Saw a kickstarter ad for one of those elocks, which is unlocked by using a cell phone app.

What problem is this idea trying to solve? I've already got 25 other keys on the same key ring (not quite), relieving the burden of one key does not help.

So the idea is to pull out my phone, start the app, hit the unlock button, and wait for the crappy signal to carry? How is that any more convenient than reaching for a key which is hanging off my back pack? And what about when it's pouring down rain (don't use a case...gave up on them when my son destroyed a lifeproof)?

Gimmick.