Saju brain map-style copycat

Public counter observed by a third party (AstroDir, morning of 11 Oct 2026): 536,676 brain maps generated (maps, not unique users). Self-reported by the operator (Naver Blog, 10 Oct 2026): one friend's X post reached 4.57M views and 25,000 reposts; 500,000+ maps; 10,000+ people on the site at once within 30 minutes; 73 reviews and 173 repeat purchases of paid readings in 7 days with no paid ads (AstroDir could not find the original post). Category benchmark, Self-reported via press (JoongAng Ilbo, 29 Sep 2026): peer site Saju Kid earns about ₩6bn a year from 990-won AI readings and claims 1.8M users. No revenue figure published for Hongsimdang. X: 63 posts/7d (Up 300% Wed→Mon (full UTC days: Wed 14 2 → Mon 19 8); peak Fri 16 16; Mon 19 is 50% below peak — ≥50% below peak: POP 5.3 window-closed signal; window 2026-10-13 10:30 UTC → 2026-10-20 10:00 UTC (Tue 13 Oct and Tue 20 Oct are partial UTC days; full days Wed 14 → Mon 19)). Revenue hypothesis: ~$3K–$9K/month at month 6 (HYPOTHESIS: 300k maps/month × 0.5–1.5% buyers × ~$2 per reading × 1.5 readings).

ter sex, birth date and optionally hour, with no account, and get an image that stacks your chart's "ten gods" balance as everyday preoccupations inside a cartoon head. You can send a link to a friend or partner; once they consent and add their own birth data you see how they read you and a compatibility score. The money comes from AI saju readings sold behind the free image (990 won each is the common price on sister site Saju Doryeong and peers). Why replicable: The product is one form, one chart calculation and one image template plus a consent-based invite link: a coding agent can build it in days. Virality comes from people posting their own image and inviting a partner, not from a founder on camera. Brazil and Spanish-speaking Latin America have a large astrology audience on X (2,577 Portuguese posts in 7 days, up 32%) and no brain-map clone was found in Portuguese or Spanish. Monetization: Free image; paid AI readings at a low price per reading (love, compatibility, career, year ahead) via Pix and cards; optional bundles. No subscription at launch. No approved price. Build: 1–2 agent-weeks (chart calculation from a public ephemeris library, PT/ES copy, image renderer, consent-based invite link, Pix and card checkout, AI reading generator with guardrails); stack: Next.js on Vercel; Swiss Ephemeris-compatible library; server-side image cards (OG); Postgres; Stripe plus a Pix provider; LLM for readings with fixed templates. faceless astrology personas on X, Instagram and TikTok; SEO/GEO pages per sign, ascendant and sign pair ("compatibilidade áries e escorpião").

on X (2,577 Portuguese posts in 7 days, up 32%) and no brain-map clone was found in Portuguese or Spanish.

aoTalk, Instagram and Threads; the category is stable to rising (Korean saju 2,574, up 17% Wed→Mon; Portuguese astrology 2,577, up 32%; English "saju" 3,132, down 22% Wed→Mon). Other X counts (same window, Verified X API): 2,574 posts: (사주 OR 궁합) -is:retweet lang:ko | 2,577 posts (Up 32% Wed→Mon (full UTC days: Wed 14 370 → Mon 19 488); peak Mon 19 488; Mon 19 is 0% below peak): ("mapa astral" OR "meu signo" OR ascendente OR "compatibilidade" OR "sinastria") lang:pt -is:retweet

Self-reported by the operator (Naver Blog, 10 Oct 2026): one friend's X post reached 4.57M views and 25,000 reposts; 500,000+ maps; 10,000+ people on the site at once within 30 minutes; 73 reviews and 173 repeat purchases of paid readings in 7 days with no paid ads (AstroDir could not find the original post). Category benchmark, Self-reported via press (JoongAng Ilbo, 29 Sep 2026): peer site Saju Kid earns about ₩6bn a year from 990-won AI readings and claims 1.8M users. No revenue figure published for Hongsimdang.