If you're not looking for a native app, you may want to try a responsive mobile template addon or paid themes. If you need a native app and would like to reuse APIs from your prestashop store, you will have to create an access to Prestashop REST webservices
To test if you have properly configured your access to the web service, go to the page http://mypasskey@mystore.com/api/, where "mypasskey" is replaced by your key.
