An offline astrology app — no ads, no account

Planetary Explorer computes a complete birth chart on your device. Nothing is uploaded, nothing is sold, and there is no sign-up.

What the chart engine does

• Ascendant, Midheaven and twelve house cusps in Placidus, whole sign, equal or Porphyry
• All planets with sign, degree and retrograde state, plus the lunar nodes and Chiron
• Aspects, an aspect grid, and aspect patterns (Grand Trine, T-Square, Grand Cross, Yod)
• Element and modality balance, hemispheres, chart shape and essential dignities
• Fixed-star contacts, midpoints and the classical Arabic parts
• Synastry (two charts), transits, progressions and the solar return
• Tropical, sidereal (five ayanamsas), Vedic nakshatras and Chinese zodiacs

Why offline matters for astrology

Birth data is personal. An app that computes locally does not need to hold your date, time and place on a server — because it never leaves your device.

And it is a planetarium too

The same app charts the real sky: 41,411 stars, all 88 constellations, a deep-sky catalogue, sky events, telescope control and a classroom mode.