DeepVoid vs CosmoSize
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
DeepVoid
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Explore the universe with DeepVoid, a clear and immersive guide to space science. Track the International Space Station in real time with its current position, altitude, and velocity. Follow upcoming rocket launches with countdowns, mission details, launch providers, and locations. Explore near-Earth asteroids through a focused catalog with estimated size, closest approach distance, and risk classification. Then go deeper with beautifully presented science stories about black holes, gravity, the speed of light, gravitational waves, and the expanding universe. DeepVoid brings live space data and timeless cosmic questions together in one calm, visual experience. Discover something new every time you look up.
CosmoSize
Explore the vastness of the universe through an interactive gallery of celestial objects. Compare sizes, learn scientific facts, and navigate cosmic scales with intuitive gestures. Ideal for educational settings and curious minds.
- Interactive celestial object gallery
- Compare sizes with familiar objects
- Learn science facts
- Multi-language support
- Offline core content
- Guided educational display
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How large is the universe? Numbers are easy to read, but cosmic scale is hard to feel. CosmoSize arranges 128 celestial objects by real diameter in one interactive gallery. Begin with 151 meter Dimorphos, then travel through planets, stars, black holes, nebulae and galaxies. You can: 1. Drag with one finger to travel between objects 2. Pinch with two fingers to explore changes in scale 3. Tap any object to see its diameter and science story 4. Compare celestial objects with a person, a blue whale, Voyager 1, the International Space Station and Mount Everest 5. Jump between All Objects, Deep Space, Black Holes, the Solar System and Stars 6. Explore freely in Personal mode 7. Run an automatic guided display in classrooms, homes and exhibitions 8. Switch between Chinese, English, Japanese, Korean and Spanish No account is required. The app contains no advertising, in app purchases, analytics or cross app tracking. Core content works offline.
Screenshots
Verdict
The clearest difference is ads: CosmoSize at none against DeepVoid's shown. On price, 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
| Parameter | DeepVoid | CosmoSize |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (6 ratings) — better |
| Number of ratings | — | 6 — better |
| Update frequency | Weekly | — |
| Ads | Yes | No — better |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.4 | 15.0 — better |
| Further details — not scored | ||
| Size | 86 MB | 181 MB |
| Age rating | 4+ | 4+ |
| Developer | Douglas Nunes de Mattos | ONLIST |
In-app purchases
DeepVoid
No in-app purchases
CosmoSize
No in-app purchases
