Tape Measure Deluxe Calculator

Recommend for engineers, fabricators, designers, and students who like to try with the slick tape measuring feelings. You can verify the input lengths before performing super fast calculations. It is a great tool especially for aluminum framing fabrication.
Two videos show exactly how smooth and how fast the calculations.
Features:
1. no more digits input keys.
2. continuous calculating methods.
3. has 6 output formats. (3 for Imperial, and 3 for Metric)
4. has 6 levels accuracy levels.
5. results can be emailed.