To obtain a coverline in the Premom app, ideally, certain criteria should be met based on the logged basal body temperature. These criteria are as follows:

1. The first six consecutive temperatures should be lower than the next three consecutive temperatures, often referred to as the "6 low, 3 high" pattern.

2. The difference between the highest temperature among the previous six temperatures and the lowest temperature among the next three should be equal to or greater than 0.5°F (0.2℃).

To enable Premom to display the BBT spike and draw a coverline, it is suggested that you record at least nine consecutive temperatures in the app. You can either manually enter the basal temperature from any basal thermometer you are using or use the Easy@Home basal thermometer, which automatically syncs with Premom via Bluetooth.

By consistently using Premom, the app becomes more familiar with your pattern, allowing you to reduce the frequency of temperature-taking while still effectively capturing your BBT spike. This helps streamline the process and provides you with the convenience of tracking your cycle more efficiently.