bike computer

Hello I want to give a gift to my niece who likes biking. She is not a "real" biker but still enjoys riding in neighborhood and explore new tracks. Hence the main requirement would be mapping and navigation somewhere around her house or vicinity. I checked Amazon and get confused of variety...

I've been working on the application for about 3 months, thanks to your feedback to find the deficiencies and errors, re-compile the places I need to improve and now put on GooglePlay and share. There are points that need to be added. such as cadence and pulse support. I'll take care of them in...