Individuals with autism or anxiety may find calming apps helpful. Endel: Focus, Sleep, Relax is an iOS and Android app that uses algorithms to provide soundscapes. They vary based on the users location, weather conditions, and heart rate. Modes include focus, relax, on the go, and sleep. Endel is said to be effective with focus, relaxation, deep concentration, and calm sleep for the user. Some modes include an interactive feature which responds to touch.
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https://search.bridgingapps.org/apps/fd5a80c7-9e63-4f0b-830d-82122f376648