twoCalc

twoCalc (US only) and twoCalcFree

Want an easy-to-use two-line calculator with just the features you need? Then twoCalc, the $2, 2-line calculator, is for you! With twoCalc you get to see your calculation as you enter it and edit it if you make a mistake. Even better, your calculations are stored on an internal "tape" that you can access at any time. Recall a previous calculation or result by just tapping on it, or send the entire tape by email. TwoCalc doesn't have all the advanced scientific functions of some calculators (although it does have some), but rather stresses a clean, usable interface for the types of calculations you do most often. And if you don't like the colors or sounds, you can even change them!

Features

Separate calculation and results lines
Keep track of the calculation that you entered. Edit the calculation if you entered it incorrectly.
Easy-to-use
Large keys with optional audible feedback. When run on smaller screens (such as the Pixi), keys dynamically resize to fit the screen.
Operator precedence
Properly handles operator precedence: multiplication and division come before addition and subtraction. 1+2*3 = 7, not 9!
Customizable colors and sounds
You can choose from a variety of sounds (or none) for the key presses. You can choose the colors of the keys and the calculator itself.
Vibrate on keypress
As of v1.1, you can select an option to make your phone vibrate slightly on every keypress.
Calculator tape
Records each calculation and result. Tape length adjustable up to 99 entries. Send the tape via email.
Keyboard entry
Use the physical keyboard as well as the on-screen keyboard to enter numbers and operators. (Not available in twoCalcFree.)
Simple scientific functions
Square root and basic trigonometry functions are supported
Unit Conversions
Conversions for the basic imperial and metric measurements are built in.
Hex/Binary/Decimal conversion
Easily convert between number bases.
Two's complement form
When in hex or binary modes, optionally displays negative numbers in two's complement form, with a user-specified word size.
10-position memory
Retains up to 10 numbers in "permanent" memory. The numbers stored in memory are retained between calculator sessions.
Rapid recall
When not in hex mode, the letter keys immediately recall from the first 6 memory slots.
Assignable function keys.
If you don't need instant access to 6 memory slots, you can re-assign one or all of the letter keys to be any of the scientific functions or unit conversions. (Not available in twoCalcFree.)
Formula storage
Special function allows you to store a full or partial formula to one of the 10 memory slots. This can be used for quick "constant" calculations. For example, if you want to add 115 to a list of numbers, you could store "115+" in memory, then quickly recall that part of the formula and just enter the number you want to add to it.

Review the complete instructions or license agreement.

If you want to see what has changed in the latest version, check out the change log.

If $2 is too expensive, then twoCalcFree offers a great way to try twoCalc! You will have fewer colors to choose from and you will enjoy ads from our sponsors every few calculations, but once you use twoCalc, you'll probably want to upgrade to the full ad-free version.

twoCalctwoCalcFree
$2*Free
No adsAds appear every few calculations or few minutes
Can use hardware keyboardOn-screen keys only
Re-assign A-F keys to functionsMust use Fn key to access functions
Optionally save tape between sessionsTape is cleared when you close twoCalcFree
Choice of background colors4 fewer background choices
Lots of button color choices14 fewer button colors
Choice of key font colors7 fewer key font colors
Check for new messages weekly (can be changed or disabled)Check for new messages daily (can not be disabled)
Available where Palm supports paid appsAvailable world-wide

Please note that only twoCalcFree is available in locales where Palm doesn't yet support paid apps. As soon as Palm supports paid apps in other locales, we plan on making twoCalc available there. *Price may vary outside of the US.