To bring usability to Ethereum on Android we not only need to work on applications like WALLETH - we also need to work on the infrastructure. One important pillar is ERC-67. Today I opened a PullRequest for K-9Mail to support ERC-67 and cketti was really fast with the merge:

So the next version will have support for “ethereum:” URIs. But we need this for more places - e.g. twidere could really use it. Currently I always have to copy and paste when rinkeby test ether is requested on twitter ;-) And copy and paste is dangerous with addresses - It is OK for test-ether - but for real ether I would hesitate