Comparison

星座早見 / Planisphere vs Constellation Map mobile

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

Head to head
About

星座早見 / Planisphere

This app simulates the night sky, displaying stars, planets, and the moon. It functions like a traditional planisphere but with added digital features, allowing users to easily view celestial positions and predict sunrise/sunset times.

Highlights
  • Real-time sky display
  • Planet and moon tracking
  • Interactive sky map
  • Sunrise/sunset prediction
  • Zoomable interface
  • Dark-friendly screen
Read full description

The planetarium curators of Nagoya City Science Museum have originally designed the Planisphere app. Many people know how to use the planisphere, because we learn it at elementary school. This is the planisphere of the era of IT which added the advantage as an app, with the plain usage of the planisphere printed on paper and plastic. Please look up at the real starry sky with this Planisphere app. The Planisphere app shows the sky of the current time at the start-up. To check the sky at other time, you drag around the date scale with your fingertips to set the date and time. You can use pinch gestures to manipulate a map of the sky. It attends you to enjoy the star watching by glowing in dark place. It is the exceptional planisphere app, because it’s displayed up to the planet positions of the night that is impossible with the printed planisphere! 【Features of the Planisphere application】 ・ Anytime, anywhere: When you look up at the night sky, it stands by in your smartphone or tablet. ・ Very easy usage: The usage of planisphere is exactry same as you learned. Just touch and rotate the board. ・ Quick access : The Planisphere shows the night sky when you start the app. It is easier than a printed planisphere. ・ Prominent planets: The planets always stand out in the night sky. However, the planet positions change day by day, so it is not possible to display on the printed planisphere. The Planisphere app calculates the positions in the night of the 5 planets and the Moon that are seen by the naked eye and displays them as icons on the board. ・ Good at dark places : When we look up at the starry sky, we are of course in a dark place. We needed a torch when using a printed planisphere. But the Planisphere app can be used in the darkness because of the screen light. A tip when using the app is to reduce the screen brightness not to be dazzling. ・ Friendly to any ages: It is difficult to see small letters in a dark place. You can freely zoom in and out with the fingertips on the Planisphere app. Furthermore, it is easier to see than a printed planisphere, since the screen of smart phone or tablet have a light. ・ Sunrise and sunset : You can find the sunrise time by setting a target object to the eastern horizon and the sunset time by setting it to the western horizon on the board. On the Planisphere app, you can find the rough time and direction of sunrise or sunset, because it shows not only stars but also the planets and the Moon. ・ For education : In schools, science museums, planetariums and public astronomical observatories, there are occasions that to explain how to use a planisphere. It is small letters and hard to show to people when explaining the usage. For now, you can connect a smart phone or a tablet to a projector or a big monitor to make the planisphere image larger. There is also a more sophisticated computer version (for Windows and Macintosh) of the Planisphere app. If your school provides tablets to the students, you can use the Planisphere app instead of a printed planisphere. ・ Planetarium of Nagoya City Science Museum opened in 1962. It is the planisphere which contains a lot of curator's experience and know-how. We have made it as an application that we use printed planispheres for the citizen observation party, educational programs, astronomical exhibition room of Nagoya City Science Museum and sell at the museum shop. Bright famous stars, Moon and planets are visible even in the town. Please look up at the real starry sky with this Planisphere app. ・ Astronomical information of Nagoya City Science Museum introduces various astronomical phenomena and events. Please also click here if you would like to know more about the Planisphere app. >Astronomical information http://www.ncsm.city.nagoya.jp/study/astro/ >Planisphere http://www.ncsm.city.nagoya.jp/study/astro/hayami.html

About

Constellation Map mobile

Explore the night sky by pointing your device upwards. Identify stars, constellations, and planets with detailed information. View celestial bodies below the horizon and track planetary orbits.

