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Developing a slot car timekeeper app, using a cardboard, mobile phone and web technologies only | by Paul Hackenberger | Axel Springer Tech | Medium
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![Developing a slot car timekeeper app, using a cardboard, mobile phone and web technologies only | by Paul Hackenberger | Axel Springer Tech | Medium Developing a slot car timekeeper app, using a cardboard, mobile phone and web technologies only | by Paul Hackenberger | Axel Springer Tech | Medium](https://miro.medium.com/v2/resize:fit:1400/1*jT8bPb9hc1PVWSQbIcW-IQ.jpeg)