If you're an iPhone user: Spot On integrates with Apple Healthkit. If you would like to import period data from other apps, you can sync the data to HealthKit and it will automatically populate in Spot On. To ensure you have HealthKit enabled in Spot On, open Apple Health > Health Data > Reproductive Health > Menstruation > Data Sources & Access and ensure that Spot On is toggled on. This will import any previous period data from HealthKit to Spot On.
If you're an Android user: Unfortunately, there isn't a single way to import period data from an outside source or app. However, you can manually input previous period data up to 2 years in the past.
If you want to manually add past periods: To add past periods, we recommend entering Calendar view, and tapping on the day you are looking to add a past period. The app will take you to Day View for that day. Here, you can enter your period and flow. You can scroll as far back as 2 years to add periods or other information.