6 apps to save you money on gas

This paid app maps out routes for your multi-stop trip. Instead of driving back and forth across town, or unknowingly taking the long way to run errands, you can map the fastest or shortest path with Route4Me. Once you take the optimized route, the app claims, you'll save 30% on gas and time.

Route4Me can optimize a route for up to 200 addresses -- a $100 per month option that seems pointed at heavy-driving workers like truckers -- but a 25-address, 25-route plan is available for $15 per month.

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