Currently, there are two types of Airdrop.
To check if you are eligible, please visit the site and try connecting your ETH wallet.
NOTE: This is explained in the Metamask app for iOS.
Copy & Paste airdrop web URL
If you are eligible for Airdrop, you will see the available FUJI, and you can claim them.
You need a bit ETH for gas and wait for transaction to get FUJI.