For people with skin problems:

With the caveat that I only just signed up for this, and that it's only for the US and doesn't cover all states: PocketDerm looks really cool?

You fill out a form and talk to a dermatologist online, and they periodically mail you prescription-strength acne/wrinkle goop, which is included in the $20/month subscription cost. (They'll also write prescriptions for oral stuff, which you take to a pharmacy as normal.) They formulate the creams themselves, but they typically contain Retin-A/tretinoin, which is considered The Best Skin Stuff.

It's $20/month including the cream, which is not much more than I'm currently paying for kinda-functional OTC acne cream. (I live a very sad life.) If you use a referral code (https://pocketderm.com/invite/QSMH6Q6) you get the first month free, and the referrer (me) gets a $10 credit.

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I was moving the laser pointer up and down and the battery died. The cat kept bobbing his head for several seconds afterwards. He turned to look at me reproachfully, head still bobbing, up and down. I'm sorry that I broke your head, cat.