A method for processing sensor data of a continuous analyte sensor transcutaneously implanted under the skin of a body of a host, the method comprising: initializing the sensor for a sensor session, wherein the initialization is triggered by a user making a selection on a menu of a user interface associated with the sensor prompting the user to begin initialization or triggered by a mechanical switch which is automatically tripped when sensor electronics associated with the sensor are snapped into a snap-in base with a contact portion of the sensor being electrically connected to the sensor electronics and a sensing portion of the sensor extending through the base into the host's skin; determining, by a processor of the sensor electronics, whether the sensor has been previously used for a prior initialized sensor session; responsive to determination of no previous use of the sensor for a prior initialized sensor session, applying, by the processor, a first set of time-dependent algorithmic functions to sensor data, during a first interval, based on a first elapsed time since the sensor was implanted, wherein the first set of time-dependent algorithmic functions comprise a first boundary of acceptability, wherein the first boundary comprises a first drift rate of the sensitivity over time or a first drift rate of the baseline over time; and responsive to determination of previous use of the sensor for a prior initialized sensor session, applying, by the processor, a second set of time-dependent algorithmic functions, different from the first set of time-dependent algorithmic functions, to the sensor data, during a second interval after the first interval, based on a second elapsed time since the sensor was implanted, wherein the second set of time-dependent algorithmic functions comprise a second boundary of acceptability, wherein the second boundary comprises a second drift rate of sensitivity over time or a second drift rate of baseline over time. initializing the sensor for a sensor session, wherein the initialization is triggered by a user making a selection on a menu of a user interface associated with the sensor prompting the user to begin initialization or triggered by a mechanical switch which is automatically tripped when sensor electronics associated with the sensor are snapped into a snap-in base with a contact portion of the sensor being electrically connected to the sensor electronics and a sensing portion of the sensor extending through the base into the host's skin; determining, by a processor of the sensor electronics, whether the sensor has been previously used for a prior initialized sensor session; responsive to determination of no previous use of the sensor for a prior initialized sensor session, applying, by the processor, a first set of time-dependent algorithmic functions to sensor data, during a first interval, based on a first elapsed time since the sensor was implanted, wherein the first set of time-dependent algorithmic functions comprise a first boundary of acceptability, wherein the first boundary comprises a first drift rate of the sensitivity over time or a first drift rate of the baseline over time; and responsive to determination of previous use of the sensor for a prior initialized sensor session, applying, by the processor, a second set of time-dependent algorithmic functions, different from the first set of time-dependent algorithmic functions, to the sensor data, during a second interval after the first interval, based on a second elapsed time since the sensor was implanted, wherein the second set of time-dependent algorithmic functions comprise a second boundary of acceptability, wherein the second boundary comprises a second drift rate of sensitivity over time or a second drift rate of baseline over time.