There are a lot of apps out there that pay lip service to security and privacy, but Signal was built from the ground up with the goal of letting people easily communicate without having to worry about being overheard. The Signal app is a complete phone and SMS client replacement (though it works just fine as a standalone app, too) for sending and receiving encrypted calls and messages. A recent update has greatly improved the app's look and feel, proving that security and usability don't have to be at odds. Droid App

Google Photos puts the search giant's powerful (and sometimes creepy) image magic into your phone. It can identify faces, even as they age over decades, as well as animals, places, or objects. You can also search for photos from specific dates or locations. The impressive built-in Assistant can detect clutter or even create collages or animations on its own. The app is rounded out with editing tools and unlimited cloud storage if you make some minor compromises on upload quality. Google Photos also extends to photo prints; you can digitize physical photos with the built-in Photo Scan or even order a custom photo book. The companion Google Lens app can even report back information related to your images or photos by scanning them.
GetJar’s clever draw is to offer premium apps to users for free to generate traffic, and then monetize that traffic with advertising dollars. App developers considering GetJar might be tempted by the virtual currency tie-ins, and the option to target new users with different kinds of promotions. Be warned, though, the submission process might take a while. Android App
This calorie counter and exercise tracker aims to help you lose weight the old-fashioned way—expending more calories than you take in. With its smart design and an extensive library of foods, it makes quickly logging the calories you take in and what you burn while exercising a snap. A barcode scanner makes it even easier to log that post-workout snack. This fitness app also plays nice with other such apps, so your data won't be tied up in just one place. MyFitnessPal won't give you a whole workout regimen, but it can make you more aware of your habits. PCMag has a full review of MyFitnessPal for the iPhone. Droid App
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