Meet the CoreCap: a customizable bike computer that helps you get more out of your rides. It is designed to fit into the steerer tube of your bike. It is smart enough to turn on and start recording your rides automatically. Its mobile app lets you customize up to 5 preset screens to switch between them during your rides.
You get plenty of widgets to choose from, including clock, stopwatch, Strava Connect, Komoot, and heart rate. CoreCap can also provide you with turn by turn directions and notifications. It has a 1.3-inch display and lasts up to 80 hours on battery. This project is currently getting funded on Kickstarter.