The app allows people to find parking spaces anywhere in the world and pay for parking using newly created BCH/SLP and ERC20 PARK tokens.
As Theb said, the project looks very polished, beautiful website and app.
My main suggestion is to remove BCH support is and to add BTC support.
Many people around the world, and specially in this forum, consider BCH a scam and a fraud (supported by individuals such as Faketoshi), and adding support to this kind of coin will reduce the credibility of your project.
Why didn't you add BTC support? An ERC-20 token is way more expensive than a BTC transfer, and bitcoin is more widely accepted as a payment method. Nobody will criticize you for accepting BTC, but people will for accepting BCH and not supporting BTC.
By adding only BCH support you are making a party, on the loser's side, in an old drama, with no possibility of any benefit.