C3 vs Human Design Core
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
C3
This app offers relationship insights based on Western astrology, presented as data about communication and behavior. It provides psychological profiles, compatibility breakdowns for various connection types, and daily mood check-ins. The focus is on grounded, plain-language analysis rather than fate or mysticism.
- Psychological profile from birth chart
- Compatibility analysis for friendship, dating, business, creative
- Side-by-side chart comparison
- Daily mood check-in and private journal
- Compatibility reports for anyone
- AI-powered cosmic guide
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C3 is relationship intelligence, not a horoscope app. It reads Western astrology the way a behavioral scientist would: as data about how people communicate, make decisions, handle friction, and build trust. Then it translates all of it into plain, grounded language. No fate. No soulmates. No mysticism. Just a sharper read on the people in your life and the ones you're about to meet. WHAT YOU GET • Your Blueprint. A psychological profile built from your birth chart. Your patterns, your blind spots, and how you operate under pressure, in words instead of symbols. • Discover & Orbit. Meet people across four kinds of connection: Friendship, Dating, Business, and Creative. Every match comes with a behavioral breakdown of why you'd click and where you'd rub. • Compare. Put two charts side by side and see how your placements meet someone else's across every planet and house. You get plain-language reads on where you click and where you'll rub, for anyone you connect with or run a report on. • Daily Pulse. A short, honest read on the day's energy, a mood check-in, and a private journal. Built for reflection, not doomscrolling. • Reports. Run a compatibility read on anyone, even if they're not on C3. Enter a birth date and get the same grounded analysis. • Cosmic Guide. An AI that knows your chart and talks like a thoughtful friend, not a fortune teller. LOW-PRESSURE BY DESIGN Every action is a clear, tappable choice. No forced swiping, no games, no dark patterns. YOUR DATA STAYS YOURS Birth details are sensitive, and we treat them that way. Encrypted, separated from your identity, and never sold. Delete your account and everything goes with it. C3 is 18+ Terms of Use (EULA): https://joinc3.app/eula Privacy Policy: https://joinc3.app/privacy
Human Design Core
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You were born with a design. This app reads it. Human Design is a system that maps your birth moment onto a chart called the Bodygraph — a blend of astrology, the I Ching, and a handful of other older maps. Human Design Core turns your birth date, time, and place into that chart with real astronomical precision, then gives you a clear, unhurried way to read it. No jargon wall, no purple mysticism. Just your chart, laid open. YOUR CHART Enter your birth data and get your full Bodygraph in seconds. See your Type and Strategy, your Authority, your Profile, your defined and open Centers, and the Channels and Gates that connect them. Each part is explained on its own terms — skim the whole, then tap into any piece for the depth. The reading opens further as your membership does, from a foundation everyone can read to the fine detail of every gate and variable. Save the people who matter to you and switch between their charts at will. TODAY The sky keeps moving after you're born. The Today tab reads the current transit against your own chart — the planetary activations coloring the day — and pairs it with a plainspoken daily line written for you, not for everyone. Step a few days in either direction to see what's shifting, or hold on today and just sit with it. CONNECTION Bring two charts together. Human Design Core composes a shared Bodygraph for any pair, shows the channels that form between the two of you, names the shape of the connection, and reads how the two designs actually meet — where they complete each other, where they rub. Share the result as a card, or invite the other person to see their side of it. MEMBERSHIP, PLAINLY The core is free and stays free: your Bodygraph foundation and Profile, the daily transit for today and a few days around it, the connection graph, and shareable cards. Every new account also gets seven days of Practitioner-level access, so you can read the deeper layers before deciding anything. Practitioner (€6.99/month or €54.99/year) opens the detailed reading of your Centers, Channels, Gates, and Variables, unlimited transit dates, the full connection reading, and a larger chart library. Analyst (€14.99/month or €89.99/year, with a 7-day free trial) adds the fullest depth of reading and includes PDF report generation. We don't claim to be the biggest or the best. We built the chart we wanted to read, and priced it so the deep end stays reachable. PERSONAL REPORTS Turn any chart — your own or a couple's — into a composed PDF report, delivered to your account to keep. Rather not subscribe? Buy reports on their own: one, three, or five at a time. Enter a single date and see for yourself. No account needed to draw your first chart, and no credit card to begin. Terms of Use (EULA): https://www.humandesigncore.com/terms Privacy Policy: https://www.humandesigncore.com/privacy
Screenshots
Verdict
The clearest difference is update cadence: Human Design Core at every 8 days against C3's every 3 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. C3 sells 2 in-app purchases, starting at $7.99 per month and Human Design Core sells 7 in-app purchases, starting at $6.99 per month. Whichever you choose, the download price is not the number that matters.
C3 ships an update every 3 weeks, Human Design Core every 8 days. The most recent releases landed on October 22, 2026 and October 25, 2026 respectively.
| Parameter | C3 | Human Design Core |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 3 weeks | Every 8 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.6 — better | 16.4 |
| Further details — not scored | ||
| Size | 26 MB | 59 MB |
| Age rating | 17+ | 4+ |
| Developer | C3 Cosmic Connections LLC | Gyuchul Moon |
In-app purchases
C3
- C3 Catalyst Premium Monthly$7.991 Month
- C3 Premium - Annual$74.991 Year
Human Design Core
- Practitioner Monthly$6.991 Month
- Analyst Monthly$14.991 Month
- Practitioner Annual$54.991 Year
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- Analyst Annual$89.991 Year
- Report Credit$11.99
- Report Credits x3$32.99
- Report Credits x5$49.99









