Once I applied online, I was rejected a few days later. A few weeks after my rejection, I was invited to have a 15-minute call with iOS Team Lead. Unfortunately, I was provided with a call link for an absolutely different position, and it took 6 working days to get the correct one.
The short call was good and primarily focused on your experience and motivation. I guess they only talk with candidates who are not so good after the CV screening step, as otherwise, you'll directly receive a challenge. The next day, I was invited to take their coding challenge.
They promise to provide a detailed summary and explanation of the problems they found.
The challenge itself looks very simple on the surface but contains many corner cases. You will be required more than 4 hours to finish it properly to match with he Komoot hiring team expectations level. You won't be provided with specific expectations, so it is a total black box and luck to match their checkboxes.
In addition to the code, you are expected to provide a detailed summary of your decisions, problems, and open questions. This is a very important part, as your success will be mostly based on it.
I received my rejection five working days after submission, which is good. Unfortunately, I didn't see the thorough and detailed feedback they mentioned. There were only two sentences for the negative part. No one really puts effort into providing you with a good piece of feedback.
Overall, the amount of energy you put into the process doesn't match the outcome the Komoot hiring team provides you with. You can see all the same problems across interviews for years. They don't care.