Step 1: Download the .deb hack file from the link above.
Step 2: Copy the file over to your iDevice using any of the file managers mentioned above or skip this step if you're downloading from your iDevice.
Step 3: Using iFile or Filza, browse to where you saved the downloaded file and tap on it.
Step 4: Once you tap on the file, you will then need to press on 'Installer' or 'Install' from the options on your screen.
Step 5: Let iFile / Filza finish the cheat installation.
Step 6: Now you can open Brave Frontier and the In-Game Mod Menu's button will appear. Tap on it to see the cheats. Also, please check the Settings App (look for the Jed icon!) for additional options including button placement, visibility and other settings to configure to your liking.