Create up to 3 notes? Srsly? :-) I don't need to collaborate to 50 people like a real "pro" would but I won't even bother registering to create 3 notes. Something around 1000 notes would make a reasonable limit for a free personal edition.
I mean, the same page also says "We need to charge, because we can't sell your data", so let's not get stuck on such a small detail.
I must say that for a just-launched utility SaaS, this looks remarkably well done. Clear targeting, good website, no nonsense.
But I'm not going to bother trying it at "3 notes for free".
. "Personal Free: Ideal to get started"
A 3-note-limit is not "ideal" for anything.
It would be better advertised as a free trial (purely for evaluating otherwise paid-only service), rather than pretending they have a free plan.
I'm not saying 1000 notes is the answer. Maybe its 50, maybe its 500. But 3 certainly is limiting.