Keep On: Simple Habit Tracker is a one-time purchase app where habits appear as cards on a Today screen. Users hold a card to mark it complete, and target habits fill in as progress is recorded. Habit pages show current and best streaks, goal completion, a full-year history, and upcoming milestones. The tracker supports habits to build, habits to avoid, and measurable goals such as water or practice time, with schedules from daily to monthly. Apple Health can automatically contribute steps, exercise minutes, and active energy, while Screen Time can help track limits for selected apps. Home Screen and Lock Screen widgets, Apple Watch controls, and reminders support quick check-ins. The developer says Keep On has no account, ads, or tracking, and that data stays on the iPhone with optional iCloud backup. Apple lists the download at $4.99; the developer says there are no subscriptions or additional in-app purchases.
