Comparison

Knowe Astro vs Celestium

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

Head to head
About

Knowe Astro

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
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

Celestium

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
Read full description

Celestium isn't a horoscope written for millions at once. It's your actual birth chart, the real sky of the moment you were born, read alongside the traditions that have studied the sky longest. A compass through life, not a crystal ball. YOUR SKY REPORT Each New Moon, a report gathers what you wrote, the sky it met, the patterns that keep coming back, and what returns next. A Yearly report arrives at your solar return. Tell it "This landed" or "Not me" and it listens. The report and everything you wrote are free. THE TRADITIONS Western astrology from Hellenistic to modern, Vedic charts, BaZi, the Maya Tzolkin, Tibetan astrology, the Tong Shu almanac, Feng Shui flying stars, Hermetic Qabalah with your tarot birth cards, numerology, tarot and the I Ching. Choose the ones that speak to you; the app follows your choice. YOUR OWN RECORD Journal, check in, and edit any entry later. Each entry keeps the sky it was written under, so when that sky returns you can see what you wrote last time. Tag by feeling, milestone and tradition, and related entries gather into threads. YOUR CHART, PIECE BY PIECE Blueprint teaches each placement, angle and aspect, then asks you to name how it lives in you, until it is yours and not just words on a page. WHERE YOU THRIVE Your chart mapped onto the whole planet. Score thousands of cities for love, work, vitality and growth, compare them side by side, and trace the Lots too, Fortune, Spirit and six more. WHEN TO ACT Daily sky, moon phases and the transits touching your chart, from today out to the year. Electional timing reads three ways, Medieval, Hellenistic and Vedic, with the conditions each tradition names. A FULL READING, NO AI NEEDED A complete natal reading composed on your device from a deep interpretation library. Optional AI interpretations work with your own Anthropic API key, so your chart goes straight to Anthropic, never through us. SHOWS ITS WORK Every technique names its sources: the tradition, the text it rests on, and the method behind the number. Zodiacal releasing, firdaria, profections, returns, horary, progressions, solar arc, BaZi, Vedic, Feng Shui, the Maya Tzolkin, numerology, Hermetic Qabalah and tarot all cite the lineage they come from. RITUAL, DIVINATION AND SKY LETTERS Guided practices for each moon phase. Draw a tarot spread or cast the I Ching. Seal a letter to a later self under tonight's sky; it opens when the moment you choose returns. TOGETHER Synastry, composite and the places that hold you both, or group mode for three to six. Invites are encrypted end to end. REAL ASTRONOMY, NOTHING LINKED TO YOU Positions come from a built-in VSOP87 engine, not a borrowed API. Your chart is computed on your device. There is no account, nothing the app collects is linked to you, and Settings can erase everything. Celestium Premium opens the full app: unlimited saved charts, couples and group mode, the full city atlas, export and shareable cards, deeper Sky Reports, and the full depth of Blueprint, your reading and the year ahead. Subscribers can also use Premium on the web. Astrology here is for reflection, not prediction. A way to read the weather instead of a forecast you have to obey. If you have any issues please reach out to us at jhinna@withjhinna.com Privacy Policy: https://celestium.me/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Knowe Astro4 screens
Celestium4 screens

Verdict

The call

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.

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 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.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

ScorecardNo meaningful differences
Knowe Astro versus Celestium: the parameters behind the verdict, then further details
ParameterKnowe AstroCelestium
PriceFreeFree
Rating5.0 (2 ratings)5.0 (4 ratings)
Positive reviews—100.0% of reviews
Number of ratings24 — better
Update frequencyEvery 8 daysEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPadiPhone, iPad, Mac — better
Requires iOS18.017.0 — better
Further details — not scored
Size23 MB146 MB
Age rating4+4+
Developer占辉 百Jhinna Salinas

Customer experience

Knowe Astro

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

Celestium

All ratings4 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

4 purchases

Knowe Astro

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
2 purchases

Celestium

Subscriptions2
  • Premium Monthly3 Days trial$6.991 Month
  • Premium Yearly3 Days trial$42.991 Year

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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