Best free call recording app for iphone?

Free call recording on iPhone does not exist in any usable form, and that is Apple's decision, not a gap in the App Store. iOS gives apps no access to the cellular call audio stream, so every recorder works around it: a three-way conference call through a server, a hardware recorder, or Google Voice on a US number.

The workarounds, rated honestly:

• Google Voice (US only, free) — record incoming calls by pressing 4; the recording lands in the Voice inbox. Free, but a US number is required and it is inbound only.
• Conference-bridge apps — you merge the call through the app's server, which records it. Free tiers give a few minutes a month; quality is mediocre and both parties hear a prompt in some versions.
• A hardware recorder — a dongle or a second device on speaker. Reliable, ugly, and the only offline option.
• iOS 18.1's built-in call recording — Apple added it to the Phone app on supported devices, with an automatic announcement to both parties. If your iPhone runs it, that is the cleanest answer and it costs nothing.
• Android — most OEM dialers record natively; iPhone has no equivalent.

The legal part that matters more than the app: in many US states and most of the EU, recording a call without the other party's consent is a criminal offence. Apple's own feature announces the recording for exactly that reason.

Where our app fits. Ultimate Phone Spy covers Android 4.0+, Windows and macOS (supported devices) and logs calls rather than recording audio. No iOS product.