# Knowe Astro vs Celestium

Knowe Astro and Celestium are too close to call on the numbers: across 9 compared parameters — price, rating, ratings volume and update cadence among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Knowe Astro sells 4 in-app purchases, starting at $4.99 per month and Celestium sells 2 in-app purchases, starting at $6.99 per month. 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 against 5.0 for Celestium. Both are backed by a comparable volume of ratings — 2 and 4 respectively.

Knowe Astro ships an update every 8 days, Celestium every 5 days. The most recent releases landed on November 8, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Knowe Astro | Celestium |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (2 ratings)](https://appshunter.io/ios/app/knowe-astro-birth-chart/id6752608152/reviews) | [5.0 (4 ratings)](https://appshunter.io/ios/app/celestium-cosmic-compass/id6761672904/reviews) |
| Number of ratings | 2 | **4** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 8 days | **Every 5 days** |
| Monetization | Freemium | Freemium |
| Size | 23 MB | 146 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone, iPad | **iPhone, iPad, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [占辉 百](https://appshunter.io/developer/1081455103) | [Jhinna Salinas](https://appshunter.io/developer/1850224128) |

## What reviewers say

### Knowe Astro

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

Explore your birth chart with detailed analysis of planets, signs, houses, and aspects. Understand relationships through synastry and composite charts, and track transits over time. AI insights are grounded in your specific astrological data.

**Highlights:** Precise birth chart calculation, Synastry and composite charts, Transit tracking, AI-generated readings, Astrology library, Home screen widgets

**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 |


### Celestium

[App page](https://appshunter.io/ios/app/celestium-cosmic-compass/id6761672904)

Explore personalized astrological insights for life's decisions. Discover ideal locations for love, work, and growth, and understand daily cosmic weather. Engage in guided rituals and connect with others through shared astrological charts.

**Highlights:** Location scoring for love, work, vitality, and growth, Daily cosmic weather and moon phase tracking, Guided rituals for moon phases, Couples and group chart analysis, On-device chart computation with no tracking, AI interpretations via user's Anthropic API key

**Features:** Family Sharing, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Monthly | $6.99 | per month |
| Premium Yearly | $42.99 | per year |


## Frequently asked questions

### Is Knowe Astro free?

Knowe Astro is free to download, with in-app purchases available.

### Is Celestium free?

Celestium is free to download, with in-app purchases available.

### Which has better reviews, Knowe Astro or Celestium?

Knowe Astro and Celestium are both rated 5.0 out of 5 on the App Store, from 2 and 4 ratings respectively.

### Do Knowe Astro or Celestium have ads?

Neither Knowe Astro nor Celestium shows ads.

### Which is updated more often, Knowe Astro or Celestium?

Knowe Astro ships an update every 8 days, and Celestium every 5 days. Most recently, Knowe Astro was updated on November 8, 2026 and Celestium on October 31, 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.*