If you try creating an account using your smartphone, these platforms don't seem to have strong password requirements. They both enforce a minimum 6 character limit and nothing else (I did however notice Twitter seems to filter out certain passwords like 111111 whereas this is a legitimate password on Facebook).
I can understand that enforcing strict rules such as uppercase, lowercase, number, and symbol can frustrate users and make passwords less memorable. However, I'm not convinced how the current password validation (or lack thereof) is a better choice.
Why do these apps not enforce the aforementioned guidelines? If I'm creating a new app now, how should I approach this problem?