For example, another useful application would be "your personal prediction tracker", where you enter various short-term predictions, your confidence interval, and then enter the actual result. You can classify each prediction and then see if you are over- or under-confident in certain areas. (I remember seeing a website that does something similar, but can't find it now.)

You're probably thinking of PredictionBook.

Thanks! I've been wanting an app for this bad enough that I was thinking about writing it myself.

Other than data export, which I see that you're working on, it's pretty close to what I had in mind. :)

I've been using this app for a while now. While I really like the idea I haven't included it into the list of my favorite useful apps, because there are some points that I find confusing:

1. The images of the diagrams on top suggest that clicking on them opens a corresponding diagram. That's not the case and thus counter-intuitive. It would be better to make four buttons: Intervals, Tracks, Invteral Diagram and Tracks Diagram.
2. The Interval Diagram should be a global diagram that displays all interval tracks above each other in different color (which the user can select by long pressing on the specific activity). (I haven't used tracks, so I won't comment on them.)
3. Pressing on the menu button on my Android phone leads to no response. At least a help file should be implemented.
4. The pinch zoom function in the diagram screen is counter-intuitive. Usually you pinch to zoom out. There's a reason for that convention: When pinching on a map the distance of the points on the map on which your fingers are placed on remains constant while pinching. Those points on the map remain "glued" to your fingers, which is pretty intuitive.

Anyway, I really appreciate your efforts at creating this app! :)

If you ever decide to make a paid version, a price between 0.99$ and 1.99$ would be appropriate for such a simple app. You get superb Android apps (for which big teams of programmers worked for months) for as little prices as 4.99$.

Further idea: A feature for computing correlations between the different activities would be great. What might make most sense is to take the seconds, minutes or hours per day or week an activity is happening as discrete random variable. For example: X: {days from the beginning of any activity until now} -> {0,...,1440} X(d) = minutes of reading fiction on that day

Having separate graphs for those variables would be pretty useful, too.

Thanks! I was looking for something like this after reading the luminosity sequence again. Haven't found any on the android market.

Feature requests:

• You could make it respond to specific intents to create (and let others create) separately-installed plugins (e.g. a plugin with location permission to automatically track where you are, one with internet permission to track various karma etc.).
• Tracking ordinal values (e.g. happy, anxious, happy+anxious...)
• A widget
• Data export
• More analytical tools, perhaps something to compare tracks/events.

You could possibly even monetize this by keeping the app free and offering an awesome analytic service online (I'd pay $10 for 10 instances of auto-generated full analysis report).

And while we are on topic of mobile apps, what other applications would you like to see made?

What I'd really like is a mobile-friendly version of LW website (http://m.lesswrong.com), or perhaps a dedicated mobile LessWrong app (though I'd prefer the former.) The current layout of LW doesn't work well on mobile devices.

A good example of mobile redesign is Engadget: regular site vs mobile site.

Just gave it a try. It looks pretty good, but it needs a way to edit and delete events and track values easily, like a table display.

Also, you might want to add your app to AppsLib; otherwise, a lot of people without access to the Market might miss it.