Checkers Sixty60 app is the best food retail app in SA

The Checkers Sixty60 app is the best food retail app in SA. None of the other biggies Asap of PnP, or Woolies offer the function of replacements if the first choice of food is not in stock. The Sixty60 app responds fast on inputs as well. Their app is easy, intuitive and colourful, even sometimes funny. What can you do to improve? Give a 10 minute wait that I can add something I forgot. Invariable I remember something just as I completed the buy.