SunTanCity never works, which is a shame because it would be beneficial for customers. When I open it on my iPhone, the screen is always black. Without a functioning app, I have to use the website for online check-ins, which is inefficient - most of the time I have to tell the staff exactly what bed type and services (e.g., sunless tan color, hydration, etc.) I opted for online. It’s great that the check-in feature holds your place in line, but it doesn’t save any time when you have to explain to the customer service rep exactly what you want and already paid for online. Nonetheless, Sun Tan City is the best tanning salon I’ve experienced, so this review is by no means a reflection on its staff, equipment, or services!