I subscribed to the Mountain Project app on the iPhone when it first came out and found it very useful. Now, a new version has been released for both the iPhone and Android phones and it is free. You can download any of the areas you want and then use it as a reference when you’re at the climbs. When we were in Red Rocks, we had the most recent printed guidebook with us. But had difficulty finding a route. We looked at a photo of the route on our phone and were able to find it quite easily. Try it and let me know what you think.