Hi, friend we have made our Grocerykart app opensource, so that new e-commerce startups can beinfit fron this and easily make there app using Firebase. All it needs is little tweaking according to your needs and you can get your e-commerce app for absolutely free as the back-end we used (Firebase) is also free upto 1GB storage and 50k download operations.
If you want to request some feature feel free to comment. I hope e-commerce startups will love it.
Music Player (Fabulous)