If you buy a Fitbit, Jawbone Up, or one of the other fitness sensors out there, you're committing to a single software ecosystem. That can be a problem if you want to use your hardware with third-party apps. Plenty of Android users know the pain of being unable to wirelessly sync a Fitbit with most Android devices. The Angel fitness and health sensor is an attempt to build a completely open device that app developers can plug into and create new experiences for users. After launching and Indiegogo campaign on September 16th, Angel has now passed the $100,000 fixed funding goal with almost 2 weeks to spare.

Angel is a slim wristband like other fitness sensors, but the creators claim it will be able to gather substantially more data. It will have a motion sensor for tracking steps and other activities, a heart rate monitor, a blood oxygen sensor, and a temperature sensor. All the data will be collected in raw form instead of being obfuscated by an arbitrary rating or numbering system.


Developers on both Android and iOS will be able to take advantage of the open APIs to create apps that utilize the Angel's data and real time logging. Many popular fitness apps could conceivably be updated to work with the Angel as well. The device will come with a single "Foundation" app that displays all the data gathered by the band, but it's not clear if it will do anything else, or if the designers will rely on third-parties to go beyond the basics.


Keep in mind the Angel will work over Bluetooth 4.0 LE, so only Android devices that support that standard will be compatible. The company is expecting to send the Angel out to backers by April 2014. If you want in, the $135 tier gets you one wristband.


Ryan Whitwam
Ryan is a tech/science writer, skeptic, lover of all things electronic, and Android fan. In his spare time he reads golden-age sci-fi and sleeps, but rarely at the same time. His wife tolerates him as few would.

He's the author of a sci-fi novel called The Crooked City, which is available on Amazon and Google Play.

  • http://www.vinsonimages.com yamaha83

    kind of like the amiigo.... looks a little cooler though IMO...

    • MrGalione973

      one thing i dont think, is that the amiigo, doesn't do the full raw data collection. but i am a fan of both this and the amiigo.

      • Wayne Randall

        Yea, if you could go ahead, and throw some extra commas, in your sentence. That'd be great

        • MrGalione973

          Don't mind if I do, , , , , , , hope this helps.

          • Wayne Randall

            Much better, thank you.

      • JLM

        I thought the same thing too. I'm still waiting for my Amiigo.

      • Cody Curry

        Amiigo is more for using data to determine what your body is doing and then using that to guess calorie burn. Which is cool, since entering workouts manually is a huge pain. But it's lacking other sensors.

  • jason biggs

    Look bery good, will get 2 or tree.how many gigahertz the contraption acquires ?

  • Indifox

    See...it looks great and i'd want it and all. but 135 dollars? no ty

    • Steve Freeman

      If the fitness apps I already use are updated to support it, I may get this. Otherwise, I kinda agree with you.

  • Jesse

    How come these guys are the only guys who can do pulse oxygen sensors on the wrist? Everyone else has to use a finger. Maybe they have a super bright LED that shines right through your body!

    • AmicusBrief

      Pulse oximetery is not limited to fingers; ears, noses, and feet are often used as alternative sites.

    • Elijah

      Not the only guys... this was what made the Basis stand out. Though, having owned and returned 4 Basis bands, I am not very confident in the pulse-oximetry-based heart rate monitoring from the wrist. At least with the Basis, the claim was that it is good at reading your heart rate throughout the day, but it was unable to get accurate readings when you're moving too much; and that's exactly what I found, that the heart rate readings cut out when you were being active, which is exactly when I want my heart rate readings. I'm now backing the Kreyos Meteor, which does not attempt to tackle pulse-oximetry heart rate monitoring, but rather leaves that function to a separate device, like the much more reliable chest strap heart rate monitors, and then simply pulls the data via a wireless ANT+ connection. Maybe these guys have got the pulse-oximeter down... but I would wait until the initial reviews come in before buying one.

  • DoubleP90

    Finally a wereable gadget that is useful, smartwatches should have this, i don't need all that stupid stuff like reading email or webpages from a smartwatch, i can do that already on my phone, i want a smartwatch that has features like this device

    • Elijah

      Well... that's kinda the definition of a smart-watch though: a wrist-worn device that can access data and functionality that normal watches don't have. It's the same relationship that a smartphone has to a phone. These activity trackers have, for the most part, been a separate deal. Though, I believe you are correct that more smartwatches are going to include activity tracking. For instance, I am backing the Kreyos Meteor which does exactly that.

  • jason ritson

    i'm waiting for the Fitbit Force

    • Nugen

      the Fitbit Force does not have a heart rate monitor so it can only give you an "approximate" amount of calories burned...

  • tay

    tried it and it works(although some bugs still exist) but prefer the traditional way..
    btw the developer is only 17 yrs old... Damn :O

    • tay

      oh shit wrong article..

  • Colin Richardson

    Now what you need to do is make this into a "Watch Strap".. so you dont need to wear a Pebble AND this. Just wear the one, and do both :D