Streaks — The habit-forming to-do list

Streaks is a habit-tracking app that helps users build positive routines through daily task completion. The iOS app displays up to 24 habits as visual circles that fill as tasks complete, with streaks counting consecutive days. Deep Apple ecosystem integration connects to Health (automatic exercise tracking), Reminders, and Shortcuts. The app's constraint of limited habits forces users to focus on what matters rather than tracking everything.

Streaks' interface is radically minimal — circular icons on a black background with nothing else. The design won Apple Design Awards for this focused simplicity. Each habit appears as a ring that fills to completion, providing instant visual status. The color palette lets users customize habit colors, creating personal visual systems. No navigation menus, no settings screens cluttering the main view — just habits and their streaks. The design philosophy: reduce until only the essential remains.

• **Ring Completion Animation**: Tapping to mark complete triggers a satisfying fill animation with haptic feedback. This micro-interaction makes task completion feel rewarding, reinforcing the behavior loop.

• **Streak Counter**: Each habit shows consecutive completion days. The simple number creates loss aversion — users don't want to break streaks they've built, motivating daily action.

• **Health Kit Integration**: Steps, workouts, and other Health data can auto-complete habits. This eliminates manual tracking for behaviors already monitored, reducing friction while maintaining awareness.

• **Negative Habits**: Users can track behaviors to avoid (no smoking, no alcohol) with inversion logic. This expands use cases beyond positive actions to breaking bad habits.

• **Siri Shortcuts**: Voice commands complete habits hands-free. "Hey Siri, I took my vitamins" updates the app without opening it — meeting users where they are.