Comparison

ISS Explorer vs Hydra Budding

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

Hydra Budding

Features
Read full description

“Reproduction in Hydra by Budding – EduTech Era” is an interactive learning app designed to help students clearly understand how Hydra reproduces through the budding process. With high-quality visuals, smooth animations, audio explanations, and easy navigation, this app simplifies complex biology concepts for learners of all levels. Explore every stage of Hydra budding - from initial bud formation to growth and detachment - using detailed diagrams and labeled structures. The app includes zoom, rotate, and clear step-by-step guidance to make learning engaging and effortless. Ideal for school students, teachers, and anyone interested in understanding asexual reproduction in simple organisms. Features: - Detailed study of Hydra budding - High-quality diagrams and animations - Audio explanations for better understanding - Zoom, rotate, and clear UI for easy learning - Step-by-step bud formation process - Clean, simple, and student-friendly design - Helpful for class notes, revision, and presentations

Screenshots

ISS Explorer4 screens
Hydra Budding4 screens

Verdict

The call

The clearest difference is price: ISS Explorer at Free against Hydra Budding's $1.99. ISS Explorer also leads on update cadence (every 10 months vs every 44 months). On ads, in-app purchases, device support and iOS requirement 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; Hydra Budding costs $1.99 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, Hydra Budding every 44 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 8 level
ISS Explorer versus Hydra Budding: the parameters behind the verdict, then further details
ParameterISS ExplorerHydra Budding
PriceFree — better$1.99
Rating4.9 (16 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings16 — better—
Update frequencyEvery 10 months — betterEvery 44 months
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.012.0 — better
Further details — not scored
Size747 MB273 MB
Age rating4+4+
DeveloperNASAVIRTUAL FILAMENTS PRIVATE LIMITED

In-app purchases

None

ISS Explorer

No in-app purchases

None

Hydra Budding

No in-app purchases

Questions

Is ISS Explorer free?
ISS Explorer is free to download, with no in-app purchases.
Is Hydra Budding free?
Hydra Budding costs $1.99, with no in-app purchases.
Do ISS Explorer or Hydra Budding have ads?
Neither ISS Explorer nor Hydra Budding shows ads.
Which is updated more often, ISS Explorer or Hydra Budding?
ISS Explorer ships an update every 10 months, and Hydra Budding every 44 months. Most recently, ISS Explorer was updated on October 24, 2026 and Hydra Budding on October 25, 2026.

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