At this time, it's not possible to directly deposit a cryptocurrency other than bitcoin into Abra. However, we are working on making this a feature in the future.
You can send bitcoin to your Abra wallet by tapping “Send or receive” in the app, then selecting “Bitcoin”. You will see your Abra wallet address, which you can scan as a QR code, or copy the address as text. Use this address to send your existing bitcoin into Abra.
Some customers sell their other cryptocurrencies for bitcoin so they can bring it all under one app with Abra. To do this, these customers will use an exchange or a conversion service such as ShapeShift or Changelly to get the bitcoin into Abra.