If your app is good enough to charge for any features at all, then you should probably just go ahead with paid plans with free trials. You can make it really ch

If your app is good enough to charge for any features at all, then you should probably just go ahead with paid plans with free trials. You can make it really cheap for early customers (and keep it cheap for life for them) and slowly increase the price for new customers - call it the cheapium model. The value of initial users is finding out what's actually useful to them (what they would pay for) and any major bugs/issues in your product. But you have to be careful you are not listening to the wrong users (who never intend to buy anything from you). You are selling to businesses, so you probably need to focus more on direct and ad-based selling rather than going "viral" among the wrong userbase.