As another commenter said, $5 is a terrible price.

$5 a month works for apps with huge user bases and they just take the small conversion and that makes their business run. And this is never web apps (certainly not new ones because the easy ones already exist).

If you charge $30-$100 a month you have to find 10 times less people which is way way easier for a small web dev. Yes the problem you solve will have to be more acute but a. There are actually loads of rich people out there - more than you think and b. You now basically only have to build for your most committed users.

See 1000 True Fans for better, fuller explanation: https://kk.org/thetechnium/1000-true-fans/