At the start of this year I dropped well below my desired weight due to being in South America. After a few months of slowing climbing back up to something more appropriate I finished off the year at 68kg.

I set a target of taking 10'000 steps a day, everyday of the year. From the numbers I didn't reach anywhere near close to that. Most of my big step days were either in South America or San Francisco when I was touristing. My highest step count day was 28 January 2015 at 31,490 steps—21km. The second highest was just a few steps less, a week earlier in Cusco, Peru. That day ended with myself being wheeled to a medical centre after having passed out from exhaustion.

2015 saw me do a lot of skiing, some of which I tracked with my phone. I broke my maximum speed record one afternoon in Telluride, CO, clocking in at a little over 104 kilometres per hour. I tracked part of a total of 13 days out of 19 I skied in 2015. During those days I skied over 40669.4 vertical metres, to a total ski distance of 241.8 km.

* I track steps with the iPhone's built in pedometer. As a consequence, days when I leave my phone at home (often in South America) or on a table (most days when I worked from home) would not be counted. I also seem to have lost around 50 days worth of data during the year (this is most likely caused by running pre-release builds of iOS on my phone and the loss of a day when flying across the international date line).

** For skiing statistics I used Ski Tracks app for iPhone. While in Telluride I ran it for most of the day almost every day. I missed two days. While skiing in Australia I often chose not to run it. Distance is calculated as only downward vertical, the app attempts to determine when you are going up chair lifts and exclude that from calculations.

Music is a massive part of my life. Every day I listen music for at least an hour, sometimes for countless hours. While I'm not writing up a full analysis of my listening habits for 2015, here are a few numbers of note.

I decided not to write Music of 2015 post in part because I listened to music on so many different services and devices it would be an untenable task to merge the play counts. 2015 really was the year for complicated music listening.

I continued to heavily use Pandora for all of the year (as I have since 2012) and I listened to over 988 unique tracks on my top station alone this year. Pandora always has been my best way of discovering new artists.

In June, I signed up for Apple Music and have very much enjoyed having (almost) all of the iTunes store library at my fingertips. While I've had a few problems with the clients for the service, the idea of a seamless merging of my iTunes library with the worlds iTunes library has been great. Thanks to playlists like Eytan Schulman's WWDC 2015, I was able to discover songs that defined that great week for me.

On that note, my top song of 2015 was 'Dreaming' by Small Pools. I first heard it at WWDC and have played it well over 150 time's in just five months. My second favourite song of the year was 'New Years Day' by Pentatonix, which garnered over 130 plays in just three short months.

Interestingly, Radical Face, doesn't feature very high for any of their songs in play count. However, when ranked cumulative for all songs they do very well. I really fell in love with their sound this year, and I could just listen to all of their albums on loops for days (and maybe I have).

* These values were calculated in November of 2015 and only account for new songs added to iTunes. Old songs, added before January 1, 2015 are not included in these calculations. This also doesn't include songs from Pandora, YouTube, Spotify, and terrestrial radio. However, Spotify was used so sparingly that its number would have little influence here.

2015 was definitely my year (so far) of travel. I visited five countries, a small figure except that they were across three continents. New Years Eve 2015 was celebrated locked inside my hostel in a small town way up high in Bolivia, Potosí. After Bolivia I travelled to Peru, then up to the United States before coming back to Sydney.

A couple of months later I travelled to Wellington, New Zealand, with my family. We spent four days there, in both the city itself and the surrounding areas. Wellington is a great city that I would love to go back to one day.

In June I then travelled, by myself, to San Francisco for Apple's World Wide Developer's Conference. I've written more about that trip below.

During the year I also went skiing a handful of times in Telluride, Colorado, and Thredbo, NSW. I also, very briefly, visited some friends at the Australian National University in Canberra on the way down to the snow one time. I definitely need to visit more places in Australia this year, and get to both Canberra and Melbourne to see friends at universities there.

Most of my day-to-day travel was done using busses. I catch a bus to-and-from university each day and when combined with a tram, to-and-from work. I used UberX a considerable amount in 2015 than in the years prior, however I still didn't use it that often. Most of the 138.1 Km of trips I took where in San Francisco, split between my two visits.

Thanks to buying a new camera at the end of 2014, I took a lot more photos during the year. I only took an 8GB SD card to South America with me, and thus calculated a maximum of 30 photos a day. Most of my photos are from my three trips (above) but some are still from around Sydney, or other shorter trips during the year.

Thanks to always having my iPhone on me, I also took over fourteen-hundred photos on it during the year.