Over about a year, I learned the programming language of iOS apps—Swift 5. My first draft was ‘AOK-Bonus’, a redesign of a current app. Working on an existing concept helped me to focus on learning the syntax and gaining some experience. Later on, for the next challenge I created a new idea, where I took my learnings from the past and took the complexity to a new level: working with databanks and network activities. And that is ‘CryptoWatch’.