There is a new android app "Routes Companion". Using this app, you can search multiple routes at the same time which is not possible by default Google Maps application. You can search routes with any number of source to any number of destination. Along with this, this app also gives distance and duration of each route separately.
App : https://goo.gl/pKWgaC
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App : https://goo.gl/pKWgaC
Video Description :