Highlights
  • Identify stars, constellations, and planets
  • View celestial bodies below the horizon
  • Track planetary orbits
  • Display over 100 bright stars and objects
  • Zoom and pan with touch gestures
  • Toggle display of constellation lines and names
Features
Read full description

Simply point your device towards the sky and this application will display the names of the stars, constellations and planets. You can check the orbital position of the planet in the solar system on a separate screen. You can also display stars below the horizon. You can display the names of about 100 bright stars, constellations, ecliptic, celestial equator, Deep Sky Objects, ISS, Celestial pole, and so on. You can enlarge or reduce the display by spreading or narrowing (pinch operation) with two fingers. Toggle display / non-display of constellation line, name etc. with double touch.

Screenshots

星座早見 / Planisphere4 screens
Constellation Map mobile4 screens

Verdict

The call

The clearest difference is review sentiment: Constellation Map mobile at 86% against 星座早見 / Planisphere's 0%. Constellation Map mobile also leads on rating (4.7 vs 1.0) and ratings volume (4.6K vs 1). 星座早見 / Planisphere's advantage is in-app purchases (none vs 1) and ads (none vs shown). On price, update cadence 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. Constellation Map mobile sells 1 in-app purchase, starting at $1.99 per month. 星座早見 / Planisphere asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Constellation Map mobile holds the better App Store score, 4.7 against 1.0. That said, the two scores are not equally well evidenced: Constellation Map mobile has 4.6K ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 0% of 星座早見 / Planisphere's written reviews are positive against 86% of Constellation Map mobile's.

UpkeepUpdate frequency

星座早見 / Planisphere ships an update every 5 weeks, Constellation Map mobile every 6 weeks. The most recent releases landed on June 24, 2026 and September 22, 2026 respectively.

Scorecard7 real differences · 3 level
星座早見 / Planisphere versus Constellation Map mobile: the parameters behind the verdict, then further details
Parameter星座早見 / PlanisphereConstellation Map mobile
PriceFreeFree
Rating1.0 (1 ratings)4.7 (4.6K ratings) — better
Positive reviews0.0% of reviews86.4% of reviews — better
Number of ratings14.6K — better
Update frequencyEvery 5 weeks — betterEvery 6 weeks
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size277 MB39 MB
Age rating4+4+
DeveloperIMAGE FACTORY CO., LTD.siranet GK

Customer experience

星座早見 / Planisphere

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Constellation Map mobile

All ratings4,604 ratings
Positive94.1%
Neutral3.5%
Negative2.4%
Written reviews455 reviews
Positive86.4%
Neutral3.3%
Negative10.3%

Bugs and requests

星座早見 / Planisphere

Not enough reviews yet to summarise bugs or requests.

Constellation Map mobile

Reported bugs

3 issues
  • App crashes on opening
  • Incorrect positioning of sun, moon, and planets
  • Constellation names disappearing or not displaying properly

Requested features

4 requests
  • Add option to view constellations from inside the celestial sphere
  • Improve search functionality to easily find planets, stars, and galaxies
  • Provide more detailed information and descriptions for celestial objects
  • Add ability to calibrate the app to match the actual sky view

In-app purchases

None

星座早見 / Planisphere

No in-app purchases

1 purchases

Constellation Map mobile

Subscriptions1
  • Remove ads 1 month$1.991 Month

Questions

Is 星座早見 / Planisphere free?
星座早見 / Planisphere is free to download, with no in-app purchases.
Is Constellation Map mobile free?
Constellation Map mobile is free to download, with in-app purchases available.
Which has better reviews, 星座早見 / Planisphere or Constellation Map mobile?
Constellation Map mobile is rated higher. 星座早見 / Planisphere averages 1.0 out of 5 from 1 ratings, while Constellation Map mobile averages 4.7 from 4.6K ratings.
Do 星座早見 / Planisphere or Constellation Map mobile have ads?
Constellation Map mobile shows ads; 星座早見 / Planisphere does not.
Which is updated more often, 星座早見 / Planisphere or Constellation Map mobile?
星座早見 / Planisphere ships an update every 5 weeks, and Constellation Map mobile every 6 weeks. Most recently, 星座早見 / Planisphere was updated on June 24, 2026 and Constellation Map mobile on September 22, 2026.

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