Repeater-START, the only open-source offline repeaters mapping app, is available on Github. A working Android phone port is also available.
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Repeaters in grid square IO93GJ

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.

Repeater Callsign Frequency Offset Encode Decode Nearest City Restriction (if any)
MB7ITW 50.53Mhz 0Mhz 71.9 71.9 Sheffield South Yorkshire, SY England Favorite
GB7SN 439.675Mhz -9Mhz CC1 Sheffield, United Kingdom, England Favorite
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