I find the pricing totally fair. You're doing a great job.
Keep in mind lots of the complaints of 'too expensive' come from one of two groups - either people from low income countries, or young people.
If you asked me to pay 15 bucks a year for sync when I was 16? Hell no, I'm not paying that much money for it!
Now, at 27, it's what I earn in like 20 minutes at my job. I think those 20 minutes A year are more than worth what this app offers.