If you need to record some of your iPhone phone calls, I encourage you to check out Rev Call Recorder in the App Store. For that purpose, it’s entirely free with no in-app purchases or anything. Super useful. The ability to tap a button and get a subsequent transcript – even months later – makes it even more valuable as a tool. Check it out.

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Und, da es nicht ganz simpel aufzufinden ist:
https://itunes.apple.com/de/app/revvoicerecorder/id598332111?mt=8&&referrer=click%3Db9fa42b2-743c-4037-a5aa-9ad301790bf9