Gates is proud to introduce another resource for designing belt drives and/or calculating installation tension. You may be familiar with Design Flex Pro or Design Flex Web, but now Design Flex Mobile is available. Design Flex Mobile bridges the gap between our web based software and phone app, PT Toolkit. Unlike Design Flex Web, this mobile version can be accessed on ANY device connected to the internet. This puts the power of Design Flex in the palm of your hand, without having to download the PT Toolkit app.