I started at $10 per year, then gradually raised prices as the product got better, always keeping existing subscribers happy by grandfathering them. At one point it was $4.99 every 3 months, which is the plan my mum is still on :-) For a brief time I offered a lifetime subscription for $100 and sold a few but felt uncomfortable offering to keep the service running forever with no further payments so killed it.
I ended up at $5 / month or $48 / year. It's possible I might increase it a bit more in future but for now I think it's better to keep these prices and try to grow user numbers instead.
One thing I noticed with some companies was that the yearly plan was very heavily discounted compared to the monthly one. To me that gave the impression of lacking confidence that monthly users will stick around long term, so I didn't want to do that.
Yeah I think it's true that popular mainstream consumer products tend to be cheap and highly polished, and that more niche products tend to be higher priced and less polished.