Updated October 2026 · facts checked 2 October 2026
How we tested (October 2026)
For a birth chart app, the useful questions are what the free chart shows, what you pay to go deeper, and whether a person or an AI writes the interpretation. That is what this table compares.
- What we checked: each app's current US App Store listing on 2 October 2026: the features it describes, the in-app prices it shows, what its free tier includes, and whether people or AI write the readings. For AskSoma we used our own pricing page.
- What we did not do: buy every subscription, score prediction accuracy (none of these apps has published an independent accuracy test), or rank by star ratings, app reviews or Reddit discussions. Read recent reviews and Reddit threads for that side.
- Prices: US App Store prices as listed, before tax. Android and web prices can differ and listings change, so check before you subscribe.
- Disclosure: AskSoma publishes this page and makes the AskSoma app.
Birth chart apps side by side: verdict table (2026)
Apps are listed alphabetically. “Best for” is our one-line summary of what each listing emphasises, not a score.
| App | Best for | Free tier | Paid options (US, 2 October 2026) | Who writes the readings |
|---|---|---|---|---|
| AskSoma | Reading your Western chart first, with the sidereal second layer side by side, then asking questions about it | Birth chart with your Sun, Moon and Rising; 3 free questions to Soma on day 1, then 1 a day | Pro $14.99/mo, $59.99 for 6 months or $99/yr; day pass from $2 (web prices on asksoma.ai/pricing) | AI (Soma), reading a chart computed with Swiss Ephemeris; it says it is AI |
| CHANI | Learning each planet's role in your chart, with weekly personal readings | Free download; the subscription is offered with a trial | $11.99/month or $107.99/year | Human astrologers; the listing says “not AI” |
| Co-Star | Learning to read your whole birth chart and comparing charts with friends | Daily horoscopes, your birth chart and friend compatibility | Pro-Star $8.99/month; question packs from $2.99; Your Year Ahead $11.99 | Human astrologers working with AI technology, per the listing |
| Nebula | A birth chart reader alongside tarot and palm readings | Free download | Premium options listed from $2.99 to $49.99 (billing period not shown); chat balance $9.99 | Live chat with human advisors; AI use not stated |
| Sanctuary | An interactive birth chart plus live readings with professional astrologers | Free download | Sanctuary+ $14.99/month or $49.99/year; intro readings from $4.99 | Live human readers; the listing says “not algorithms” |
| The Pattern | A personality-first reading of your chart (“Your Pattern”) | Free download | Go Deeper+ $14.99/month, $29.99/quarter or $83.99/year | — |
| TimePassages | Chart detail: transits, progressions and solar arc charts | Birth chart and daily horoscope, which the listing says are always free | Pro $7.99/month; single charts $0.99; all-natal-charts pass $9.99 | Human astrologers; the listing says “Not AI” |
— = not stated on the listing. Sources: US App Store listings for CHANI, Co-Star, Nebula, Sanctuary, The Pattern and TimePassages, and asksoma.ai/pricing, all checked 2 October 2026.
Where AskSoma fits: it reads your Western chart first (Sun, Moon and Rising), with the sidereal (Vedic) chart as a second layer, so you see Western & sidereal side by side. You can try that on the free birth chart calculator, then chat with an AI astrologer about your own chart. Soma is AI, not a human astrologer, and we make AskSoma.
How We Ranked These Birth Chart Apps
A birth chart is more than your Sun sign: it maps every planet, house and aspect at the moment you were born, and the quality of that map decides the quality of every reading built on it. We ranked the seven apps and sites below on five criteria, using each one's current US App Store listing or website (checked 2 October 2026), as described in the How we tested box above.
First, chart calculation: whether the app says which astronomical ephemeris it uses, such as Swiss Ephemeris. Second, interpretation depth: how many planets, houses, aspects and special points it explains, and whether the readings respond to your whole chart or are fixed text per placement. Third, chart visualisation: how clearly the chart is drawn and which chart styles are offered. Fourth, interactivity: whether you can ask questions about your chart or only read a static report. Fifth, value: what the free tier includes and what paid plans cost.
