Tipping is super easy in GlossGenius! Simply go to Settings > Business Info > Booking & Payment and set a default gratuity at 0%, 15%, 20%, or 25%
Then during checkout, when it's time for the client to sign, there will be a tipping area right above the signature box. The tip will be set at your selected default, with the other percentages available for the client to choose from, as well as an option for a "custom tip" if none of the percentages are just right for the client.
One they tap a tip amount, they simply sign and submit!