Unfortunately, after testing most existing protective cases in the marketplace, we've discovered that none work with Osmo. For this reason, we are currently designing a new solution, which we expect to have available in mid-2018.
We do have some good news to share regarding screen protectors; Osmo *is compatible* with the ZAGGInvisibleShield, or any similar screen protectors that have the same or less thickness, and don't cover the edges of the device. Screen protectors that are thicker than the ZAGGInvisibleShield, or cover some of the device edges, are not compatible with Osmo.
As mentioned above, we do plan to have an iPad case solution available in mid-2018 and will update everyone then. Thanks so much for your patience!