This would provide a chance to pull back a player that hasn't been on in awhile, plus it helps players that are missing certain mods to know when they are available for purchase without a daily check. This could be for Banshee and any other vendor that sells mods. That is the most basic variation on the theme, but this could be carried forward to a checkbox to see what they want to track. Are they working towards a seal and need a specific nightfall, raid challenge, or other time-gated triumph? The app could have a list of things to track and let them know when they are available to complete.