Install through the official mobile destination
Use DeepL's official mobile-app page to reach the appropriate app-store listing. Confirm the publisher before installing, especially when several similarly named apps appear in search results.
Only grant camera, microphone, photo, or file permissions when the workflow needs them. Permission names and features can differ between iOS and Android versions.
Prepare for real-world use
Test a short typed sentence, a clear photo, and a brief spoken sample while you still have a reliable connection. This exposes language-direction and permission issues before travel or meetings.
Core translation relies on online processing, so keep a backup plan for low-connectivity situations and avoid assuming every workflow is available offline.