Abstract: Improved graphical user and digital interfaces for analyte monitoring systems are provided. For example, disclosed herein are various embodiments of GUIs including Time-in-Ranges, Analyte Level/Trend Alert, and sensor usage interfaces. In addition, various embodiments of digital interfaces are described, including methods for data backfilling, expired or failed sensor transmissions, merging data from multiple devices in an analyte monitoring system, transitioning a previously activated analyte sensor to a new reader device, and autonomous sensor system alarms, among other embodiments.