Passwordless login in mobile apps

This post touches some problems with traditional email logins in mobile apps and suggests a different approach to handle login without requiring the user to enter any password. The post is not very technical. Other than occasionally mentioning “client / server” it doesn’t talk about any specific framework / language. Instead, it tries to explain the overall flow and behaviour of passwordless login in mobile apps. I might add some additional framework specific code examples later but for now it’s mostly ideas. »