> On Sat, 5 Jan 2019, 05:27 Richard Stallman <rms@gnu.org wrote:


   > As I'm writing this, I note that there may also be a third way, which is to
   > use corporate deployments. Some companies have Ipads that are used in kiosk
   > mode to handle reservations at a restaurant for example. These applications
   > are obviously not available on the store, and I seem to recall someone
   > saying that they are not vetted by Apple in the same way normal
   > applications are. However, I know very little about this and someone who is
   > an Ipad developer could probably provide more detail.

I think if you install a certificate from someone who has written an
iPad which is not in the appstore, you can install it, on your own risk.
I think there is a app called popcorn which is for streaming videos and
which is not available  in the app shop, but can installed via the webpage
of the developer. So may this is the way Emacs could go.