Thanks for the advice.

I don't necessarily feel like I have nailed the business model right now - I'll see how it goes. More broadly speaking, I think the jury is still out on subscriptions in productivity apps. Everyone is trying to get away with it now - and it is very attractive as an indie developer.

For what its worth, I feel similarly to you. I buy year long auto-renewable subscriptions, immediately cancel them, and then resubscribe if I'm still using them next year.