This should not be an app - it should be a service, billed at $12/year (or $10 for a 3 month pass), with fresh content/languages added regularly. This would tur

This should not be an app - it should be a service, billed at $12/year (or $10 for a 3 month pass), with fresh content/languages added regularly. This would turn your company into something potentially investable, and would give you a steadily increasing stream of income. You'd also be able to increase the price over time as you add more and more value to your offering. This should also be a web app, as many people have pointed out to you. As awesome as mobile is, web is still easier to share and convert users on, and while everyone has a web machine, not everyone has a tablet.