Opal is a screen time app founded in 2020 by Kenneth Schlenker. It is based in the US.
Users choose apps and websites that steal their time and set sessions or schedules when those are blocked. Deep Focus mode makes a block hard to break before the session ends. Opal shows daily screen time, focus score and how much time was saved, and it can limit apps after a set number of minutes per day.
The free version covers basic blocking. Opal Pro adds unlimited schedules, app limits and the stricter modes.