It is possible to play Let's Fish on a mobile device with the same account created on Facebook, or Lets-fish.com

After downloading the app on your device and entering the game, please go to the options and choose the "log out" option. You will see a log-in screen where you can choose to continue the game on your Facebook account - you will have to pick the correct account from the list.

For playing with your lets-fish.com account, please pick the option available below the Facebook button. You will have to choose which world you would like to continue on, and after that, you will log in using the same data as you use on lets-fish.com