The only calculator you will ever need

1-Calc is a revolutionary calculator for the Pocket PC. It uses big buttons you can easily hit with your finger. The buttons provide clear audible & visual feedback of being pressed. It has been designed to be your "everyday" calculator that you can quickly pick up & use for a few basic calculations.
But 1-Calc is much more than this. Using the Pocket PC up/down buttons or the green option button, top 2 lines of buttons can be scrolled to display other functions including:

Basic Functions
The most common calculator functions at your fingertips: +, -, x, ÷, +/-, 1/x, %, √, ³√, x², x³, full memory functions, x^y, !, Exp, 10^x, e^x.

Backspace to edit mistakes, brackets to frame your expressions correctly.
Also supports Algebraic, RPN & DAL calculator modes.

Scientific Functions
Full scientific calculator: sin, cos, tan, deg/rad/grad, PI, sin-1, cos-1, tan-1, sinh, cosh, tanh, log, ln, sinh-1, cosh-1, tanh-1, Dec->Deg, Deg->Dec, XY->R, Rθ->X, XY->θ, Rθ->Y, Random, nPr, nCr, Last Answer.

Useful constants for scientific calculations are also available as a group of buttons. You don't need to keep constants on a scrap of paper any more!

Currency Converter
1-Calc grabs the latest currency rates from the Internet so wherever you are, you always have the latest rates with you!

With Battery Pack Pro installed, tap on the currency rate in Power Time and be taken directly to 1-Calc to convert your money.

Unit Converter
A full unit converter that not only helps for the everyday conversions (e.g. km/miles, Fahrenheit/Celsius), but also for the unexpected (what's my shoe size in Europe?!?). Unit conversions include:
Distance, Temperature, Speed, Volume, Cooking, Computing, Area, Energy, Power, Mass, Force, Pressure & Clothing sizes.

Tip Calculator
Quickly work out who should pay when you're out with friends!

Memory Banks
1-Calc has 5 different memory banks to store your last calculation, not just 1 like most usual calculators. Plus it has copy / paste buttons to allow results to be copied to / from other programs like Excel or Word.

Base Converter
Quickly convert between binary, decimal, hexadecimal & octal.

Customization
Want to display all your buttons at the same time? No problem! 1-Calc can display 40 smaller buttons on 1 page, and a quick tap of the up/down button can display 80 more.

1-Calc also allows button groups to be customized so you can display just the buttons important to your everyday calculations.

Plus, 1-Calc has many different options to allow you to set up 1-Calc for how you want it:

• Normal, fixed, scientific, engineering notation
• RSS, DAL, Chain & Algebraic modes.
• Display using regional settings
• Repeated equals
• Cleartype support
• Manually update currency figures

Localization
English, Français, Deutsch, Español, Italiano, Portuguese, Catalan & Traditional Chinese.

Want even more 1-Calc?
The 1-Calc Expansion Pack includes two great features:

1-Calc for your PC
Click on the PC's system tray to get all the features of 1-Calc on your desktop or laptop computer.

6 Great new skins
Find a cool new look for 1-Calc, or have a different look for every day of the week!

Purchase 1-Calc & the Expansion Pack together and get 50% off the Expansion Pack. Click here!

More detailed information
Version update information
Help documentation
Skinning 1-Calc
1-Calc Expansion Pack
FAQ