When comparing NASA App vs Star Walk 2, the Slant community recommends Star Walk 2 for most people. In the question“What is the best stargazing app for Android?” Star Walk 2 is ranked 2nd while NASA App is ranked 4th. The most important reason people chose Star Walk 2 is:
Instead of only displaying what would be visible to the human eye, Star Walk displays gamma ray, x ray, h-alpha, infrared, microwave, and radio.
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Pros
Pro Updated daily
The NASA app has tons of information, most of which is updated constantly.
Pro A huge selection of content
Has over 14,000 images with more added regularly. In addition to images, this app also offers articles videos, TV feeds, and radio in order for users to get the most out of their viewing experience.
Pro Informs users of missions
The Missions calendar lets people see launch schedules and viewing opportunities based on current location. Countdown clocks are included for more precise timing.
Pro Displays different parts of the light spectrum
Instead of only displaying what would be visible to the human eye, Star Walk displays gamma ray, x ray, h-alpha, infrared, microwave, and radio.
Pro Users can choose which objects are displayed
Users can toggle which features are activated, such as constellation description or satellite display.
Pro 3D view of stars up close
Just tap on a star and see what it looks like from a closer perspective.
Pro Identifies satellites
For 99 cents, satellites can be tapped for identification. This app contains information on over 9000 satellites.
Pro Contains information about all the planets
Star Walk 2 attempts to give users a comprehensive view of all the things that are currently happening in space, this includes events at other planets. For instance, it displays the angle of rotation around the sun, sunrise, sunset, and length of day on that particular planet.
Pro Adds illustrations over feed from camera
Instead of just displaying a feed of what the sky should look like when the device is aimed in different directions, Sky Walk paints stars, constellations, and satellites over real time images taken from the device's camera.
Cons
Con Not much info on celestial bodies
While this app gives users a ton of information on NASA's activities, it doesn't provide useful information for stars.
Con Unstable for many users
Many people who have this app complain that it crashes within seconds of starting.
Con Outdated data base
2016 and 2017 are not in data base. Can't view anything discovered after 2015. Comets like johnson can't be found.