Don't let the perfect be the enemy of the good! ©Rabbi Frand
If you have a device preset with Lakewood area zmanim set with a drop of leeway (example: 20 min before Skiyah to 75 min after for mid Lakewood) should be good for the whole Lakewood area.
Similarly, for CH, with Alter Rebbe zmanim for CH area.
Etc. etc.
The tech-savvy can still do it the old way.