I agree with @RachelArmington -- seeing the "not secure" thing can be less than awesome.
If I understand correctly, Google prefers HTTPS. So, if SEO matters to you, definitely do it. I don't know how all hosting services handle this, but all the different ones I have used offer it for free these days or even offer it automatically. I have had to actually set this up for websites I have done (it's my day-job), so it's not always automatic, but it is worth the effort IMO.
Good luck! Your Jaz and Rabbot project looks very cool!