Can the web app be used on a smart phone? If so, port it over. You will be able to charge for it once you build an audience. Starting free and getting these 1st

Can the web app be used on a smart phone? If so, port it over. You will be able to charge for it once you build an audience. Starting free and getting these 1st users to chat about it then later initiate a fee. Or set a decent price for it and go all out with targeted marketing.