I just added an indicator for Sanyasi Yoga in BNNScratchPad. Using BNN this is a yoga of Saturn connected with Ketu which occurs every few years. About 1/4 of the population may have this yoga so is significant. The Sanyasi yoga indicates that the person my be more interested in spirituality than materialism.
I have included a list of years where Sanyasi Yoga is in effect by BNN from 1900-2100. Here:
SanyasYears.pdf
Some astrologers have raised the issue of doing horoscopes if the power grids get knocked out for awhile. Yes, you’ll have to do the charts manually. To that you will need an ephemeris. And since your device may not work either a printed ephemeris will be needed. There are ephemeris books for sale on the internet or you may have one from years past. Some of these may just have the geocentric planetary positions so an list of the ayanamsha for the dates may be needed. Here is a downloadable Lahiri ayanamsha list for the period of 1890-2000:
Lahiri1891-2000.pdf