Cosmic vs Henge
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Cosmic
Explore the cosmos with this app that offers interactive tools for celestial navigation and astronomical observation. Visualize the sky, Earth, and solar system from multiple perspectives, and discover constellations, planets, and events in augmented reality. It's a blend of ancient wisdom and modern technology for a deeper connection to the universe.
- Multiple celestial perspectives (sky, Earth, solar system)
- Augmented reality sky exploration
- Interactive astronomical and world clocks
- Visualized natal charts (Western, Vedic, Sidereal)
- Day/night cycles on Earth globe
- Celestial navigation guides
- Notifications for astronomical events
Read full descriptionHide full description
The sky above you, the Earth beneath you, the solar system you move through space. Three perspectives no other app combines this way. For thousands of years humans read the sky to measure time, navigate the Earth, and find meaning in their existence. Astronomy, astrology, and timekeeping were one science. Cosmic Watch reunites them. Free for the first time in ten years. FEATURES (core) • Sky View — stars, planets, and constellations • Earth View — day and night cycle, the cosmos around it • Solar System — geocentric and heliocentric • Celestial sphere — full 360° sky overview, unique to this app • Astrology Mode — Western, Vedic and 3D • Retrograde motion across all planets • World clock and astronomical events • Notifications for eclipses, solstices, and moon cycles • Celestial navigation — orient yourself by the sky Or just watch the Earth float in space and remember where you are. Free to explore. The three views, sky guide, every layer, star names, world clock, and notifications are yours from the first open. Tools and Time Control unlock with a subscription — or forever with Cosmic Pro. Keep the project alive and growing. We read every message you send us. TOOLS (in-app purchase) • Moon Calendar • Real-Time Clouds • Meteor Showers • Comets • Planetary Aspects • Retrograde Year • Dreamspell Calendar • Atmosphere Clockface • Save Date / Time / Location • Time Control — move forward and back, any moment A full app. Not a widget or watch face, yet. Runs on iPhone, iPad, and Apple Silicon Mac Privacy committed: No account required. Analytics never shared. Webby Award for Best Educational App 2018. New York Times. Wired. Space.com. By a Chi Gong master and an animation artist. Still looking up. Time is the Cosmic Rhythm. Terms of Use: https://cosmic-watch.com/termsOfService/ Privacy Policy: https://cosmic-watch.com/privacyPolicy/
Henge
Read full descriptionHide full description
THE MONUMENT • The whole circle raised: thirty sarsen uprights and their lintel ring, the five great trilithons, the bluestone circle and horseshoe, the Altar, Slaughter and Heel Stones, the Station Stone rectangle and the fifty-six Aubrey holes — every stone carrying its Petrie number. • On real ground: the terrain is Salisbury Plain's own survey data, and the ridge the midsummer sun clears is the one that actually stands there. • Weathered sarsen and Preseli bluestone, damp courses and lichen, wind moving through the grass, torchlight for the dark hours. THE CALENDAR • The Wheel of the Year: solstices, equinoxes and the four cross-quarter festivals — Imbolc, Beltane, Lughnasadh, Samhain — each landing on the instant the sun actually arrives, not on a calendar date. • Moon phases, eclipse seasons and the 18.6-year lunar standstill, solved from the real ephemeris. • A time machine from 3000 BC to AD 3000. Watch Thuban hold the celestial pole for the builders in an age when Polaris was no use to anyone. • The sky over your own longitude, or over Wiltshire. HONEST ARCHAEOLOGY Every claim the app makes about the monument carries its tier — Established, Debated, or Modern tradition — with the sources one tap away. The solstice axis is established. The equinoxes at Stonehenge are modern tradition, and the app says so. Free to explore in fifteen-minute sessions. One purchase unlocks the clock and the calendar for good — no subscription, no account, no network, and no data collected.
Screenshots
Verdict
The clearest difference is update cadence: Henge at every 10 days against Cosmic's every 6 months. Cosmic's advantage is iOS requirement (15.0 vs 17.0). On price, 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
Both are free to download. Cosmic sells 6 in-app purchases, starting at $0.99 per month and Henge sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Cosmic ships an update every 6 months, Henge every 10 days. The most recent releases landed on October 26, 2026 and October 29, 2026 respectively.
| Parameter | Cosmic | Henge |
|---|---|---|
| Price | Free | Free |
| Rating | 4.8 (636 ratings) — better | — |
| Positive reviews | 86.8% of reviews | — |
| Number of ratings | 636 — better | — |
| Update frequency | Every 6 months | Every 10 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 194 MB | 11 MB |
| Age rating | 4+ | 4+ |
| Developer | Celestial Dynamics AG | river.io llc |
Bugs and requests
Cosmic
Reported bugs
3 issues- Date and time not accurately reflected in the solar system view
- Inconsistent behavior when switching between different modes and settings
- Difficulty in maintaining user preferences across sessions
Requested features
5 requests- Add an alarm feature to wake up to different celestial views
- Implement support for Apple Watch and other wearables
- Provide more options to customize the display and information layers
- Include a night mode or dimmer setting for better visibility in low light
- Integrate with other astronomy apps and tools for a more comprehensive experience
Henge
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Cosmic
- Monthly Plan$0.991 Month
- Monthly$2.991 Month
- Yearly Plan$4.991 Year
Show 1 moreShow fewer
- Yearly$24.991 Year
- Tools Pack$2.99
- Cosmic Pro$69.99
Henge
- The full version$19.99









