CALC 1 has chain, algebraic and RPN calculation modes found on TI and HP calculators. So no matter which of these systems you prefer, CALC 1 has it.

CALC 1 has "undo" to protect you from mistakes and it keeps a history of your calculations so you can easily recall the results. STO and RCL displays the "key preview", the value right on the key!

CALC 1 uses iOS design principles like simple individual focused calculators, gestures, a flexible, easy to read display, key hints, calculation history, online documentation, undo and more.

CALC 1 is best used for: Accounting; Banking; Business Studies; Finance; General Math; Real Estate; Science; Statistics; Pre-Algebra/Algebra

Buy CALC 1 and get the best features of the classic calculators instead of a copy of just one.

In-App purchases allow you to download CALC 1 for free and evaluate it before making any purchases.
Then you only need to buy the features you want.

Free CALC 1 has the following In-App purchases available:

-Downloads allows you to download over 60 Focused and Formula calculators.

-Customization allows you to copy and paste keys to easily create your own custom calculators. You can also create a new key, similar to creating a contact.

-Form Calculators make it even easier to calculate loans, time value of money, amortization, bonds and depreciation. This also allows currency and UOM conversions.

-Styles to allow you to choose millions of combinations of screen styles and key colors.

Buy CALC 1 and get the best features of classic calculators instead of a copy of just one.