Comparison

Knowe Astro:Birth Chart vs Atrium Astrology

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

Head to head
About

Knowe Astro:Birth Chart

This app generates detailed natal charts, synastry comparisons, and transit readings. It offers AI-powered interpretations and includes a built-in astrology library for in-depth study. Ideal for both beginners and experienced astrologers seeking a clear workspace.

Highlights
  • Accurate natal and birth charts
  • Synastry and compatibility analysis
  • Transit tracking and timing
  • AI chart interpretation
  • In-app astrology library
  • Detailed placement study
Features
Read full description

Knowe Astro is a precise, focused workspace for people who want to understand natal charts, relationships, and transits beyond a generic horoscope. Enter a birth date, exact time, and place to create a complete chart. Read its overall structure, open every planet, sign, house, and aspect, save the people who matter, and move through time to follow changing transits. - A CLEAR, PRECISE BIRTH CHART Calculate planets, angles, houses, and aspects from the birth data and see the chart's essential structure in one readable view. - SYNASTRY AND COMPOSITE CHARTS Compare two charts through synastry to understand their astrological connections. Use a composite chart to explore the central themes of the relationship itself. - TRANSITS THROUGH TIME Change the date to inspect the planetary positions at that moment and the contacts they form with the natal chart. - AI INSIGHT GROUNDED IN THE ACTUAL CHART Generate an overall or monthly reading for the selected chart. The content is shaped by its specific astrological data rather than a generic Sun-sign template. - DETAILS THAT KEEP THEIR CONTEXT Open planets, signs, houses, and aspects one by one while keeping degrees, conditions, and relationships connected in the same reading flow. - ASTROLOGY LIBRARY AND HOME SCREEN WIDGETS Read classic astrology books inside the app and use Home Screen widgets to check current transits for the selected profile at a glance. Whether you are learning to read your first chart or already study astrology regularly, Knowe Astro gives you a calm, clear environment for going deeper. The transit timeline, in-depth chart details, widgets, and saved charts beyond the free limit require Pro or Ultra access. AI readings require an Ultra subscription. By using this app, you agree to Apple's Standard End User License Agreement (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Atrium Astrology

Explore your cosmic blueprint with AI-powered astrological insights. Get personalized birth chart interpretations, lifelong horoscopes, and real-time celestial updates. Understand yourself and your relationships through the wisdom of the stars.

Highlights
  • Interactive birth charts
  • Personalized interpretations
  • Lifelong horoscopes
  • Live transit map
  • Shared chart readings
  • AI-powered insights
Features
Read full description

Atrium brings ancient astrological wisdom directly to your pocket through interactive birth charts, deeply personalized interpretations, and real-time celestial insights - all wrapped in a beautiful and thoughtfully designed interface. By blending thousands of years of astrological tradition with the precision of astronomical science and advanced AI, Atrium provides a mirror for true self-discovery. For students of astrology, the app delivers highly precise technical details, empowering you to conduct deep research and craft your own readings. EVERYTHING UNDER THE STARS From daily guidance to deep chart analysis, Atrium is your all-in-one astrology companion. • The Report — Dive into a deeply personal narrative that decodes the most vital aspects of your chart, answering the question: who am I? • Interactive Birth Chart — Explore your astrological DNA in unprecedented depth. Tap any element for a fully customized, easy-to-understand interpretation. • Lifelong Horoscopes — Navigate your future with personalized horoscopes tailored to every year of your life, guiding you through what's coming next. • Live Transits — Watch the cosmos move. Our interactive transit map reveals exactly how real-time planetary shifts interact with your unique chart. • Shared Journeys — Add the people you love. Read their insights, explore their charts alongside yours, and deepen your relationships. SIMPLE, ONE-TIME UNLOCKS No subscriptions. Pay once for the readings you want, keep them forever, and receive ongoing updates to your personalized horoscopes. • Full Reading Unlock — Get unlimited access to every interpretation and horoscope for one person. • Family Pack — Unlock four full readings at a discounted price so you can explore the stars with friends and family. A MAP OF THE SOUL Atrium is built for those who use astrology to better understand themselves and the people they love. Whether you are looking for daily inspiration, deep reflection, or relationship insights, your cosmic blueprint is waiting. Begin your journey, and discover what the stars have written for you.

Screenshots

Knowe Astro:Birth Chart4 screens
Atrium Astrology4 screens

Verdict

The call

The clearest difference is ratings volume: Atrium Astrology at 7 against Knowe Astro:Birth Chart's 1. Atrium Astrology also leads on iOS requirement (16.0 vs 18.0). On price, rating, update cadence 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. Knowe Astro:Birth Chart sells 4 in-app purchases, starting at $4.99 per month and Atrium Astrology sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Knowe Astro:Birth Chart against 5.0 for Atrium Astrology. That said, the two scores are not equally well evidenced: Atrium Astrology has 7 ratings behind it against 1, so its average is the more settled of the two.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly every 4 days. The most recent releases landed on September 29, 2026 and October 9, 2026 respectively.

Scorecard2 real differences · 8 level
Knowe Astro:Birth Chart versus Atrium Astrology: the parameters behind the verdict, then further details
ParameterKnowe Astro:Birth ChartAtrium Astrology
PriceFreeFree
Rating5.0 (1 ratings)5.0 (7 ratings)
Positive reviews—100.0% of reviews
Number of ratings17 — better
Update frequencyEvery 4 daysEvery 4 days
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFree with in-app purchases
DevicesiPhone, iPadiPhone, iPad
Requires iOS18.016.0 — better
Further details — not scored
Size22 MB30 MB
Age rating4+12+
Developer占辉 百SAMMA AI LLC

Customer experience

Knowe Astro:Birth Chart

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Atrium Astrology

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

4 purchases

Knowe Astro:Birth Chart

Subscriptions4
  • Monthly Pro Membership$4.991 Month
  • Monthly Ultra Membership$6.991 Month
  • Yearly Pro Membership$19.991 Year
Show 1 more
  • Yearly Ultra Membership$29.991 Year
4 purchases

Atrium Astrology

One-time4
  • Full Reading$2.99
  • Family Pack$9.99
  • Pack of 10 unlocks$19.99
Show 1 more
  • Pack of 25 unlocks$39.99

Questions

Is Knowe Astro:Birth Chart free?
Knowe Astro:Birth Chart is free to download, with in-app purchases available.
Is Atrium Astrology free?
Atrium Astrology is free to download, with in-app purchases available.
Which has better reviews, Knowe Astro:Birth Chart or Atrium Astrology?
Knowe Astro:Birth Chart and Atrium Astrology are both rated 5.0 out of 5 on the App Store, from 1 and 7 ratings respectively.
Do Knowe Astro:Birth Chart or Atrium Astrology have ads?
Neither Knowe Astro:Birth Chart nor Atrium Astrology shows ads.
Which is updated more often, Knowe Astro:Birth Chart or Atrium Astrology?
Knowe Astro:Birth Chart ships an update every 4 days, and Atrium Astrology every 4 days. Most recently, Knowe Astro:Birth Chart was updated on September 29, 2026 and Atrium Astrology on October 9, 2026.

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