Another week is upon us, and that means it's time to check out the state of the Google Play Store. Your phone is only a shadow of itself without the best apps, so it's a good thing we're here to save the day. Just click on the app name to pull up the Google Play Store so you can try things out for yourself.
Mobile networks are more robust than they used to be, but capped data plans are also considerably more common. If you need a WiFi connection on the go, it's not always easy to find one. That's where the OpenSignal WiFiMapper app comes into play. You can probably guess what it does -- WiFiMapper shows you nearby WiFi hotspots and tell you whether or not you'll be able to access them.
OpenSignal gets its vast location data on WiFi access points from users of the app, and this collection happens automatically in the background. If you're not cool with that, no problem. You can open the settings and disable automatic collection of AP locations. However, that's the only setting in the app. Everything else takes place in the main UI.
At the top of the screen is a map that shows your location as well as the approximate location of the access points your phone can see. Gray icons are private and green ones are public. Less common are the paid access points, which are pink. Tapping on any of the icons lets you open the detail page on the AP (or scrolling down below the map). Depending on where you are, there might not be any data about a network. However, most public spaces I've checked have some indexed networks.
The app can tell you if a network is run by a business, if it needs a password, and if it's completely private. For business networks, the app ties in with FourSquare to show user comments. There are also comments within the OpenSignal system related specifically to the WiFi (i.e. whether or not it's usable).
If a network doesn't have any details listed, you can fill in the details yourself (requires a Google login). The app also keeps a log of the networks you've connected to in the MY History section so you can go back and add availability information to them. Again, this is optional. You can turn off the background canning and clear your history.
WiFiMapper has a material UI and performance seems good. I haven't seen any detectable battery drain from letting it save AP locations. It's a handy tool to have around if you're watching your mobile data closely.