Small bug report: The filter input field on the all entries page grabs focus when the page loads. This causes the Android keyboard to appear every time.
Android/iOS is an interesting idea for a business.
They already have secure app distribution. A private channel in the Google play store or via app store adhoc.
Communication between the devices via a server should be possible at least using HTTPS but also private/public key encryption. Doesn't have to be an actual server just one of the devices in server mode.
American Airlines way back had "more room" seats which were only slightly more expensive. I loved it and became loyal. But then they stopped. I guess not a lot of people wanted to pay the few bucks.
I work for a password manager that has had teams for a while. We have an encryption key per record with fast search. An open source command line SDK and Java desktop client which is great for linux. A great Android app with autofill, material design UI (more to come), which has been in the Google Play store since day 1, etc.
I'm obviously biased especially about the Android client :) but IMHO great iOS (and SDK), Android, Web Vault, browser plugins, Windows Phone, Surface, etc.
I worked in a call center where people where simultaneously using a phone and keyboard number pad accurately and not even noticing. Subtle differences between the two but still interesting.
SD cards are not popular in the US. Googler's also thought they were no longer popular. Mudge pointed out that outside of the US (emerging markets, Europe, etc) they are an essential feature.
IMHO most of the success was due to being featured. Being featured was mainly due to having contacts at Apple and Google. Having contacts is out of reach for most developers. There are only so many developers Apple and Google can have a relationship with and there are only so many apps that can be featured.
If you don't mind sharing which 3rd party stores do you have success with? I have tried Amazon with pretty much no success so I've assumed if they can't do it no one can.