A mobile app to help you understand the affect of changes of a number of variables on a rowing shell and a rowing oar. See the affect on Load, Gearing, Work Distance, Arc-through-Water and Overlap (when applicable) for changes to Total Length, Inboard, Outboard, Spread/Span, Catch and Finish Angles. Lock a variable for oar variable adjustments to automatically change the other oar variable. You can then name and save the 'scenario'. Scenarios can be reloaded or removed. The App does not come with any preloaded scenarios.