What started as a project to help founder Andy Rawson find the drafts in his 100-year-old house turned into a Kickstarter campaign that raised nearly six times (and counting) its asking amount.

The IR-Blue works with iPhone and Android devices to create a live-view thermal imaging camera. The accessory uses a 64-zone non-contact infrared sensor to read the temperature of its surroundings. It then sends the information to IR-Blue’s free app via Bluetooth. 

IR-Blue originally asked for $20,000—selling fully assembled thermal imaging accessories for pledges of $175 or more. With 13 days left, IR-Blue has raised over $115,000. The estimated retail value for the thermal imaging smartphone accessory is $195—much cheaper than other thermal imaging cameras.

Watch the IR-Blue working with an iPhone below: