(Interlocken Technology)
PaperCalc, PaperCalc 3 and PaperCalc 3 Office
Three feature-rich calculators designed for Apple's iPhone(TM), iPhone 3G(S), and iPod(C) touch.
Use the PaperCalc products to produce an accurate paper tape trail of your calculations, timestamp whenever necessary, and easily email to yourself or a friend for printout and a permanent hard copy.
A variety of PaperCalc offerings all offer the same crisp look and feel and are optimized for either scientific use (PaperCalc 3 & PaperCalc) or for an office environment (PaperCalc 3 Office).
PaperCalc 3 - just released September 28 to the App. Store. PaperCalc 3 has the look and feel, and scientific keyboard, of the original PaperCalc. PaperCalc 3 adds features that are unique to iPhone/iTouch OS3.0 that include: 1. paste numbers, or a range of lines, to the Apple clipboard, and 2. the ability to email the paper tape without leaving the app.
PaperCalc - the original PaperCalc. A fast feature-rich calculator with 25 scientific functions on a scroll left keyboard. PaperCalc only requires OS2.1 and will continue to get additional language support.
PaperCalc 3 Office - same feature set as PaperCalc 3 but optimized for an office environment with large oversized keys and no scientific functions
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Main Features of PaperCalc 3, PaperCalc, and PaperCalc 3 Office:
Design your own keyboard layout or use one of two default.
PaperCalc 3, PaperCalc, & PaperCalc 3 Office email (see below) - Includes line numbers on the left, and line separators. All comments and calculations are preserved accurately and can be printed for a permanent hard copy. (NOTE: PaperCalc 3 Office does not have the scientific functions.)
Sample Main Keyboard (below) - A 25 function scientific keyboard is to the left of the main keyboard and is easily accessed by scrolling the screen with a finger (scientific functions available with PaperCalc 3 and PaperCalc only).

Tap on any line and grab a number for use in your current calculation. Think of the paper tape as a deep memory storage system for holding intermediate results.

Use the same alert box to add, or edit, a comment on any line.

Papertape after adding comments on lines 17 & 18.

Thousands and decimal separators for Switzerland locale. All Apple international keyboard locales are supported by PaperCalc.

Easily check a running total of numbers like bank deposits. Scroll the paper tape to review up to 250 lines.

Keep track of complex trigonometric functions as well.

Use the envelope button to email, clear, or timestamp using the alert dialog.