Texting works out your thumbs, sure, but how about your whole freakin' arm, bro? The ToneFoneis designed for a whole bicep workout. Wanna check Instagram? Bust out a few reps, dude. Selfie time? That's gonna be the healthiest selfie EVER.
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The ToneFone fits your iPhone 5 or 5S and comes in two weights, 1 kilogram or 1.5 kilograms, which translates to about 2.2 or 3.3 pounds here in America. The case is made from solid steel wrapped in white rubber, with gold and gray versions on the way (presumably to match your new iPhone 5S). The one drawback? You better not drop it, or you may put a hole in your floor. The ToneFone sold so well in its initial release that every unit is gone, so you'll have to jump now to get in on the next shipment coming in April. It retails for about $37, protein shake not included.