BikeWatts for iPhone®, iPod Touch®, and iPad®

Calculate your speed, estimate your power output, and estimate how many kilocalories you burn on your bike given your weight, tire size, gear selection, cadence, and slope. Metric and imperial weight and speed units are supported.

SUS-A for iPhone®

The System Usability Scale – App (SUS-A) is intended for human factors practitioners, usability engineers, user experience researchers and designers, and other individuals needing a statistically valid and reliable usability rating for a system under review.