As a user, you can easily log in to LetDialog using Face ID or Touch ID on your smartphone.
The first time you download the app and log in, you'll need to approve Face ID or Touch ID. Please note that Face ID / Touch ID can only be connected to one user on LetDialog at a time, so if you share your phone with another user, you should not approve with Face ID or Touch ID.
Enable Face ID/Touch ID in your smartphone settings
If you initially declined to allow login with Face ID or Touch ID, you'll need to enable it in your phone's settings.
Find LetDialog in your smartphone's settings and toggle the slider for Face ID/Touch ID, as shown in the picture below. The image is taken on an iPhone, so it may look slightly different if you're using a different smartphone.
Please Note
Not all smartphones support Touch ID or Face ID.
You can check this on your smartphone manufacturer's website.