Version 1.0 measured one field against the sky. The question the pilot cohort kept asking was whether the same instrument could measure two fields against each other. Version 2.0 answers it. The Entanglement takes a companion's birth details and maps the geometry between two natal charts — what flows easily, what asks for work — as a single interference pattern on the wrist. No account, no cloud, no fee. Nothing leaves the watch.
Synastry is not a forecast. It is the geometry of how two birth charts interlock — the aspects each set of points makes across the gap between them. AstroTeks reads that geometry the way the rest of the app reads the sky: it maps the picture and hands it to you. It does not tell you what will happen. The whole app is built on one sentence — mapped, not predicted — and synastry is held to the same line.
The natal engine was already real and already verified, so v2 reused it rather than reinventing it. On top of it sits a cross-aspect calculator that takes two charts and returns every aspect each set of points makes across the gap, weighted by exactness. A deliberate invariant holds the whole thing honest: the weave is symmetric — weave(A, B) equals weave(B, A) — so two people entering each other's data receive the same field, each as the other's inverse. The raw geometry collapses into two plain numbers, FLOW and CHARGE, and one of five verdicts: constructive, harmonious, dynamic, crosswind, quiet.
The nicest turn was the journal. Rather than dropping a list of aspects on the guest, the synastry reading is synthesized into a short written reflection and saved into the Lunar Journal — so it reads as though the journal received it from the sky, not as though an algorithm typed at you. You didn't write it; it was blessed in. You read it off your wrist like any other entry.
v2.0 was archived as build 3, validated, and submitted to the App Store on June 6, 2026. Same engine as the research paper below, now pointed at two people instead of one. Built on real on-device ephemeris — Standish (1992) Keplerian elements with Meeus algorithms, and ELP2000 lunar theory. Still mapped, still not predicted.