Lots of homeowners own alarm systems, but it’s more rare to see them in rented apartments; who, after all, is going to go through the trouble of wiring an entire system on a property that doesn’t belong to them? That doesn’t mean your stuff is any less valuable or your dwelling less prone to burglary, so we’re happy to see a product like Korner. It’s a cheap and super simple alarm system that anyone can install in a couple of minutes. It consists of small motion-detecting tags that attach to the corner of your windows, and a wireless dongle that you plug into the ethernet port on your router. If one of the tags detects movement that it associates with the window being opened, it’ll send a signal to the dongle, which will then notify you on your smartphone. You can then either call the police, or contact a neighbour to check in on your place. While that’s all happening, the key fob will emit a high-pitched audio alarm to deter the intruder from sticking around, stealing your belongings.
You can pair up to 15 corner tags, and an $89 pledge will get you a set with three of these, and one fob. Each tag is easily removable and reusable, making it dead simple to move and take the system with you.