Why doesn't Clue's cycle length match the app?

A Clue record with is_predicted_cycle set to true belongs to a cycle Clue has not completed yet, so its cycle length is Clue's current projection.

A record with is_predicted_cycle: true belongs to a cycle Clue has not completed yet, so cycle_length_days is Clue's current projection for that cycle.

Terra sends one menstruation record for each day of a cycle Clue returns.

• For a cycle Clue has completed, is_predicted_cycle is false and cycle_length_days is the length of that cycle.

• For the cycle still in progress, is_predicted_cycle is true. cycle_length_days holds Clue's projected length, and predicted_cycle_length_days carries the same value.

A projection can change as the cycle goes on, and it will not necessarily match the typical cycle length shown in the Clue app. Records for the same days fetched after Clue completes the cycle carry is_predicted_cycle: false and the confirmed length.

To act on confirmed cycles only, use records where is_predicted_cycle is false.

Field definitions are in the menstruation data model.