The rank order is our editorial judgement on those criteria, not a measured accuracy score and not a star rating. The verdict table above covers App Store apps; this list also includes two free websites, Astro.com and Cafe Astrology, because many people make their first birth chart there. We make AskSoma, so weigh our placement of it accordingly.
The 7 Best Birth Chart Apps — Ranked
AskSoma — Best for Asking Questions About Your Chart
AskSoma calculates your birth chart with Swiss Ephemeris and pairs it with Soma, a conversational AI astrologer. It reads your Western chart first (your Sun, Moon and Rising), with the sidereal (Vedic) chart as a second layer, so you can see both side by side. The sidereal layer adds Vedic tools such as Nakshatras and Dasha periods.
The difference from a static report is what happens after the chart is drawn: you can ask follow-up questions such as "What does my Moon in Rohini Nakshatra mean for my emotional life?" or "How does my Saturn Mahadasha affect my career?" and get answers about your own chart, by text or voice. Soma covers 30+ life areas, from career and relationships to health and timing. Soma is AI, not a human astrologer.
The app is available in 21+ languages. Chart math runs in your browser; your birth details are saved to your account and chat is processed on AskSoma's servers. The free tier includes your birth chart with your Sun, Moon and Rising, plus 3 free questions to Soma on day 1 and then 1 a day. Pro is $14.99/month, $59.99 for 6 months or $99/yr, and a day pass starts from $2 (web prices on asksoma.ai/pricing, 2 October 2026). Monthly Pro includes a set number of Soma messages each billing cycle rather than open-ended chat.
Why it is first on our list: it is the only app here that combines a Swiss Ephemeris chart, Western and sidereal layers side by side, and open-ended AI chat about your own chart by text or voice. We make AskSoma, so check the free tier and decide for yourself.
Pros
- Swiss Ephemeris planetary calculations
- Western chart first, with the sidereal (Vedic) layer side by side
- Conversational AI answers questions about your chart, by text or voice
- 21+ languages
- Nakshatra, Dasha and transit analysis included
- Free tier: birth chart plus 3 questions on day 1, then 1 a day
Cons
- Readings are written by AI, not a human astrologer
- Monthly Pro has a message allowance per billing cycle
- Newer app, smaller community than Co-Star
Co-Star — Best Social Birth Chart Experience
Co-Star made natal charts a social activity. It draws Western tropical birth charts in a sleek, minimalist design and writes brief, punchy interpretations in a direct, sometimes provocative style. Its App Store listing says readings are written by human astrologers who work with AI technology, and that it uses NASA data to chart planetary positions (Co-Star's own description, checked 2 October 2026).
The social features are where Co-Star stands out: you can add friends, compare natal charts and see your compatibility, and receive daily push notifications based on your chart. The listing also describes learning to read your entire birth chart. Interpretations stay short compared with dedicated chart tools; as of October 2026 you can ask the app questions through paid question packs, but there is no open-ended chat about your chart.
Daily horoscopes, your birth chart and friend compatibility are free. Pro-Star is $8.99/month, question packs start at $2.99 for 5 questions, and Your Year Ahead is $11.99 (US App Store, 2 October 2026). For a visually appealing Western natal chart with strong social sharing, Co-Star delivers well. It has no sidereal (Vedic) option.
AskSoma vs Co-Star →TimePassages — Best for Chart Students & Enthusiasts
TimePassages, from AstroGraph Software, has been a trusted name among astrology students since 2012, and its birth chart tools reflect that. It draws detailed Western natal charts with planet-by-planet interpretations that explain what each placement means in the context of the whole chart. Its listing says every interpretation is written by experienced human astrologers, "Not AI".
Beyond the natal chart it covers transits, progressions, solar arc directions, and synastry and composite charts for relationships, which makes it an excellent learning tool for people who want to understand the mechanics behind their readings. As of 2 October 2026 the birth chart and daily horoscope are free; Pro is $7.99/month, and single charts cost $0.99 each (US App Store). There is no AI chat, no voice feature, and the listing does not mention a sidereal (Vedic) option. For dedicated Western chart study, TimePassages remains a strong contender.
