Comparison

Zodiac Constellations Guide vs Astronomy Observer

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

Head to head
About

Zodiac Constellations Guide

Explore the night sky and discover the 12 zodiac constellations with stunning 3D models. Rotate, zoom, and compare them to real star patterns. Perfect for astronomy and astrology enthusiasts.

Highlights
  • Interactive 3D constellation models
  • Zoom and rotate functionality
  • Compare models to night sky
  • Information on zodiac sign dates
  • Stunning graphics and visual effects
Features
Read full description

What zodiac sign were you born under? Interested in astronomy or astrology? Love observing the night sky full of constellations and stars? With this astronomy app, you will discover the dates of the twelve zodiac signs and observe amazing 3D models of constellations, look at them from aside, zoom in and out, rotate in different directions, and check them with the star patterns in the night sky. Enjoy the 3D models of 12 zodiac signs: ◆ Aries ◆ Taurus ◆ Gemini ◆ Cancer ◆ Leo ◆ Virgo ◆ Libra ◆ Scorpio ◆ Sagittarius ◆ Capricorn ◆ Aquarius ◆ Pisces Even if you are not an astronomy lover, you will definitely enjoy contemplating zodiac constellations in this app. Stunning graphics and visual effects of our 3D models of constellations will blow you away. By the way, did you know that... The zodiac, the 12 signs listed in a horoscope, is closely tied to how the Earth moves through the heavens. The zodiac signs are derived from the constellations that mark out the path on which the Sun appears to travel over the course of a year. You might think that dates in a horoscope correspond to when the Sun passes through each constellation. However, much of the time, they don’t because astrology and astronomy are different systems. Please note that this astronomy app includes only 12 constellations; you can find all 88 constellations in Star Walk 2, one of the most popular stargazing apps. If you love exploring the stars and the night sky, this is a must-have astronomy app for you. Your feedback is welcome! Enjoy!

About

Astronomy Observer

This app helps astronomical observers plan their viewing sessions by calculating and displaying the positions of celestial bodies. It offers AR views, a catalog of stars and deep sky objects, and an astronomical event calendar. Premium features include ad-free viewing and access to a year of ephemeris data.

Highlights
  • AR celestial body positioning
  • Daily sun-moon position and planet rise/set
  • Catalog of stars, planets, and deep sky objects
  • Astronomical event calendar
  • Yearly ephemeris calculation
  • Constellation and star identification
Read full description

Astronomy Observer app is an app that help astronomical observers to arrange their observation plans reasonably.     Thanks to the improvement of the computing power of mobile phones and the application of new technologies (AR), it is possible to calculate the position of celestial bodies and the celestial ephemeris on the mobile phone, and AR can display the positions of celestial bodies.  The Astronomy Observer not only calculates the daily sun-moon position, planets rise and set, constellations, important stars, and messier objects which can be seen . In addition, various types of celestial bodies and important star catalogs are also collected, and the position, rise and set of each celestial body are calculated, and finally the ephemeris of the celestial body is calculated for one year. AR shows the constellation division, constellation position, star position, important star display, solar system celestial position.        The App is divided into the following parts 1. Daily: Daily twilight, moonrise and moonset, planets, and constellations, stars, messier 2. Browse: Browse constellations, stars, solar systems (sun, moon, planet, comet), deep sky objects (messier, galaxy, star clusters, nebulae), important star catalogs (HR, HD, HIP, SAO, CCDM, GCVS, TYChO, NGC) 3. Event: Calendar of astronomical phenomen 4. AR: AR shows the position of celestial bodies 5. Mine: 【Astronomy Observer Membership】 View all the celestial bodies catalog, One year ephemeris for all celestial bodies can be viewed, View AR images of any time,no ads Purchase rules: [Monthly Membership] Purchase a monthly member for $ 0.99 / month and renew it automatically every month. [Annual Membership] 4.99 $ / year to purchase annual annual membership and automatically renew it annually. [Lifetime Membership] $ 14.99, only need to purchase once, valid for life [Prices in different countries or regions should be converted according to the US dollar exchange rate] Purchase Notes: 1. The account will be automatically renewed and deducted the corresponding fee 1 day before the expiration. 2. If you need to cancel the renewal, please cancel in your personal iTunes account at least 1 day in advance. 3. After purchase, users can manage or turn off automatic renewal in personal account settings. Terms of Services : http://www.astronomyobserver.net/h5/astronomy/user/en Privacy policy: http://www.astronomyobserver.net/h5/astronomy/privacy/en

