Hi @icebeam, and thanks for getting in touch. Unfortunately, the Tobii ET5 has no current means to interact with the Android Operating System.
If your intention is to have the eyes tracker for research or usability, then we would refer you to Tobii Pro which has a number of solutions such as the mobile device stand: https://www.tobiipro.com/product-listing/mobile-testing-accessory/
and Tobii Glasses: https://www.tobiipro.com/product-listing/tobii-pro-glasses-3/