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Life & fun · June 17, 2012

HF

Hone for iPhone 4S - never lose your keys again

Hone is a Bluetooth low energy device for the iPhone 4S and new iPad that erases the annoyance of losing your keys - my partner (Louis Gerbarg) and I built it for ourselves, and then decided to put it on Kickstarter. It lasts for 6+ months on a CR2032 battery, has a 50 meter range, and we're making the whole thing in the USA - case, PCB, and component assembly. We've gotten lots of help and support from HN users (esp. Eric Migicovsky's Solid State Hardware talk, curtgeen's hardware design guide) and we'd love feedback now that we're launching.

Hone for iPhone 4S - never lose your keys again launched on June 17, 2012 with 29 votes, #63 of 409 launches that month and more than 75% of that year's launches. The site was not reachable when checked in September 2026.

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In plain words

Hone is a Bluetooth low energy tracking device that attaches to keys and connects to iPhone 4S or the new iPad to help users locate lost keys. The device has a 50-meter range and runs for over six months on a single CR2032 battery. Manufactured entirely in the USA, Hone was created by its makers for personal use before being made available to others.

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