AskSoma vs TimePassages →Astro.com — Best Free Professional Chart Generation
Astro.com is one of the longest-running free birth chart sites, used by professional astrologers worldwide. It is run by Astrodienst, the same company that developed the Swiss Ephemeris calculation engine. Its Extended Chart Selection lets you choose house systems (Placidus, Whole Sign, Equal, Koch and more), switch between tropical and sidereal zodiacs, add asteroids, and draw natal, synastry, composite and solar return charts.
Its free horoscopes include a free try-out edition of Liz Greene's Psychological Horoscope, one of the best-written interpretations in astrology; the full reports are paid. The website design is dated and not built for phones, and when we checked on 2 October 2026 we found no Astrodienst app on the US App Store. There is no AI interaction and no way to ask follow-up questions about your chart. For professional astrologers and serious enthusiasts who need maximum chart customisation for free, Astro.com remains unmatched in scope; beginners who want a guided experience may prefer a modern app.
AskSoma vs Astro.com →
Chani — Best Written Birth Chart Interpretations
The CHANI app, from astrologer Chani Nicholas's company, offers Western birth chart analysis with exceptionally well-written interpretations. The prose is thoughtful, empowering and inclusive. You can explore each planet and point in your birth chart, see how their positions and relationships play out in your life, and read your natal placements' gifts and challenges. Its listing says the app is made by real astrologers, "not AI".
CHANI makes complex astrology accessible through warm writing, with daily horoscopes, weekly personal readings, transit readings, meditations and courses. As of 2 October 2026 the subscription is $11.99/month or $107.99/year on the US App Store, with a trial offered. The app is Western-only with no Vedic option and has no AI chat or voice consultations. For elegant writing and a feminist, inclusive approach to your Western natal chart, CHANI is excellent; for interactive questions or a sidereal chart, look elsewhere.
AskSoma vs Chani →Horos — Best Minimalist Birth Chart App
Horos takes a clean, minimalist approach to birth chart apps. The interface presents your natal chart and daily horoscope without clutter, and it suits users who want a calm, focused birth chart reading without the noise of larger social platforms.
As of 2 October 2026 its App Store listing describes a complete natal chart broken down into plain-language insights, a live transit tracker, personalised daily horoscopes, profiles for friends and family, and an AI astrology assistant you can chat with about your chart. It is free to download, with Horos Premium listed at $24.99 (billing period not shown on the listing). The listing does not mention a sidereal (Vedic) option. Horos works best as a simple daily companion for casual astrology enthusiasts who appreciate clean design.
AskSoma vs Horos →
Cafe Astrology — Best for Quick Free Chart Lookups
Cafe Astrology is a long-standing website that offers free birth chart generation with interpretations, along with a large library of educational content on planets, signs, houses and aspects. Many people get their first birth chart reading here.
Its free natal chart report lists planet signs, house positions and aspects, lets you compare house systems (Placidus by default), and includes interpretations written by the site's astrologer, Annie (checked 2 October 2026). They are not as deep as Astro.com's Liz Greene reports or as polished as CHANI's prose, but they are solid and informative for free content. The drawbacks are the ad-supported pages, the dated web design, and the absence of a mobile app (we found none on the US App Store on 2 October 2026) or interactive features. There is no AI and no way to ask questions about your results. For a quick, free birth chart lookup with no account needed, Cafe Astrology serves its purpose well.
AskSoma vs Cafe Astrology →Birth Chart App Comparison Table
Same seven apps, in rank order. Prices are US App Store or website prices checked 2 October 2026, before tax; they change, so check before you subscribe.
