KS Spark core was working.... I put it in the draw for a few months and just dug it out as my new Photon's arrived. My older "Core" module just brings up a solid magenta led, tried resetting, and releasing the API to reclaim, removed app... probably time to forget this pipe dream and go back to the tried and proven USB arduino's :(

Great idea. Doesn't work. I get one digital write, then it disconnects. Have to start all over. Help page is 404. Waited 7 months for this! ! ? ? Very disappointed.

Got There (in the end)! I was so looking forward to this device, but was disappointed in its inability to connect using my Samsung Galaxy S3. Even more concerned that it appears not connect to 802.11n I have tried changing my router 54mbs and best compatibility to no avail. I would expect this to work out of the tin. I will now try the USB method. Joy at last!!! Have now connected using the USB method, so have upped the stars. I'm over my initial disappointment, and am ready to fire up my imagination :-) My router settings are back to normal: 2.4GHz Frequency , Auto Channel (current 11+7), and up to 300Mps.

I do have a spark account, but I can't log in with my account with this app. It says that my email address is invalid. My email address has a .us domain.

Connectivity not working well... My Nexus 5 and LG G2 cannot find Core at all no matter how i tried...But my Nexus 10 can find it, once it connects to Core, flash the code from web IDE, after a while, it disconnects from Core...Can anyone assist?????

Not a happy bunny Had a very quick response when wasn't working. Works great on a Nexus 7 and Galaxy S3. Looking forward to getting my ideas up and running.

I love spark, but this application is too limited There is too fee information about what is happening during the connection, and claiming process. I would like to have a log with all those operations, scrolling up right in the screen of the application.

Good after connection issues. Couldn't find core with my phone. Followed instructions and got connected to my network via usb. After that the phone interface worked great.

Problems installing on Galaxy Mega. This app never finishes installing. Really disappointed. Rebooted 3 times, and left it installing, 5 mins later nothing. Left it for 30 mins, finally this app installed. Connecting the Spark to my wifi network, also did NOT work using this app. I wasted 2 hours. In the end I had to connect via usb Serial and send the w command to setup wifi credentials. At least the documentation shows a work around when this app does not work. This App NEEDS improvements.

404 error and many others. The application requires that you be physically logged into the network you are trying to connect it to.. This is a totally unnecessary step. The device does not need to be on the same network as the phone, especially if the phone is not connected because it is providing a network via tethering. Allow the user to manually write in a network to connect to. The Application gave no warning that it could not connect using a Nexus5. I finally connected it uing a Galaxy Camera, Nexus 4 and Nexus 7. Give the user a notice if they are using a Wireless N capable device on a wireless N network with B/G backwards compatibility. Currently the device just refuses to connect and gives no warning message of any sort, just times out. The device is on a strong wifi connection but keeps getting random errors. I've done everything I can to get it a strong signal, but there are messages popping up continually. "We have encountered an error". "Status code:404/504" and many other errors. Because of the above, I've pretty much written the device off as being too unreliable to use in any project aside from "wow an LED lights up when I press this button". Good effort though.

Firmware update bug Not working very well.. The core start to update itself then goes blank, so I need to do the factory reset then everything happens again!

I use this app whenever I'm too lazy to use putty or if I want to quickly connect the core to wifi. Works great!

Not working with me My core rgb is breathing cyan but neither my Xperia z2 nor my iPhone 5s can find it, why is that ? I have also tried almost everything in your website!

Does not work on my phone This app keeps connecting and can never find the spark core on my phone. Totally disappointed.

Meh. Its...... average. No real idea if the connection is working or not. Just a blinking blue light and no knowledge of whether its working or not.

CM11 Unable to connect using my S3LTE running 4.4.2

Hate it Does not work, this app sucks

YOU NEED TO UPDATE THIS APP!!! The last update to this app was December 18th 2013.

It is very easy to use The ui are simple but very intuitive. And it is very easy to pair with the spark core.

Great simple interface Really really quick way of getting started. Nice way to interact with the Core.

Doesn't even connect Nexus 5, CM11, not working.

Simple but effective Great way to get started with the amazing Spark Core.

Worked out of the box! Worked as advertised. Going to have fun with this one

Great Easily connected my Spark Core quickly. Thanks Spark!

Easy to use Very happy with your products. Thanks

Install Particle.

Great app And great product too

Awesome Good App for a great device

Awesome Love my Spark!

Spark Really sparking...good connectivity

Very good

Love it

Works great

App works great! Was connected and talking to the device within seconds of it getting power.

Galaxy s3 fixed Great developer, fixed the galaxy s3 issue, got a personal email from the team!

I have waited for this for awhile b)

Works great It works great Its in clean style And dose all it need to do

Works perfectly

Awesome Awesomeness