How the Larklife Wristband Could Turn Us All Into Quantified-Selfers

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gradually depleted. Impulses that crop up after the fund is empty are almost literally irresistible.

But there is one way to override an impulse even after your willpower reserves are gone, and that’s through the power of habit—things you do automatically because you’ve always done them. “You would never say ‘I’m really tired, I think I’ll skip brushing my teeth tonight,’ because that’s a habit,” Hu explains.

So controlling unhealthy impulses boils down to forming countervailing habits. And in Hu’s view, “Building the right habits is all about baby steps. So every part of our product is about building great habits and coaching you on how to do it in the easiest way possible.”

Say the Larklife wristband detects that you’ve walked 1,000 steps since getting up this morning. The LEDs light up, a push notification pops up on your phone, and a gold star appears on the app’s home screen. It may sound trivial, but “In the moment, that little reward is important because it propels your momentum forward,” Hu says.

An expensive gadget like a sports watch or a digital pedometer might be useful to a hyper-athlete who’s already motivated to exercise, but the average person just needs help getting into a habit, she says. “The way we do it is through baby steps, positive reinforcement, and keeping people on their momentum.”

The Larklife wristand communicates via low-power Bluetooth with an iPhone; a custom app delivers behavior-change hints.

The Larklife wristand communicates via low-power Bluetooth with an iPhone; a custom app delivers behavior-change hints.

While the flashing LEDs on the wristband act as one sort of reward, the more substantive stuff shows up on the iPhone screen, which essentially acts as the wristband’s remote display. (The same thing is happening in other areas such as home automation—witness the Nest smart thermostat, which comes with an iOS app that lets users adjust the temperature of their home remotely and see graphs of energy savings.)

In Lark’s case, the marriage between wearable device and smartphone is only possible thanks to the emergence of BTLE, which stands for Bluetooth Low Energy. A feature of the latest version of the Bluetooth standard, it allows devices to stay in touch wirelessly while consuming a tiny fraction of the power needed by traditional Bluetooth gadgets.

This helps Lark—which has raised about $4.9 million in venture backing from Asset Management Company and CrunchFund—get around the age-old sync problem, the scourge of every mobile gadget since the Palm Pilot. With the Nike+ Fuel Band, and even with the Lark Pro, owners must sync data to their phones manually. Most people go a couple of days between syncs, Hu says, which means the information in the app is always a little bit out of date.

“Behavior change doesn’t happen in the past, it happens in the present,” Hu says. “BTLE allows for constant connectivity, which allows for much more real-time feedback.”

It also allows the company to push software updates to the wristband’s sensor core automatically. “The beauty of the mobile-app and hardware-device combination is that it can continually evolve as a product, so you can improve on the experience,” Hu says.

But if the only sensor inside the Larklife wristband is the accelerometer, where does food come into the picture? As it turns out, reinforcing healthy eating habits is a little trickier than encouraging people to be more physically active. Users have the option of logging their meals manually inside the app, but the app isn’t meant to act as a calorie counter. Instead, wearers of the wristband are encouraged to tap the side button whenever they have a healthy meal or snack.

That simple act gets recorded and duly reinforced. “Just knowing the times of day when you eat and the number of times each day that you eat allows us to do a lot of coaching around better diet habits,” Hu says.

The company takes the positive-reinforcement model to an extreme, trusting that good behavior—if rewarded often enough—will crowd out bad behavior. “A lot of the time what causes people stop using diet-tracking systems is the guilt—‘Oh, I have to log the cheesecake,’” Hu says. “What we try to do is motivate you to eat more healthy things, thereby squeezing out the unhealthy things.”

So far, Lark has tested Larklife only on its own employees and a small group of beta users, so the company doesn’t have much data on whether Hu’s behavior-change philosophy really helps to improve nutrition, promote fitness, and reduce stress. But the same principles are at work in the Lark Pro sleep coaching system, which has tens of thousands of users and was developed in cooperation with experts such as Cheri Mah, a Stanford sleep researcher who often advises NBA, NFL, and NHL athletes on improving performance through sleep.

And when it comes to snoozing, the company has loads of positive data. An analysis of its sleep database (which Hu says is the world’s largest) showed that 73 percent of insomniacs got more sleep after using Lark Pro for a month.

“The people who stand behind us are the world’s top experts in these fields, and they have dedicated their live to figuring out how you apply these scientific methodologies to improving people’s lives,” Hu says. “Our job has been to translate that into a user experience that is simple, joyful, and meaningful.”

Whether consumers will agree—and, crucially, whether Apple Stores will stock the Larklife alongside the Lark Pro—are unanswered questions. But $149 doesn’t seem like a lot to pay for some friendly help losing weight, getting fit, and sleeping better, while at the same time making a fashion statement.

And ultimately, Hu says she sees Lark not has a hardware maker but as a “lifestyle” company, helping people to improve their health and performance through a variety of cloud and mobile services—whether or not Lark is the company selling them the associated hardware. “We are going to put this out there and see how people really use it, and where they need more help, and we’re going to continually innovate to do that.”

Here’s a short video from Lark about the Larklife system.

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The Author

Wade Roush is a contributing editor at Xconomy.

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  • jimmy

    If you think the fuelband is complicated, you probably should not be a technology reviewer. It’s basically a laziness meter and motivates me to move more. It costs the same as the larklife and looks much better.

    • http://twitter.com/TonyCaselli Tony Caselli

      I agree, neither is really complicated. However, the Larklife does a good bit more than the Fuelband, which is what ultimately prompted me to get it instead. I do like the small, sleek nature of the Fuelband, but the Larklife is actually a lot more comfortable to wear than I expected! I’m enjoying it a lot, I wish it had a watch, though! :)

  • Dan

    I love tech. I hate diet, exercise, and complication. I love simplicity. I’m always looking for and suggesting a better way of doing things, with less steps, and more automation. Why? I’m lazy. No really I have Narcolepsy and it does not in any way help my life to have to remember to do steps 1-5. I’m between the Lark and the Up. The main thing for me is tracking my very random sleep patterns in real time and getting that feedback so that I may possibly get better control of my sleep patterns. Totally think the Lark for that, especially since they key people behind it’s development are the Standford Sleep Specialist. 2 day battery life sucks though and its about 10 with the Up. I just don’t know. The other big difference between the Larklife and Lark Pro is in the app it’s self. I could really benefit from the extra sleep tracking features of the Pro app in the Life app. I don’t know.