| App | Zodiac | Ask questions about your chart | Who writes the readings | Price (2 October 2026) |
|---|---|---|---|---|
| AskSoma | Western first, sidereal (Vedic) second layer | ✓ AI chat, text or voice | AI (Soma) | Free tier; Pro $14.99/mo, $59.99/6 mo or $99/yr; day pass from $2 |
 Co-Star |
Western (tropical) | Paid question packs | Human astrologers working with AI technology (per listing) | Free; Pro-Star $8.99/mo; questions from $2.99 |
| TimePassages | Western (tropical) | ✗ | Human astrologers (“Not AI”, per listing) | Free chart; Pro $7.99/mo; single charts $0.99 |
| Astro.com | Tropical or sidereal (you choose) | ✗ | Named astrologers (e.g. Liz Greene) | Free charts; paid full reports (website) |
 Chani |
Western (tropical) | ✗ | Human astrologers (“not AI”, per listing) | $11.99/mo or $107.99/yr |
| Horos | Western | ✓ AI assistant | Not stated | Free; Horos Premium $24.99 (period not shown) |
 Cafe Astrology |
Western (tropical) | ✗ | The site's astrologer, Annie | Free (ad-supported website) |
What Makes a Great Birth Chart App?
Understanding your birth chart is the foundation of any meaningful astrological practice, and the app you choose to generate and interpret that chart matters. A birth chart, also known as a natal chart, is a snapshot of the sky at the exact moment and location of your birth. It maps the positions of the Sun, Moon and planets across the zodiac signs and houses, creating a cosmic blueprint that astrologers interpret to understand personality, life path, relationships, career and the timing of major life events.
The precision of the underlying astronomical calculations is the foundation of any birth chart app. Even small errors in planetary longitude can change sign boundaries, house placements and aspect patterns. Professional-grade apps use an established astronomical ephemeris; Swiss Ephemeris, developed by Astrodienst and widely used in astrological software, is designed for astrological calculations spanning thousands of years, which matters for Vedic techniques like Dasha calculations that project decades into the future.
Beyond calculation, the interpretation is what turns numbers into meaning. Many apps rely on pre-written text blocks assigned to each placement, for example a paragraph about "Moon in Taurus" or "Venus in the 7th House". These can be informative, but they miss the synthesis that makes astrology useful: how your Moon in Taurus interacts with your Venus, your Saturn and the current transits. This is where apps with AI chat, such as AskSoma and now Horos, take a different approach: instead of isolated text blocks, you ask about the part of your chart you care about and get an answer in context.
Pro tip: When choosing a birth chart app, prioritize interpretation depth over visual design. A beautifully rendered chart wheel means little if the app cannot explain what your T-square or Stellium means for your daily life. The best apps combine accurate calculation engines with clear, contextual interpretation — and ideally let you ask follow-up questions.
Vedic vs. Western Birth Charts: Which Should You Choose?
One of the most important decisions when choosing a birth chart app is whether you want a Vedic (sidereal) or Western (tropical) chart. The Western system, used by popular apps like Co-Star and CHANI, is based on the tropical zodiac, which starts Aries at the Spring Equinox. The Vedic system, used by traditional Jyotish apps, uses the sidereal zodiac aligned with the constellations. Because of the precession of the equinoxes, there is currently about a 24-degree difference between the two systems, so your planetary signs will often differ between them. AskSoma shows both: your Western chart first, with the sidereal chart as a second layer.
Neither system is objectively better — they are different frameworks with different strengths. Vedic astrology offers predictive tools like Nakshatra (lunar mansion) analysis, Dasha periods (planetary time cycles spanning decades) and Yogas (planetary combinations with specific meanings) that have no direct equivalent in Western astrology. Western astrology has a deep psychological tradition and is what most popular apps use. Seeing both side by side, as AskSoma does, lets you compare without needing technical Jyotish knowledge.
Why Interactive Chart Reading Matters
The traditional model of birth chart interpretation, a static report, has a limitation. Every person reads their chart with specific questions in mind. One person wants to know about career timing. Another wants relationship insights. A third is concerned about health periods. A static report addresses predetermined topics in a predetermined order and can leave your actual question unanswered.
Interactive chart reading, as offered by AskSoma's Soma, lets you direct the conversation toward what matters most to you. Ask about your current Dasha period's impact on finances, then follow up about when the next favorable period begins. Or dive into your 7th house and how it interacts with your Venus placement for relationships. This conversational approach is the main reason we put AskSoma first in this list; if you prefer human-written prose, TimePassages and CHANI are the stronger picks.
