Forest, SelfControl, Notion Calendar, HazeOver, Offtime, Plucky, Stop Procrastinating, Citrus, Reclaim, Sorted, WindowFX, Amie, Time Companion, HEY Calendar, SkedPal, Vitamin-R, Serene, Zero Willpower, SiteCop, DetoxDroid, Wisdom Tree, BrowseControl, FindFocus, SelfRestraint, Window Focus, StayFocused, AntiSocial, UnDistracted for macOS, Focus Extension, Sidetracked, Focus (for ChromeOS), Timeliness, Focus by Masterbuilders are some alternatives to Motion App.