Udaya

Transfer Move the Saved horoscopes on this device to another phone. One shows the code, the other reads it: the details pass between the two screens and nowhere else.

Send

Nothing saved here yet

Save some birth details on the Porutham or Jathagam page first, then come back and show them to the other phone.

Receive

Read the code shown on the other phone

This browser cannot read a code from the camera, so paste the code across or choose the file the other device saved.

People already on this device are updated rather than doubled up, so reading the same code twice is harmless.

Nothing leaves the two devices

The codes are drawn on this screen from what is already stored in this browser, and read by the other phone's camera. No server is involved at any step, so the whole transfer works with both phones offline, in a room with no signal. Nothing is uploaded, and nothing is kept anywhere but on the two devices.

Positions are accurate to a few arc-minutes, enough for signs, stars and padas except within about half a degree of a boundary, which the pages point out. Nothing you enter leaves the browser.

How the calculations work