Shou: New screen recording app still in development but nonetheless fairly stable. Choose what resolution to record in, bitrate, audio mute/on, etc. Currently free on XDA, thus making it a strong competitor to SCR Pro.
: A classic among root recommendations. Allows you to put apps/services that run in the background and stop the phone from sleeping into "hibernation", thus gaining you precious extra battery life. The pro version allows you to hibernate apps and services and still receive notifications, thus getting all the pros and none of the cons of using this service.
: Simple way to make use of the thermometer/humidity sensor in your S4/Note III, although this app supports pressure information found in phones with barometers as well. Customizable widgets and measurement units, graphing, and data exports. Pro version provides slightly more accurate readings by taking into account the battery temperature.
/u/cryptoz, this app crowd sources pressure information from barometers that are found in some smartphones. The information is anonymous, and is sent to researchers and forecasters to help with forecasting models, and to better understand atmospheric conditions on the ground. Negligible impact on battery.
: Holo themed app by Mobeam. This app allows you to scan in any physical card with a barcode via the camera, and then beam that information via the IR proximity sensor on the front of the phone into any handheld/counter top scanner you find. Note: Because Beep Go relies on both the functionality of the IR sensor and the drivers installed on the S4/N3, custom ROMs typically won work with this app, even those based on TouchWiz.
Embiggen: Nifty app to produce giant text on your screen.
: Set way points from a map and locate them through the view finder via your camera, keep track of trails, portable maps for offline use, Google Map integration, and use the compass and dashboard to get your hardware information at a glance, and thus your altitude, speed, magnetic position, and a lot more. Great for hunting, fishing, trailblazing, hiking, etc.
: Use your phone screen and LED as flashlights; great when you in a pinch at night or in any low light setting. Also offers text input for Morse code, police lights, and strobe light effects.
: Turn your smartphone into a dash cam. I personally recommend this, ever since some asshole reared the front of my truck and took off. The accelerometer in the phone was tripped, and I got some nice clean video of the guys license plate as he drove away. I won what would have been a nasty insurance dispute thanks to this beauty. The best part is that it runs in the background, so you can have it going and use GPS or anything else you want.
: Official app of the American Red Cross. Comes with quizzes, easy to read instructions, and helpful videos for emergency situations. It has a simple UI, no ads, and it works offline. Download it and keep it mind; one day you may need to reference it, and doing so can prevent someone from suffering a long term injury, and you may even save a life.
Smart Remote for the HTC One/Galaxy S4: A great alternative to stock IR blaster applications. Easily add a remote for over 500,000 devices, ranging from DSLR cameras, media players, TV Cable boxes, a/c units, and much more. Comes with floating chat heads, customizable widgets, customizable remotes, and supports Air Gestures for the Galaxy S4. 30% off at the moment.
Duolingo: Simple way to learn another language. Interactive word games and a point system that benefits you as you become more consistent with translating and understanding your language of choice.
Planimeter: If you miss drawing/measuring between points on Google maps or you into any form of landscaping, here the app for you. Use GPS to measure distance and size of any given piece of land. Includes the option to manually walk a property line to measure and get the approx. space of a property.
: Your one stop shop code scanning. Scan QR codes/bar codes, make your own QR codes, choose which method to search code information by, and more. Has great, customizable widgets for ease of use.
: Turn your phone into a remote detection device. Can record stealthfully on lockscreen, e mail/text/Twitter message you pictures/videos of anything which trips the motion detection. Great for putting to use on an old device to watch over your property.
Augmented Reality Compass: Handy method to combine compass, GPS, and general location information into a customizable and easy to follow interface. Mark down specific areas and locate them via the AR compass, note tracks, log your GPS, and so on. Excellent for general navigation purposes.
SideBar Plus: The perfect multi tasking app! Customizable sidebars of size, amount, background, theme (Holo/gradiant and so on). A number of gestures supported, and supports items like widgets, shortcuts, etc. For example, want easy access to a flashlight Bills Sammy Watkins Jersey no matter what page you on? Add a flashlight widget and with a simple gesture you good to go.
: The best pod/video cast app. Create custom playlists from thousands of pocketcast selections, including StarTalk Radio, PBS, Freakonomics, and so much more. Great widget, supports background play, custom skip forward/rewind intervals, and even play your own media through the app. Math, materials, acoustics, Astronomy, Proteins, measurements, stock information, euphenisms, synonyms and much more. The perfect companion for general inquiry, number working, and problem solving.
Viki: Free shows/movies/music videos in a variety of languages from around the world. Predominately centered around Korean dramas, anime, Bollywood, etc., you also get some classics like Popeye cartoons. Recommend it if you want to catch up with some overseas shows, or just like to expand your media interests.
Google Goggles: Google search algorithem in picture form. In addition to scanning barcodes/QR codes, you can identify famous pictures, DvD covers, CD covers, game covers, books, landmarks, and more, including the ability to solve Sudoku puzzles. As this gets more refined with Google search algorithm, you be able to identify more objects instantly just by picture alone.
Sound viewer (Galaxy S4): Allows for easy sharing of Sound shot photos you take with your S4.
SCR pro: Pretty decent app for screen recording, requires root. It will also record audio, so it great for any screen commentaries you make, especially for games. Can be quite laggy depending on your background processes and you will take a hit to FPS, but it gets the job done.
Smart Tools: A worthy digital toolbox. Comes with metal detector, vibrometer, smart measure, smart ruler, balance meter, flash/torch light, compass, and more.
Androsensor: Your one stop shop for all your hardware information. From what software version you running, to how calibrated/sensitive your sensors are, to CPU/GPU/RAM info, battery status/temperature, and so on. Allows you to record and collect logs for tracking environmental information and changes in your phones behavior.
Instant Heart Rate: Get your heart rate information in seconds with pretty decent accuracy. After performing a test you be shown approximately where your heart rate is (low, average, high). You can also keep track of logs over several tests.
Flightradar2 Pro: The perfect aircraft tracking app, whether you an aircraft enthusiast or just want to check out information on a particular plane. Comes with augmented reality view for identifying aircraft by your phones camera, flight status, real time plane positions, cockpit view, and a lot more. Covers most of Europe, all of Wesley Johnson Authentic Jersey America, and a lot of coverage in Asia, Oceania, and Africa.