The latest version of Meds Tracker is now available on the store and it finally has support for backing you meds list to your OneDrive account. This feature is now available in both the paid and free versions of Meds Tracker which means it should now be painless for users who start with the free version to upgrade to the paid version (no ads and richer scheduling support). It also comes in handy for other scenarios like upgrading to a new phone and not having to re-enter all of your medications again.
You can read more info on how backup/restore works here. Lastly, this update only works on devices running Windows Phone 8.1. Users running Windows Phone 8.0 or earlier devices and still use the previous versions of Meds Tracker but new updates will only be happening for users of the 8.1 or newer versions of Windows.