The app that helps you understand everyone in your life — your boss, your partner, your family. Powered by AI and grounded in Western tropical synastry.
Features
Not just your horoscope. Real tools for real conversations.
See people the way they want to be seen — and the way they actually are.
Paste a real conversation. We'll tell you what they'll say next — and why. Based on how your signs actually communicate, not generic horoscopes.
Save a guide for your boss, your partner, your roommate, your mom. Each one tells you exactly how to approach them, what to avoid, and why it works.
Not just a number. See exactly why you click with someone — or don't. Sun, Moon, and Rising compared side by side with plain-English explanations.
Astrology is better when it's shared.
Your companions text you. Based on their zodiac personality, they'll check in, share insights, and keep the conversation going — even when you forget to open the app.
Discover Simastry users with compatible signs. Browse privately or make yourself visible. When you find someone interesting, say hi — the conversation lands in your inbox.
Share your compatibility readings and prediction results on Instagram and TikTok. Every card is designed to make your friends download the app.
Small daily habits that compound into real understanding.
Build a habit. Open the app daily and watch your streak grow. Milestones at 7, 30, and 100 days.
Learn why astrology actually works through daily bite-sized insights tied to features you're already using. No jargon, no lectures.
After onboarding, we show you what your Sun sign says about you — in language that actually resonates. Every empty state, every notification, every tip is tailored to YOUR signs.
Community
Find people who get you. Connect on a level that goes deeper than a follow button.
Browse Simastry users with compatible signs. See who shares your communication style, your emotional wavelength, or your approach to conflict. When someone catches your eye, send a message — it lands right in their inbox.
You choose who sees you. Browse the community invisibly, or make yourself visible when you're ready. No pressure, no algorithms pushing you to connect.
Only your display name and signs are visible. Never your email, birth details, or location. We built this for safety from day one.
How It Works
No astrology knowledge needed. We do the heavy lifting.
We calculate your Sun, Moon & Rising signs. Don't know your birth time? That's fine — we'll estimate.
Get a personal insight about who you are and how you communicate. This isn't a generic horoscope.
Boss, partner, best friend, sister. Enter their birthday and instantly see how your signs interact.
Communication guides, prediction tools, and proactive messages from your companions — updated every day.
Share your readings, find compatible people, and build a streak that keeps you coming back.
Platform
Simastry meets you where you already are.
Lock Screen Widget
See your daily companion score without unlocking your phone.
Siri Shortcuts
“Hey Siri, how should I talk to a Scorpio?”
Three Languages
Available in English, Spanish, and Portuguese.
Pricing
No ads. No data selling. Just astrology that works.
Free
$0
forever
Plus
$6.99
per month
Pro
$14.99
per month
Methodology
We take astrology seriously and your privacy even more seriously.
One tradition, done rightWe don't mix astrological traditions. We don't generate generic horoscopes. Every insight traces back to a specific relationship between your sign placements.
Your birth data is never sold or sharedNo ads. No third-party data deals. Your information stays between you and Simastry. Period.
Built for everyday people, not astrology expertsYou don't need to know your Chiron from your North Node. We translate the cosmos into plain English.
Understanding, not controllingOur guides help you empathize, not manipulate. Better communication starts with genuine understanding.
Complements professional astrologersRecommended alongside human astrologers, not as a replacement. Think of us as your daily companion between sessions.
Transparent methodologyEvery reading shows which sign placements produced it. No black boxes, no mystery scores — just clear reasoning you can verify.
Get Started
Download Simastry and start communicating with clarity, empathy, and a little cosmic insight.
Download on the App Store