memkit

MemKit is the spaced-repetition flashcard app I've always wanted. Here's what I mean:

- Minimal friction to use. You can immediately start using the app. You are automatically given an account. You don't have to sign up or type in a username or password. A lot of times I'm reading a book and I only have my phone on me. It's super annoying to log into an app when you get signed out, especially on your phone and especially if you don't use a password manager on your phone. MemKit lets you jot down interesting things you learn without signing in and then merge them into your account later. This is made even easier through email one-time passwords.

- No demands. You don't have to set an email, phone number, or even a username! But you can, if you want to. Email or phone number is a necessity for account recovery, of course. Note that phone numbers are not yet implemented.

- No ads. No selling data. No emails besides those for sign-in and account recovery. No algorithms ...