RiVal.T is a powerful, distraction-free countdown timer app. Create and manage groups of sequential timers, each with customizable sounds, vibration, and visual alerts. The app features: Sequential Timer Groups: Organize timers into groups that run one after another, with optional transition beeps and customizable alarms for each group. Drag and drop timers between these groups. Flexible Timer Editing: Set start, warning, and final thresholds for each timer, with intuitive picker

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