Mavencare interview questions

I have applied on Indeed advertisement. I got an email from senior iOS developer. Manager and iOS developer took 30 minutes interview of technical questions and general questions. After completing that round they invited me for coding challenge round for 2 hours. Manager, iOS developer, Android Developer and NodeJS developer were there. They gave me one screen and ask to design, jsonparsing, n/w call, tableview and many other technical questions related to iOS. I thought I would be selected because my interview went really well and I answered everything correctly with perfect views. They rejected me without any reason after 5 days I got rejection email.

Interviewed directly with the hiring manager, don't think there was an HR department in place at the time. The hiring manager asked me to come in on a Saturday, which I found odd, but he was late to the interview as well.