I appreciate all the work you put into this. Unfortunately the site is relatively unreliable. I don't think I'm alone in saying I'd pay for the service if it were more reliable. Maybe that's just me.

We all have priorities and I'm sure you're no different. You've got a certain following (I've been using for two years now). Maybe offer a free version that only tracks weight for the last three months (or whatever) but then let users pay for more access / features (to offset the costs of dev and hosting).