The U.S. Department of Veterans Affairs (VA) in collaboration with the Department of Defense has created mobile applications (apps) that target military Veteran-specific mental health challenges. With over half of Veterans being older than 65, it is essential to support these individuals' access to and use of these apps. One critical barrier to older adults using apps is that they may not be aware of mental health apps and often need assistance learning to use their devices. To address these gaps in knowledge, we designed and evaluated patient education materials teaching how to download apps and the basics of mobile device use. The materials also included step-by-step guides for three VA mobile apps: Mindfulness Coach, Mood Coach, and PTSD Coach. Guided by user-centered design and feedback from providers and older Veterans, the materials were developed and refined. Six local technology and geriatric content experts provided initial feedback. Next, six older Veterans (M = 78.5 years; 50% owned smartphones) formally evaluated the materials with a majority (83.3%) electing to 'recommend the materials to others.' Lastly, 12 providers provided feedback on the materials and 79% rated the materials as helpful. Providers viewed the materials as especially useful for patients who are unable to return to clinic. Overall, providers and Veterans found the materials easy to understand and valuable for novice users. Findings suggest the use of user-centered design principles and iterative evaluations to create patient technology education materials are vital to increase the use of mental health mobile apps among older Veterans.