After the initial phone call with the recruiter, I was given a task to do at home. The task was pretty average, I wouldn't say it's easy or hard, after I submitted the task I received a phone call and the person said that the task didn't meet the company's standards. I didn't get any additional feedback, they just said that the features didn't work, I have tested the app before submitting it and I made sure it worked, so I don't even know if they looked at it. I would suggest any company that makes a task like this a part of their recruiting process to at least make the time to write some feedback about the task, it's the minimum amount of respect you can give to the people that are applying to your company. The good side is that I did get a response pretty quickly and the task was well designed for showing skills as well as previous knowledge.