It's in the android section on the download page. You can verify it's safe using pgp. If you don't know how to verify a file using a pgp signature I explained how to here. If you read the whole thread it should answer any questions you have.

This is the electrum wallet download page.

https://electrum.org/#download

This is the latest android version's direct download link.

https://download.electrum.org/2.8.2/Electrum-2.8.2.0.apk

This is its pgp signature which you can use to verify it's safe.

https://download.electrum.org/2.8.2/electrum-2.8.2.dmg.asc