Which Ethereum dapp(s) have you used on your laptop in the browser with MetaMask that you wish there were a standalone mobile app for?
None. The dapps out there are still useless.
Generally speaking, I would prefer apps that require more frequent engagement (eg banking/finance [exchanges], communication [peepeth], ecommerce [not sure if these exist yet].
An Augur mobile app would be nice.
None. Ether is going nowhere fast, so is most crypto. Virtual currencies in games have more life than blockchain zombieware. I hope I eat these words because we do need digital privacy, but I'm just not seeing much value being created beyond speculative bubbles.
For anyone curious, I found this list of popular dapps: