When you connect Wunderlist to Rindle, you’ll have a couple Drops to choose from:

Any new to-do you create This Drop will pull in any new to-do within a list in Wunderlist
  Any new to-do assigned to you This Drop will pull in any new to-do that is assigned to you (requires Wunderlist Pro)

When you trigger the Drop you set-up, a card will be created in Rindle, like this:


That card ends up on a Board and List that you specify:

Rindle Wunderlist Drop Card

When you open that card, you can see the to-do and even open it back in Wunderlist:


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