Repeater-START, the only open-source offline repeaters mapping app, is available on Github. A working Android phone port is also available.
Watch Star Fork

Repeaters in grid square CN90BL

This is a listing of repeaters in this grid square.
You can read more about Maidenhead locator/grid squares here from the ARRL website.
If you find one of your local repeaters to be missing, please add it to the list.

Mhz

Repeater Callsign	Frequency	Offset	Encode	Decode	Nearest City	Restriction (if any)
WO6P	147.165Mhz	0.6Mhz	88.5		Shingletown, CA		Favorite