Comparison

Scan the Sky vs Dyausa

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

Head to head
About

Scan the Sky

Discover celestial events and track satellites with real-time data. Explore light pollution maps, meteor shower indexes, and constellation guides. Get space weather alerts and cloud cover forecasts for optimal stargazing.

Highlights
  • Light pollution scouting map
  • Meteor shower index and alerts
  • ISS live tracking
  • Seasonal constellation guide
  • Space weather matrix
  • Cloud cover and lunar projections
Read full description

Scan the Sky is your ultimate live cosmic tracking and orbital discovery tool. Whether you are a casual stargazer or an avid astronomer, our real-time atmospheric and celestial data ensures you never miss a moment under the stars. Key Features: -Light Pollution Scouting Map: Tap anywhere on our interactive map to calculate regional skyglow degradation. Find the perfect Class 1 pristine dark sky site with our Bortle scale indicator. -Meteor Shower Index: Get real-time radiant tracking and peak activity alerts for major cosmic streams, from the Perseids to the Geminids. -ISS Live Tracking: Our orbital matrix tells you exactly when the International Space Station is flying overhead, including altitude, speed, and visibility flags. -Seasonal Constellation Guide: Beautiful vector mapping and historical lore for constellations tailored exactly to your GPS coordinates and the current season. -Space Weather Matrix: Live NOAA data streams alert you to active solar storms and geomagnetic Kp-index spikes so you can chase the aurora. -Live Cloud Cover & Lunar Projections: Open-Meteo forecasts combined with exact moon phase calculations ensure you only head out when the canopy is crystal clear.

About

Dyausa

Features
Read full description

Dyausa: Vedic Sky Map Dyausa is the only iOS sky map dedicated to and built for the Vedic night sky, which includes the 27 nakṣatras, the 12 rāśis, and 108 padas as true sky regions. This app also shows the positions of Yogatārās, Vedic star names, Rāhu and Ketu. Point your device up and see the real stars, planets, and Moon with the Vedic map drawn behind them, the way Vedic astronomers and ancient ṛṣis have charted it for millennia. For stargazers, students, and the community of Vedic-astronomy enthusiasts, this is a real planetarium built on a real ephemeris and your location that speaks the Vedic sky natively. This tool will greatly benefit the Vedic astronomy community as it displays ancient mathematics on your device — a yantra for seeing, learning and discovering. What Dyausa draws: • Live crosshair readout — point anywhere and read the rāśi, nakṣatra, and pada in real time. • Yogatārā highlighting — focus any nakṣatra zone and its true anchor star or constellation lights up on the live sky: Jyeṣṭhā lights up red Antares, the heart of the scorpion; Śravaṇa lights the three stars of hearing with Altair in the middle; Kṛttikā lights the Pleiades. • Travel anywhere — search any place on Earth and see the Vedic sky exactly as it stands there, then return to your own location whenever you like. • Travel in time — move the sky forward or back to any date and watch the grahas, the Moon and the nakṣatras shift, or look ahead to a date that matters to you. • The sky divided the Vedic way — the ecliptic sliced into sectors and drawn as beams across the real stars: the 12 rāśis, the finer 27 nakṣatras, and the finest 108 padas — three ways of carving the same great circle — plus Rāhu and Ketu, the lunar nodes. • The real sky underneath — accurate stars, constellations, the Milky Way, Sun, Moon, and planets for your exact time and place. • Sanskrit or English — real Devanāgarī names, or English — your choice.

Screenshots

Scan the Sky4 screens
Dyausa4 screens

Verdict

The call

The clearest difference is iOS requirement: Scan the Sky at 15.0 against Dyausa's 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

CostPrice · In-app purchases · Ads · Monetization

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

Scorecard1 real difference · 9 level
Scan the Sky versus Dyausa: the parameters behind the verdict, then further details
ParameterScan the SkyDyausa
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequency—Weekly
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.0 — better17.0
Further details — not scored
Size4 MB7 MB
Age rating4+4+
DeveloperAbigail WiseAdit Goel

In-app purchases

None

Scan the Sky

No in-app purchases

None

Dyausa

No in-app purchases

Questions

Is Scan the Sky free?
Scan the Sky is free to download, with no in-app purchases.
Is Dyausa free?
Dyausa is free to download, with no in-app purchases.
Do Scan the Sky or Dyausa have ads?
Neither Scan the Sky nor Dyausa shows ads.

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