1. Create a new API key
To create the key, go to bitfinex.com/api. During creation, select only the permissions you want your mobile app to have. For example, you could give the key read permission for orders but not write permission. This would allow your app to view orders, but not place new ones, increasing the safety of your account in the event of a compromised device.
Important: the Orders permission in Read mode is required
2. Scan the QR code
When the API key from step 1 has been created, a QR Code will be shown in your browser (only once). Now, using your app and your phone's camera, you can scan this QR Code to import the API key.
Load the Bitfinex mobile app on your phone or tablet and press the Lock icon.
You will be asked to Enter key manually or scan QR code. You can either type in the API key and API key secret from the previous step or press the QR code icon and use your mobile device's camera to scan the QR code. If you scan the QR code from the Bitfinex website, the API key and API key secret will be automatically entered into the fields for you.
Note: To scan the QR code, you must allow the Bitfinex app to access your camera.
Note: Be sure to record your API key and secret somewhere safe. It will not be shown again.