Intervale

Intervale is a free interval timer for iPhone and Apple Watch, built for HIIT, circuits, Tabata, rehab and gym sessions. You build named timers from your own steps, each with its own work and rest time, and repeat them for as many rounds as you like with an optional rest between rounds. Both sides of an exercise can be added in one go. Timers can be chained into routines, with a break countdown between them or a pause that waits until you're ready. While a timer runs, a big colour-coded countdown shows the current step and what comes next, and sounds, spoken cues and haptics mark every change, so you never need to look at your phone. It keeps running in the background and with the screen locked, and History shows the workouts and routines you have finished. On Apple Watch, the timers sync from the iPhone and run from the wrist with a tap for every change, even with your wrist down, and the sessions file into History on the iPhone. On iPhone Duo, opened out sideways, the timer list and the editor sit side by side. Version 1.1 added Apple Health and Siri: finished workouts can be saved to Apple Health, and timers can be started and listed by voice or from Shortcuts. Version 1.2 added sharing: any timer can be shared as a link or a QR code, links open on intervale.app or straight into the app, and the person who shared a link can see how many people viewed and added it. A Discover list offers ready-made official timers to add in one tap. Version 1.3 added routines, uses Apple's own live workout session for calories instead of an estimate, and brought a full accessibility pass: VoiceOver announcements for every phase change, larger text throughout, higher-contrast text and bigger controls. There is no account, no ads and no tracking. Built natively in Swift with SwiftUI and SwiftData, with a watchOS app using WatchConnectivity, synthesised audio cues through AVFoundation, HealthKit for Apple Health and App Intents for Siri and Shortcuts. The landing site and share pages are a SvelteKit app at intervale.app. Version 1.3 is available on the App Store for iPhone and Apple Watch: https://apps.apple.com/app/id6821462381