Most modern "offline" recorders rely on the Accessibility Service or MediaProjection API (screen recording). The app records your screen and internal audio as if it were recording a YouTube video. It then strips the video track, leaving only the MP3/WAV of the call. This works, but requires you to grant "Draw over other apps" and "Accessibility" permissions—two of the most dangerous permissions in Android.
: To record on newer Android versions, you must install the ACR Phone Helper (APH) as a companion app from the official ACR site . offline call recorder app for android
: A popular, straightforward choice for basic automatic recording. It allows you to filter which calls to record and save them directly to your phone's storage. CallMaster Most modern "offline" recorders rely on the Accessibility
: A versatile app that records both standard cellular calls and VoIP services like WhatsApp, Skype, and Telegram. This works, but requires you to grant "Draw
You can record and play back calls in areas with no data connection.
Finding a reliable for Android in 2026 is tricky because Google has restricted third-party apps from accessing call audio for privacy reasons. However, several apps use workarounds like accessibility services to record calls without needing an active internet connection.