CBT-i Sleep Calculator app for iPhone, iPad and Mac
CBT Insomnia sleep time/efficiency calculator with Apple Watch® integration.
CBTI Cognitive Behavioral Therapy for Insomnia - a tool for simplifying sleep time calculation in the practice of Cognitive Behavioral Therapy for Insomnia.
Sleep and awake times can be entered manually or by connecting to Apple Watch sleep data via the Health app.
Features history graph and adjustable sleep efficiency settings.