ZDNET reviews a product called Heat It, a smartphone-powered insect bite healer, a tiny dongle that fits onto your keychain. The product uses a smartphone app to heat up the end of the device to a maximum 124°F/51°C, then applies the heat to the bite. Each application takes less than 0.1% of your smartphone battery. The device is medically proven to work and has different modes for adults and children, a sensitive skin mode, and short, medium, and long application times. Despite the cost of the product being $40, ZDNET editor praises its effective bite relief and prevents any unnecessary side effects from bites becoming infected.