With something like Tasker this doesn't need to be laborious at all (I have location turn on while certain apps are in use, e.g. Osmand~, and turn off otherwise

With something like Tasker this doesn't need to be laborious at all (I have location turn on while certain apps are in use, e.g. Osmand~, and turn off otherwise). And, tin-hattery aside, it has power-saving advantages.