Comparison

Astro Viewer vs Atom Translate

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

Head to head
About

Astro Viewer

Features
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Astro Viewer is your ultimate gateway to the universe, powered by multiple world-class space agencies and observatories. Access thousands of stunning astronomical images from NASA, ESA/Hubble, ESA/Webb, and ESO. Whether you are a student, an educator, or a space enthusiast, explore the cosmos through multiple telescopes and perspectives like never before. WHAT'S NEW: MULTI-AGENCY EXPANSION Now featuring four major astronomical image sources: - NASA Open API - Space exploration imagery - ESA/Hubble Space Telescope - Iconic optical observations - ESA/Webb Space Telescope - Infrared universe revelations - ESO Public Archives - Ground-based astronomical excellence Experience the universe through the world's most powerful telescopes! KEY FEATURES Break Language Barriers: Search in Any Language - Supports 130+ languages via intelligent auto-translation - Type "Andromeda" in Korean, Japanese, French, or any other language - Smart search engine queries multiple databases and delivers unified results - Auto-translation instantly converts descriptions of galaxies, nebulae, and black holes to your native language Educational & Bilingual Tools - Original vs. Translated Toggle: Switch between translated and original English text with a single tapβ€”perfect for learning astronomical terms! - Detailed Metadata: Access photographer credits, observation dates, telescope specifications, and celestial keywords - Multi-Source Attribution: See which telescope/observatory captured each image Massive Astronomical Library - Multi-Agency Integration: Thousands of high-resolution images from NASA, Hubble, Webb, and ESO - Curated Catalog: Browse hand-picked selections of famous celestial objects (M31, M42, NGC series) - Smart Filtering: Focused purely on stunning celestial imageryβ€”no administrative photos - Diverse Perspectives: Compare optical (Hubble), infrared (Webb), and ground-based (ESO) views Save & Share the Wonder - High-Resolution Downloads: Save breathtaking space wallpapers directly to your gallery - Contextual Sharing: Share images with friends via social mediaβ€”text adapts to your language preference - Multi-Source Credits: Proper attribution to NASA, ESA, or ESO included Immersive Experience - Interactive Viewer: Zoom and pan to explore every stellar detail - Dark Mode UI: Sleek interface minimizing eye strain while viewing space imagery - Seamless Navigation: Browse across multiple archives effortlessly WHY ASTRO VIEWER? The universe is vast, but exploring it shouldn't be complicated. Astro Viewer combines the scientific depth of world-leading space agencies with the accessibility of modern translation technology. See the cosmos through Hubble's optical clarity, Webb's infrared vision, ESO's ground-based power, and NASA's exploration legacyβ€”all in one app. It's not just a gallery; it's a comprehensive learning tool that brings the universe to your fingertips. Download Astro Viewer today and start your multi-telescope journey through the stars! DISCLAIMER This application is a third-party educational tool developed by an independent developer. It utilizes publicly available APIs from NASA, ESA (European Space Agency), and ESO (European Southern Observatory) to fetch astronomical images, but is NOT affiliated with, endorsed by, or an official product of NASA, ESA, or ESO. Data sources: - NASA's Open API (api.nasa.gov) - ESA/Hubble Space Telescope Archive (esahubble.org) - ESA/Webb Space Telescope Archive (esawebb.org) - ESO Public Image Archive (eso.org) According to their respective media usage guidelines, this content is generally available for educational and non-commercial use. Hubble and Webb are joint projects of NASA and ESA. ESO operates ground-based observatories in Chile.

About

Atom Translate

Features
Read full description

Atom Translate helps you translate words and actually remember them β€” with a full vocabulary learning system built right in, at no cost to get started. TRANSLATE - Choose from multiple translation engines for the most accurate result - Translate between 30 languages, including English, Spanish, German, French, Chinese, Japanese, Korean, Arabic, and more - Voice input β€” dictate words instead of typing - Listen to pronunciation with text-to-speech for both original and translation - Save every translated word straight into your personal vocabulary ORGANIZE YOUR VOCABULARY - Structure words into Folders β†’ Sections β†’ Words β€” build your own language library your way - Add an image to any word to make it easier to remember - Search and sort your folders, edit words inline, track when each was added LEARN WITH 4 STUDY MODES - Flashcards β€” flip cards, mark what you know - Quiz β€” multiple choice with picture hints and streak tracking - Writing β€” type the word with letter hints when you need them - Matching β€” race the clock to pair words with translations TRACK YOUR PROGRESS - Every word moves through three mastery levels: new β†’ learning β†’ learned - Optional spaced repetition β€” words you know well come back less often, tricky ones come back sooner - Daily goals, activity streaks, and a heatmap calendar of your learning history - Detailed stats overall and per folder LEARN TOGETHER - Turn any folder into a public deck and share it with the community - Browse decks made by other learners, filter by language, category, and difficulty - Clone any deck to study it at your own pace, with your own progress tracked separately - See who made a deck and explore their other shared collections SYNCED ACROSS ALL YOUR DEVICES - Works offline β€” your vocabulary lives on your device - Sign in to sync folders, words, progress, and photos across phone, tablet, and desktop - Sign in with email or Google MADE FOR REAL LEARNERS Atom Translate is an independent app built by people who wanted a genuinely useful, all-in-one language tool β€” not a bare-bones translator, and not an app that locks the best features behind a paywall. Every core learning feature is free. If we ever offer optional extras, they'll be priced fairly β€” no inflated subscriptions. Import and export your vocabulary as CSV anytime β€” your words are always yours. Whether you're a student, a traveler, or just curious about a new language, Atom Translate gives you the tools to translate, organize, and truly learn β€” for free.

Screenshots

Astro Viewer4 screens
Atom Translate4 screens

Verdict

The call

The clearest difference is ads: Astro Viewer at none against Atom Translate's shown. Atom Translate's advantage is update cadence (every 9 days vs every 4 months). On price, in-app purchases, device support and iOS requirement there is nothing between them.

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

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Astro Viewer ships an update every 4 months, Atom Translate every 9 days. Both last shipped on October 15, 2026.

Scorecard2 real differences Β· 4 level
Astro Viewer versus Atom Translate: the parameters behind the verdict, then further details
ParameterAstro ViewerAtom Translate
PriceFreeFree
Update frequencyEvery 4 monthsEvery 9 days β€” better
AdsNo β€” betterYes
In-app purchasesNoNo
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.615.0 β€” better
Further details β€” not scored
Size20 MB95 MB
Age rating4+4+
DeveloperHeebok LeeValentyn Handrybida

In-app purchases

None

Astro Viewer

No in-app purchases

None

Atom Translate

No in-app purchases

Questions

Is Astro Viewer free?
Astro Viewer is free to download, with no in-app purchases.
Is Atom Translate free?
Atom Translate is free to download, with no in-app purchases.
Do Astro Viewer or Atom Translate have ads?
Atom Translate shows ads; Astro Viewer does not.
Which is updated more often, Astro Viewer or Atom Translate?
Astro Viewer ships an update every 4 months, and Atom Translate every 9 days. Most recently, Astro Viewer was updated on October 15, 2026 and Atom Translate on October 15, 2026.

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