So secure is your password! shows you, how long a modern computer would need to crack your password via trial and error!
The level of safety is shown via a time indication, that ranges from instant (smaller than 1 second) to billions of years, depending on how strong your password is.
+++ Caution: Neither does this app need any kind of permissions like location etc., nor does it stores the passwords on the device or uploades them anywhere. Therefore it's 100 prct. safe! +++