OpenHIIT

Free, open-source HIIT and Tabata interval timer app for iOS and Android.

Mobile appfree

OpenHIIT is a free, open-source interval timer app for Android and iOS built for HIIT and Tabata-style workouts. It lets users create unlimited custom interval timers with audio and visual cues, label intervals with exercise names, and save, export, or import timer configurations, with no ads, paywalls, or subscriptions.

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