Key Takeaway
Start with your Western (tropical) birth chart: AskSoma shows your Sun, Moon and Rising first and adds the sidereal (Vedic) chart as a second layer, both calculated with Swiss Ephemeris. If you want written interpretation of a Western chart, TimePassages and CHANI are strong picks; if you want to ask questions about your own chart, AskSoma and Horos both offer AI chat. Whichever app you choose, an exact birth time is what makes the Rising sign and houses reliable.
Stories from the other side of the chat
"Finally, an app that gets it right! AskSoma provides incredibly accurate information, Thank you so much soma. I'm so glad i came across soma, a huge thanks to soma creators and i hope they keep providing such wonderful and accurate messages."
"it gives very accurate readings even without having much details from my end. the timelines that were given are very accurate too and it even said things about my past years which were not even disclosed by me."
"Ask Soma is expert in astrology and their prediction is too good. When I ask them any specific question they gave to the point answer and no irrelevant answers. So hoping to know more about my future through ask Soma."
"Ask Soma AI is incredibly intuitive, fast, and helpful! Loved the accurate responses and smooth experience. A great AI assistant for everyday queries and support. Highly recommended! Thank you so much. Very intuitive."
See your birth chart in plain English — free
Sidereal Moon sign snapshot · save your full reading · chat with Soma about timing and life areas.
- Free Vedic birth chart calculated with Swiss Ephemeris
- Save your chart and chat history across devices
- 3 free Ask Soma messages on day 1, then 1 per day
- No credit card required
Frequently Asked Questions
AskSoma calculates with Swiss Ephemeris, an astronomical ephemeris widely used in astrology software, and shows your Western (tropical) chart first with the sidereal (Vedic) chart as a second layer. Co-Star says it uses NASA JPL data for Western tropical accuracy . Both are astronomically precise; the key difference is the zodiac system and interpretation depth. AskSoma adds conversational AI that lets you ask questions about your own chart; Horos also has an AI assistant, and Co-Star sells question packs (listings checked 2 October 2026).
You need three pieces of information: your exact date of birth, your time of birth (as precise as possible — check your birth certificate), and your place of birth. The birth time is especially critical because it determines your Ascendant (Rising sign) and house placements, which change roughly every two hours. Without an accurate birth time, any chart app will produce incomplete or potentially inaccurate results for houses and the Ascendant.
Yes — most reputable birth chart apps use professional-grade ephemeris data for planetary calculations. AskSoma, Astro.com, and Co-Star all provide astronomically accurate chart calculations in their free tiers. The key difference between free and paid is the depth and quality of interpretation, not the chart accuracy itself. AskSoma's free tier includes a few AI questions about your chart: 3 on day 1, then 1 a day.
A Vedic birth chart (Kundli) uses the sidereal zodiac aligned with actual star positions, while a Western chart uses the tropical zodiac tied to seasonal equinoxes. Your Vedic placements will typically differ by about 23-24 degrees from Western placements. Vedic charts also include Nakshatras (27 lunar mansions), Dashas (planetary period systems), and Yogas (planetary combinations) that have no Western equivalent. AskSoma gives you a Western birth chart with the sidereal (Vedic) second layer; Co-Star and Chani provide Western charts.
They do different jobs. An AI astrologer like AskSoma's Soma answers questions about your own chart across 30+ life areas, at any hour, and you can keep asking follow-ups. A human astrologer brings judgment, experience and empathy that matter most for complex personal situations. Many people use an AI app for everyday chart questions and book a human astrologer for big decisions; neither replaces professional medical, legal or financial advice.
The Verdict: AskSoma Leads for Birth Chart Depth
If you want a precise, deep, and interactive birth chart experience today, AskSoma is our pick on these criteria. Swiss Ephemeris precision, conversational AI interpretation, voice consultations, 30+ life areas, and 21+ languages — all for less than the cost of a single human astrologer session per month. Horos also has an AI assistant and Co-Star sells question packs, so weigh those if conversation is what you want.
Free birth chart • No credit card required