Looking for Beta-testers for my new Ios chess training application

I am in the final steps of development of a chess training application and would like to find chess players of average chess club strength ( between 1600-2000 elo) that could be interested in beta-testing the application and providing initial feedback before distribution. The minum requirement is Ios 7.0. The application is a major evolution of Tapchess (http://www.tapchess.com) also developed by me. The initial release will contain 5 volumes prepared by two different authors ( a FM and an IM). Three volumes contain attacking games by famous GMs and the user is asked to find the best moves at critical points . Two volumes are about common mating patterns. The first one will be easier while the second one will build on the knoweldge provided by the first one to present more difficult quizzes. If anybody is interested please contact me at: info@tapchess.com