# Knowe Astro：Birth Chart vs Atrium Astrology

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.

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.

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.

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

## The numbers

| Metric | Knowe Astro：Birth Chart | Atrium Astrology |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/knowe-astrobirth-chart/id6752608152/reviews) | [5.0 (7 ratings)](https://appshunter.io/ios/app/atrium-astrology/id6766998998/reviews) |
| Number of ratings | 1 | **7** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 days | Every 4 days |
| Monetization | Freemium | Free with in-app purchases |
| Size | 22 MB | 30 MB |
| Requires iOS | 18.0 | **16.0** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [占辉 百](https://appshunter.io/developer/1081455103) | [SAMMA AI LLC](https://appshunter.io/developer/1896344787) |

## What reviewers say

### Knowe Astro：Birth Chart

[App page](https://appshunter.io/ios/app/knowe-astrobirth-chart/id6752608152)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Pro Membership | $4.99 | per month |
| Monthly Ultra Membership | $6.99 | per month |
| Yearly Pro Membership | $19.99 | per year |
| Yearly Ultra Membership | $29.99 | per year |


### Atrium Astrology

[App page](https://appshunter.io/ios/app/atrium-astrology/id6766998998)

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:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Reading | $2.99 | one-time |
| Family Pack | $9.99 | one-time |
| Pack of 10 unlocks | $19.99 | one-time |
| Pack of 25 unlocks | $39.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*