My name is Jose and I've been interested in QS for more than 5 years. As I also love Java programming, I have written some apps to track some of my activities.
As I think that QS is most complete/easy/effective when no manual input of the tracked data is needed, I have written a fitness app that guides me during my workouts, and also allows recording external workouts. Similarly, I have created some sort of iTunes clone that tracks the albums I listen and suggests music.
However, the most part of the tracking is done in another application, a custom chatbot that lets me store all kinds of data. I think that the natural language interface is the most useful and flexible method of both storing and retrieving information. I record regularly information about my finances, movies, books, to-do lists, etc. I also use it as an agenda (birth dates, anniversaries, and so on). The initial idea was to convert data logging is an informal conversation with a friend, with some random element to make the conversation more fun. For instance, when you enter a movie, it sometimes asks you to score it, specify the genre, tells me the last time you saw it, etc. I specially love the way it presents the information in graphic format (pie charts, histograms, etc.)
I have not published these apps, but I would be happy to upload some screenshots or share them if anyone is interested. I would also love to receive feedback any feedback about any of these ideas and/or similar projects.
I have also been trying to find information about QS in Spanish, but I have not found much. Does anyone know about blogs/forum/websites for QS in Spanish?