DX22OP
PX-08
Under the hood
Measured against Swiss Ephemeris, and the number is published.
An astronomy console is only worth having if you can check it. Every figure here is one somebody can hold us to: the ayanamsa, the ephemeris, the worst-case error, the test count and what it costs to leave running.
The specification.
Platforms
Windows desktop · web · installable PWA
Ayanamsa
Lahiri (Chitrapaksha) · sidereal
Ephemeris
astronomy-engine · VSOP87 / ELP, no data files
Accuracy
0.42′ worst · 0.15′ mean vs Swiss Ephemeris
Tests
191 assertions, 0 failing
Yogas
49 rules, each with its evidence
Places
232 cities offline · 152 in India
Houses
Whole sign · mean node
Footprint
~0.03% duty cycle · nothing when hidden
Runtime
System webview — no bundled browser
Install
Per-user desktop · or from the browser
Offline
Cached on first visit · then no network
Price
Free