Lumu Power Light Meter
As long as iPhones have Lightning connectors — probably for a good long while — the Lumu Power Light Meter will continue improving your photographs. This durable, compact device made of stainless steel and polycarbonate Lexan diffusers functions simultaneously as a light, exposure, flash, and color temperature meter for your device using a true color sensor on its flat side and a fast silicone photo diode sensor beneath the bubble. Plug it in with the desired side facing your subject and Lumu’s accompanying app automatically opens the correct measuring mode. Then, snap away.
Hit up Kickstarter for details – $200