It may happen if the servers are down or if they are performing maintenance on their end when the Cash App does not work on iPhone. The number of people who sign up for Cash each month is almost 30 million. There may be times when people are unable to use this banking service. You don't have to worry if you're having trouble with transactions or if you're experiencing any other issues with this money transfer platform; we've got you covered! There are a number of steps you can take to fix any cash app crashing on iphone .