AndroidDStretch is available on the Google Play Store.
See the Google
Play page for screen shots and description. See the
iOS page for more general
information and examples. Much of the iOS info applies to
Android. DStretch requires good color resolution. This is
not always the case for cameras on Android phones. I
recently updated my Android phone to an LG G5. It has two
cameras. One is a normal camera which takes good pictures
for DStretch. The other is a wide angle camera that takes
poor pictures for DStretch. My old Samsung Galaxy S4 took
poor pictures. My wife's S7 is the same. It seems
Samsung likes to smooth the colors and assumes no one will
notice. There are camera apps, Open Camera and DSLR Camera that
may improve the images. On the S7 you can set the camera
to "Pro" mode which saves the raw data which can then be
processed by an app like Snapseed. My tablet (Samsung
Galaxy Tab S2) has a great display, an OK camera (but no flash),
and is very fast at doing the enhancements.
Some images to play with. Download them to your device.