I'm more likely to buy an app then a subscription. I really don't understand why developers that don't deliver substantial content through their app think this model is necessary. It in fact discourages me from even testing the app in the first place.
Thank you for your feedback.
You can do a lot with the app, for free. The subscription offers some extra features at a small price (2$/month or 12$/year) and helps me pay for the backend servers costs and ideally it will provide a cashflow to continue investing in it. You can do a lot without paying anything. Using the promo code doesn't require a subscription, it is like a paid app, but free. After the promo code expires you can still use most of the features of the app.
Would you be more inclined to pay let's say 25$ for the full feature app without having the chance of testing it?
Got it. Wasn't aware of the backend supporting the app! Regardless, I'd rather pay upfront. The app can be offer limited time usage with all the features for testing.