The Good: The Presence app gives iOS users a free way to monitor their homes. The Bad: Presence isn't compatible with Android devices, it doesn't have an IFTTT channel, and it's constantly trying to sell you its optional fee-based cloud storage upgrades and third-party products. The Bottom Line: The free Presence app is a great way to experiment with home security -- just don't let its prominently-featured online store trick you into spending hundreds on accessories. \tPeople Power knows that you probably have a nice assortment of outdated (but still decently functional) iOS devices at home. And if they're just taking up space anyway, you might as well find a clever way to repurpose them. \tSo it developed Presence, an app designed to quickly convert your backup iPhone, iPad or iPod Touch into a quasi-security-camera. \tSimilar to the free \t , Presence gives you the chance to set a spare device as your stay-at-home "camera" and the newer device as your on-the-go access point. That way, you can view live streaming, receive email notifications and push alerts, set rules, and have a better overall idea of what's going on at home. Presence is a solid way to ease into DIY security, but Manything's IFTTT channel and comparatively streamlined interface has a slight edge. \t \t \tPresence works on iOS 6.1 or newer and is optimized for iPhone 5. Still, it will work on the iPhone 3GS and newer, iPad 2 and newer and iPod Touch 4G and 5G. I tried Presence out on an iPhone 5, an iPad 2 and a first-generation iPad Mini -- both as cameras and as on-the-go viewers. \tIt's similar to Manything in many ways -- here's a quick side-by-side comparison: \tPresence and Manything are both limited by the devices you use and the last OS you downloaded, including whether or not a flashlight is an included feature (if not, night vision won't work). That means that you'll have the same resolution, field of view and so on -- areas that can make or break traditional Wi-Fi camera comparisons that simply aren't applicable here.Still, the apps differ in a few key ways.Presence doesn't have an IFTTT channel, but it does offer in-app rules. These came preloaded in the app and duplicated whenever I added a new device. One rule says, "If I come home, then make my iPad disable motion detection."That rule sets up automatic Home and Away modes, a hands-free way to have the camera record motion-related security events when you're out of the house and stop when you return (so you aren't constantly triggering it yourself).