Screenshots

Zodiac Constellations Guide4 screens
Astronomy Observer4 screens

Verdict

The call

The clearest difference is rating: Astronomy Observer at 4.6 against Zodiac Constellations Guide's 4.0. Astronomy Observer also leads on update cadence (monthly vs every 24 months) and iOS requirement (11.0 vs 15.0). Zodiac Constellations Guide's advantage is in-app purchases (none vs 3). On price, review sentiment, ratings volume and ads 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. Astronomy Observer sells 3 in-app purchases, starting at $0.99 per month. Zodiac Constellations Guide asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Astronomy Observer holds the better App Store score, 4.6 against 4.0. Both are backed by a comparable volume of ratings — 38 and 28 respectively. Written reviews point the same way: 55% of Zodiac Constellations Guide's written reviews are positive against 58% of Astronomy Observer's.

UpkeepUpdate frequency

Zodiac Constellations Guide ships an update every 24 months, Astronomy Observer monthly. The most recent releases landed on October 22, 2026 and October 24, 2026 respectively.

Scorecard5 real differences · 5 level
Zodiac Constellations Guide versus Astronomy Observer: the parameters behind the verdict, then further details
ParameterZodiac Constellations GuideAstronomy Observer
PriceFreeFree
Rating4.0 (38 ratings)4.6 (28 ratings) — better
Positive reviews54.5% of reviews58.3% of reviews — better
Number of ratings38 — better28
Update frequencyEvery 24 monthsMonthly — better
AdsYesYes
In-app purchasesNo — betterYes
MonetizationAd-supported — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.011.0 — better
Further details — not scored
Size155 MB51 MB
Age rating4+4+
DeveloperVito Technology Inc.雪平 王

Customer experience

Zodiac Constellations Guide

All ratings38 ratings
Positive71.1%
Neutral10.5%
Negative18.4%
Written reviews11 reviews
Positive54.5%
Neutral27.3%
Negative18.2%

Astronomy Observer

All ratings28 ratings
Positive96.4%
Neutral0.0%
Negative3.6%
Written reviews12 reviews
Positive58.3%
Neutral8.3%
Negative33.3%

In-app purchases

None

Zodiac Constellations Guide

No in-app purchases

3 purchases

Astronomy Observer

Subscriptions2
  • Monthly membership$0.991 Month
  • Annually Membership$5.991 Year
One-time1
  • lifetime membership$14.99

Questions

Is Zodiac Constellations Guide free?
Zodiac Constellations Guide is free to download, with no in-app purchases.
Is Astronomy Observer free?
Astronomy Observer is free to download, with in-app purchases available.
Which has better reviews, Zodiac Constellations Guide or Astronomy Observer?
Astronomy Observer is rated higher. Zodiac Constellations Guide averages 4.0 out of 5 from 38 ratings, while Astronomy Observer averages 4.6 from 28 ratings.
Do Zodiac Constellations Guide or Astronomy Observer have ads?
Both Zodiac Constellations Guide and Astronomy Observer show ads.
Which is updated more often, Zodiac Constellations Guide or Astronomy Observer?
Zodiac Constellations Guide ships an update every 24 months, and Astronomy Observer monthly. Most recently, Zodiac Constellations Guide was updated on October 22, 2026 and Astronomy Observer on October 24, 2026.

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