You knew it was just a matter of time. So far, your smartphone has been able to do pretty much anything you ask of it — except tell you when you've had one too many to get behind the wheel. Thanks to the Breathometer ($20 and up), now you can. This keychain-friendly device plugs into the headphone port of your iPhone or Android device, and interacts with an app to give you an accurate measurement of your BAC. Shipments start this July.
You could carry around a huge array of stomp pedals from show to show, or you could carry one iStomp ($150). This simple box works just like a traditional stompbox, only the effects it provides come from your iPhone or iPad. Simply download and select the pedal you want from the Stomp Shop, then load it onto the iStomp — since you actually load it onto the pedal, you don't need to keep your device hooked up, and with true stereo inputs and outputs and four control knobs, you can get just the sound you're looking for. Use one by itself or string multiple boxes together for truly crazy effects.
Say hello to your iPhone's new best friend. The Mophie Juice Pack Helium ($80) doesn't just protect your iPhone 5 — it helps keep it charged, too. Thanks to an advanced 1500mAh, the Helium is the thinnest Juice Pack yet, coming in at 13% thinner than even prior Air models. Standard features like LED battery level indicators and a micro-USB charging port are carried over, as are battery pack benefits like up to six additional hours of talk time, six additional hours of browsing via LTE, and up to 30 extra hours of audio playback. Available in dark metallic and silver colorways.