Your phone is a fully functional computer that fits in your pocket, but you probably don’t want to write anything on it longer than a quick email without a real keyboard. Zagg’s folding keyboard connects to any smartphone or tablet over Bluetooth, includes a stand to prop it up, and can fold down to fit into just about any bag. Get it for $15 with promo code KINJATAB5, and you’ll be the envy of the economy section of your next flight.