If you don't have Apps section, Select Add section in Header.
If you've already had Apps section, select Add block
Choose Apps, then find Product Buy Tracker
Add Product Buy Tracker to Header by click app
App will be visible in Collections and Product page
Below is app setting. It contains setting for both Collections and Product page
App will generate badge for which product has been bought by login customer.
You can use setting to change color and text of badge.
In below picture is demo version for theme customize.
App will generate banner in Product page with bought date for which product has been bought by login customer.
You can use setting to change color and text of banner.
In below picture is demo version for theme customize.