A free program for Android, by GN Resound.

ReSound Control is a smart audio control app that lets you easily manage the volume level of your hearing aids and accessories. It’s so simple and intuitive to use that even your family members can easily use it. You can now easily adjust the volume level of your hearing aids and accessories using the remote control app. You can also edit and personalize program names, as well as create a custom list of devices to control. With this wireless hearing aids app and accessories, you can adjust the volume level and change your favorite programs with ease. Plus, its link screen lets you see how all of your connected devices are working together.