CoffeeGenie: Your genie in the coffee maze

I was doing a lot of experiments with brewing coffee and overwhelmed by so many variables and the number of possible combinations. So, I made this app to help myself and others who are in the same journey in search of perfect coffee. Much effort has been given to make logging as painless as possible. Then, while logging, for each parameter, the app will hint which value gave the best rating in the past. This helps heuristic search for best parameter combination. The app gives you a lot of charts and tables. There is even a chart where you can customize series and x-axis. You can even see something like a rating vs grind level curve for each bean. Your logs are automatically synchronized across your devices. Inventory your machines and beans easily as well. It has a lot of features. Let me know what you think!