Comparison

DISCS vs Space Telescope App

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

DISCS

Contribute observations about local crop conditions and drought impacts to a scientific community. View your reports alongside data from NASA satellites, NOAA rainfall, and ground sensors.

Highlights
  • Report crop conditions
  • Upload photos
  • View drought data
  • See rainfall information
  • Monitor vegetation health
  • Observe satellite data
Read full description

The smartphone app “Drought Information Supported by Citizen Scientists” (DISCS) was created by researchers at NASA’s Marshall Space Flight Center to facilitate the sharing and delivery of hydrologic and agricultural information from citizen scientists to the scientific community and partners involved in the monitoring of drought conditions. Users, as Citizen Scientists, are encouraged to contribute photos of local crop conditions along with information about crop type, crop health, soil moisture conditions, and other notes about drought impacts. In exchange, users of the app can observe their reports alongside reports of other Citizen Scientists, and view their information in the context of drought information from the U.S. Drought Monitor, recent rainfall data from NOAA, soil moisture information from ground sensors or through NASA modeling approaches, and view information about vegetation health and stress as observed from NASA’s constellation of satellites.

About

Space Telescope App

Explore the universe with real-time updates and stunning visuals from NASA's James Webb Space Telescope. Engage with expert insights, join community discussions, and test your knowledge with interactive quizzes. Discover distant galaxies and unlock the secrets of the early universe.

Highlights
  • Live mission updates
  • Breathtaking image gallery
  • Expert Q&A with astronomers
  • Community discussions
  • Interactive space quizzes
  • 3D solar system explorer
  • Exclusive wallpapers
Features
Read full description

Space Telescope is an astronomy app for people who actually go outside and look up. See what the James Webb Space Telescope is observing right now. Decide whether tonight is worth staying out for. Catch the next visible ISS pass over your own location, and follow the rocket launches coming up. WHAT WEBB IS LOOKING AT, RIGHT NOW Webb's current target, science category, proposal, instruments and scheduled times, refreshed every five minutes while the view is open. Tap through to the proposal or the full observation schedule. A REAL PLAN FOR METEOR NIGHT Most meteor apps hand you a peak date. This one tells you what you will actually see. Set your location and how dark your sky is, and get an honest meteors-per-hour range, the best viewing window, where to look, how much the Moon will wash out, and what 30, 60 or 90 minutes outside is likely to be worth. Two alerts that matter: a heads-up the evening before, and a nudge when your window opens. Cloud cover is not included, so check the weather before you commit. THE ISS, OVER YOUR HOUSE Live position, altitude, velocity and orbit, plus crew, expeditions, dockings and visiting vehicles. Seven days of passes for your location with quality, direction, peak elevation and duration - set a 10-minute alert or drop the pass straight into your calendar. LAUNCH DAY Upcoming launches with live countdowns, status, provider, rocket, pad, launch window and webcast link. One tap for a reminder 15 minutes before liftoff. GALLERIES WORTH SCROLLING Imagery and mission guides for James Webb, Hubble, Chandra, the Nancy Grace Roman Space Telescope, Artemis, Mars and the ISS. Follow Roman's countdown, instruments and journey to L2. Pinch to zoom, save, share, like and comment. Turn on alerts only for the galleries you care about. PICTURE OF THE DAY NASA's Astronomy Picture of the Day, image or video, with the full expert explanation and an optional daily alert. AND WHEN YOU WANT MORE - Tonight Sky: sunrise, sunset, Moon phase, illumination and twilight - Space Weather: Kp index, solar wind, aurora probability and active alerts - Cosmic Calendar: meteor showers, eclipses and other sky events - Exoplanets: discovery method and year, distance, orbit, mass, radius, temperature, host star and habitable-zone marker - Community astrophotography: post your own shots with gear and conditions - Space wallpapers for your phone - Quizzes, points, levels and global leaderboards - Ask an Astronomer, and live chat rooms in 10 languages - Full interface in English and Spanish PREMIUM Space Telescope is free, with ads. Premium removes every ad, unlocks the premium wallpaper collection and adds a gold avatar ring. Choose a monthly or annual subscription, or pay once for lifetime access, which also grants 1,000,000 points and Diamond level straight away. Subscriptions are charged to your Apple Account and renew automatically unless auto-renew is turned off at least 24 hours before the current period ends. Manage or cancel in your Apple Account settings. Whether you follow Webb every day, plan a Perseids or Geminids watch, photograph the night sky, teach astronomy, or just want to know when the ISS will cross overhead, Space Telescope keeps the useful details in one place. Space Telescope is an independent astronomy app and is not affiliated with or endorsed by NASA, ESA, STScI, SpaceX or any launch provider. Data and imagery are credited to their respective sources. Privacy policy: https://jameswebbtracker.com/privacy-policy Terms of use (Apple standard EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

DISCS4 screens
Space Telescope App4 screens

Verdict

The call

The clearest difference is rating: Space Telescope App at 4.1 against DISCS's 2.0. Space Telescope App also leads on update cadence (every 10 days vs every 2 months) and ratings volume (31 vs 3). DISCS's advantage is in-app purchases (none vs 4) and ads (none vs shown). On price and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Space Telescope App sells 4 in-app purchases, starting at $4.99 per month. DISCS asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Space Telescope App holds the better App Store score, 4.1 against 2.0. That said, the two scores are not equally well evidenced: Space Telescope App has 31 ratings behind it against 3, so its average is the more settled of the two. Written reviews complicate that: 50% of DISCS's written reviews are positive against 40% of Space Telescope App's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

DISCS ships an update every 2 months, Space Telescope App every 10 days. The most recent releases landed on October 1, 2026 and October 27, 2026 respectively.

Scorecard8 real differences · 2 level
DISCS versus Space Telescope App: the parameters behind the verdict, then further details
ParameterDISCSSpace Telescope App
PriceFreeFree
Rating2.0 (3 ratings)4.1 (31 ratings) — better
Positive reviews50.0% of reviews — better40.0% of reviews
Number of ratings331 — better
Update frequencyEvery 2 monthsEvery 10 days — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS8.0 — better15.0
Further details — not scored
Size54 MB104 MB
Age rating4+4+
DeveloperNASAKAKHA GIORGASHVILI

Customer experience

DISCS

All ratings3 ratings
Positive0.0%
Neutral33.3%
Negative66.7%
Written reviews2 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

Space Telescope App

All ratings30 ratings
Positive73.3%
Neutral6.7%
Negative20.0%
Written reviews30 reviews
Positive40.0%
Neutral10.0%
Negative50.0%

In-app purchases

None

DISCS

No in-app purchases

4 purchases

Space Telescope App

Subscriptions2
  • Monthly Ad-Free Plan$4.991 Month
  • Ad-Free Annual Access$29.991 Year
One-time2
  • Premium$2.99
  • Buy 1M Points$99.99

Questions

Is DISCS free?
DISCS is free to download, with no in-app purchases.
Is Space Telescope App free?
Space Telescope App is free to download, with in-app purchases available.
Which has better reviews, DISCS or Space Telescope App?
Space Telescope App is rated higher. DISCS averages 2.0 out of 5 from 3 ratings, while Space Telescope App averages 4.1 from 31 ratings.
Do DISCS or Space Telescope App have ads?
Space Telescope App shows ads; DISCS does not.
Which is updated more often, DISCS or Space Telescope App?
DISCS ships an update every 2 months, and Space Telescope App every 10 days. Most recently, DISCS was updated on October 1, 2026 and Space Telescope App on October 27, 2026.

Other comparisons