Comparison

ISS Explorer vs Schüler

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

Head to head
About

ISS Explorer

Explore a detailed 3D model of the International Space Station. Rotate, zoom, and select individual components to learn about their function and systems. Organize your view by turning parts and labels on or off.

Highlights
  • Interactive 3D ISS model
  • Rotate and zoom functionality
  • Selectable parts with isolation
  • Detailed information on components
  • Hierarchical part organization
  • Toggle parts and labels
Features
Read full description

The ISS explorer is an interactive tool for exploring the parts and pieces of the International Space Station (ISS). The application allows the user to view a 3D model of the ISS, rotate it, zoom into it, and select different parts and pieces. When the application starts, you can see a view of the entire ISS with category labels. Tabs are available on the left hand side of the screen which allow you access to information, the hierarchy, settings and application information. From this point, you can zoom into the station, revealing more labels of visible parts. The station can also be rotated to view from different angles. If a part is selected, the part is isolated so that you can focus on the specific piece. The information tab shows information about the currently isolated part. Inside the hierarchy tab, you can turn parts on or off, turn labels for parts on or off, turn parts transparent, or select a part to focus on. The parts are organized in a hierarchy to allow for systems to be described and displayed. This includes things such as truss, modules, and external platforms. The Information tab shows information about the current isolated part, system, or the full ISS if the entire station is shown.

About

Schüler

Features
Read full description

Simple, effective German vocabulary learning: Flash cards are one of the best tools for memorizing information. This application provides a set of flash cards for memorizing vocabulary. These electronic flash cards are used just like paper or cardboard cards. The English word is displayed on one side, and the German word is displayed on the other. You can hear the pronunciation of each word. You can go through the cards, and see how many words you get right. Once you feel confident in your knowledge, you can test yourself by taking the Quiz. You can configure your learning experience by selecting the number of cards, category, and order of presentation. Other great tools for learning and memorizing vocabularies are word games. The word games included in this application are Concentration and Mix & Match. You can use these games to improve your memory and word association skills. Concentration is an educational game in which some cards are laid face down on a surface and two cards are flipped face up over each turn. The object of the game is to turn over pairs of matching cards. A matching pair is one where an English word matches a corresponding German word. When a matched pair is selected both cards remain turned over. The game ends when the last pair has been turned. The score is determined by the amount of time required to find all matching pairs. In Mix & Match, a player matches English words to corresponding German words. Words can be dragged around the screen. Any two words side-by-side are considered “matched” The game ends when all words have been matched correctly. The time you take to match all words determines your score. Schüler comes with a lexicon of over 850 commonly used words. These words can be organized into “categories”, or user-defined groups, to make the learning process more focused and effective. There is also the option of adding your own words, as many as you want. The lexicon can be searched, providing a simple, handy English-German/German-English dictionary. Check out the help pages included with the application to see how vocabulary items can be added, edited and deleted.

Screenshots

ISS Explorer4 screens
Schüler4 screens

Verdict

The call

The clearest difference is price: ISS Explorer at Free against Schüler's $3.99. ISS Explorer also leads on update cadence (every 10 months vs every 22 months). Schüler's advantage is iOS requirement (11.0 vs 13.0). On ads, in-app purchases 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

ISS Explorer is free to download; Schüler costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

ISS Explorer ships an update every 10 months, Schüler every 22 months. The most recent releases landed on October 13, 2026 and October 12, 2026 respectively.

Scorecard3 real differences · 7 level
ISS Explorer versus Schüler: the parameters behind the verdict, then further details
ParameterISS ExplorerSchüler
PriceFree — better$3.99
Rating4.9 (16 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings16 — better—
Update frequencyEvery 10 months — betterEvery 22 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.011.0 — better
Further details — not scored
Size747 MB7 MB
Age rating4+4+
DeveloperNASAAvocado Software

In-app purchases

None

ISS Explorer

No in-app purchases

None

Schüler

No in-app purchases

Questions

Is ISS Explorer free?
ISS Explorer is free to download, with no in-app purchases.
Is Schüler free?
Schüler costs $3.99, with no in-app purchases.
Do ISS Explorer or Schüler have ads?
Neither ISS Explorer nor Schüler shows ads.
Which is updated more often, ISS Explorer or Schüler?
ISS Explorer ships an update every 10 months, and Schüler every 22 months. Most recently, ISS Explorer was updated on October 13, 2026 and Schüler on October 12, 2026.

Other comparisons