Trebel is a free Android app developed by Dialog Factory BV that falls under the lifestyle category, specifically health and fitness. The app aims to make you aware that your behavior and mood affect others, and vice versa. It encourages you to take that extra step by surprising yourself and others.

The app is straightforward to use. Trebel sends you a notification asking if you want to chat for a minute. It asks you fun questions about your day, motivates you, and makes you think. You can say no if you're busy. At the end of the week, you get insights into your mood and why you feel that way.

Trebel guarantees your privacy by storing your data on your device. The information you provide is anonymous and cannot be traced back to you. The only data available is the overall results of the company and teams. Your data is stored securely on Dutch servers.

In conclusion, Trebel is a simple app that can improve your mood and make you feel better about yourself.