There's something quite special that happens when we reflect on what we've done. Well, two things, actually. One is that we gain a better understanding of what we've done or learned. The other is that our self-efficacy improves -- that is, our belief in our own abilities.

iOS: We were fans of Moment when it launched a couple of years ago, but one problem with the app was how it could only track general iPhone usage. Now, you can really zoom in on your usage with a new app tracker.

Sleep is as important to health as diet and exercise and, thanks to new technology, tracking sleep is now routine in monitoring overall well-being. But are the devices used to do this actually useful, or have we simply found a more sophisticated way to clock watch?

The rise of wearable fitness technology is something of a paradox. The surge in popularity of devices that monitor the amount of exercise you do suggest more people than ever are interested in maintaining regular fitness regimes. Just witness the success of the company behind fitness tracking bracelet Fitbit, which investors have just deemed worth $US4.1bn after it floated on the stock market. Yet this comes at a time when physical inactivity has reached levels of global pandemic proportion.

Apple announced numerous products yesterday (and upped the prices on others), but ResearchKit, the company's new medical research and health platform, is clearly the technology with the most potential to actually improve people's lives. Services like it are already at work around the globe, helping doctors and patients manage symptoms and improve health. Here's why it's important, and how it could actually change health care for the better.

In a recent article for the New Yorker, David Sedaris describes his loving relationship with his Fitbit and how it motivates him throughout the day. So, we want to know, do you feel step shame? Do those step counts actually motivate you to leave the house and walk?

iOS: Tracking fitness measures such as distance run, weights and even sleep is great, but unless you really visualise that data, it's pretty useless. Datalove provides those visualisations so you can really see your progress.

Dear Lifehacker, In December, I decided to import a FitBit Force from the US, via a mail forwarding service. Of course, FitBit have now issued a recall, and I received an email from the US product safety commission to return the item. I'm concerned that since the item is meant to be returned, FitBit may stop supporting it (or not put in place new updates). So is it worth sending it back to the US, or should I just continue to use it? And if I do send it back, what other fitness tracker is as good as my beloved Force?

I've previously looked at the ups and downs of tracking everything in my life , finding that the data helps provide a little guidance but is certainly nothing to live by. What I couldn't tell, however, is how accurate that data actually was. Rachel Feltman, writer for Quartz, decided to wear four fitness trackers at once to find out.