I've downloaded the wave.apk app file but Android says "Can't open file".

OceanMD Support

Edited January 25, 2018 23:28

Some versions of Android won't launch an APK file from the Downloads app or straight from the browser downloads.
Assuming the file looks valid (i.e. more than 1MB in size), you should be able to install it by opening the file from the "Downloads" app on your tablet (or the "My Files" app if you are using a Samsung tablet):

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