Celestium vs Quiet Sky
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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/
Quiet Sky
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Quiet Sky is a calm, precise horoscope app for people who actually read charts. Instead of generating fortune text, it calculates planetary positions, aspects and houses accurately and leaves the reading to you. THE SKY NOW • The current planetary positions on a chart wheel • Step time forward or back by a minute, an hour, a day, a week or a month • Tables of positions, aspects and houses • Retrograde planets and daily motion • Any place and time zone in the world NATAL CHARTS • Create a chart from a name, birth date, birth time and birthplace • Search 4,169 built-in cities or enter coordinates directly — no connection needed • Unknown birth time is never replaced with noon: you get the planets and how far each moves that day • House systems: Placidus, Koch, Whole Sign, Equal, Campanus, Regiomontanus • Adjustable orbs UNLOCK EVERYTHING (ONE-TIME PURCHASE) • Transits: a bi-wheel with any date's planets around the natal chart • Analysis: essential dignities, chart shape and element balance • Returns: solar returns, lunar returns and planetary synodic cycles • Synastry: bi-wheels, aspect grid and composite charts for two people • Save as many charts as you like Not a subscription. Buy once and you will never be charged again. Every locked feature explains what it does before you buy. FREE • The whole Sky screen • One saved chart with its wheel, positions, aspects and houses ACCURACY Positions are apparent positions including aberration and nutation, in the tropical zodiac. The validated range is 1900–2100, and results are checked against published reference values to within one arcsecond. PRIVACY • No account, no ads, no tracking • The only network use is App Store purchase and restore • Charts are saved as JSON files in the "Quiet Sky" folder of your iCloud Drive, visible in the Files app and synced across devices (stored on the device if iCloud is off) iPhone and iPad. English and Japanese.
Screenshots
Verdict
The clearest difference is update cadence: Celestium at every 5 days against Quiet Sky's every 2 weeks. On price, ads, in-app purchases and device support 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
Both are free to download. Celestium sells 2 in-app purchases, starting at $6.99 per month and Quiet Sky sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.
Celestium ships an update every 5 days, Quiet Sky every 2 weeks. Both last shipped on October 31, 2026.
| Parameter | Celestium | Quiet Sky |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (4 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 5 days — better | Every 2 weeks |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Freemium | — |
| Devices | iPhone, iPad, Mac — better | iPhone, iPad |
| Requires iOS | 17.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 146 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Jhinna Salinas | Fumiya Sekiguchi |
In-app purchases
Celestium
- Premium Monthly3 Days trial$6.991 Month
- Premium Yearly3 Days trial$42.991 Year
Quiet Sky
- Unlock All Features$9.99









