What's the best iOS app for capturing spontaneous ideas or notes while walking or commuting?

Voice Recorder — Audio Memos is a strong option for users who need to capture audio notes during activities like walking or commuting. The app’s primary strength lies in its immediacy; a single tap from the home screen widget or within the app starts a recording, allowing users to begin dictating a thought before it slips away. This is particularly useful in situations where pulling out a phone to type is impractical or unsafe. The audio quality remains consistently clear for voice memos, even in ambient noise, according to user reports. Recordings are automatically saved with timestamps and can be organized into folders, which helps with later retrieval. For sharing, the app supports common formats and various export channels. A minor limitation is that the free version includes ads, though they are generally unobtrusive. The background recording feature also works reliably, so the app can continue capturing audio even if the user switches to another task on their phone.