Feyenally

Feyenally lets you test your vision for refractive errors right from your phone—no optometrist visit required. It works by having you look through a series of digital charts on your screen while the app measures how well you can see different patterns, essentially recreating the experience of sitting in those uncomfortable waiting room chairs but from your couch. Refractive errors (near-sightedness, far-sightedness, astigmatism) affect over a billion people worldwide and most of them don't get checked regularly because scheduling a doctor appointment is a whole thing. Feyenally said "what if eye tests were as easy as checking your email" and honestly, that convenience factor alone makes this one to watch. This one's live on Product Hunt.