Google LLC today extended its log-in authentication service to iOS, allowing iPhone and iPad users to sign into accounts using Google security keys for two-factor authentication.

The service was first rolled out to Android devices in April and negates the need for either a physical security key or 2FA via SMS. The Advanced Protection Program prompts users to confirm logins via the phone or tablet, providing a more secure log-in service than alternative solutions.

The technology used by APP is essentially a software version of Google’s Titan Security Key. The sign-in keys generated are compliant with Fast IDentity Online or FIDO standards that are said to provide the strongest protection against automated bots, bulk phishing attacks and targeted phishing attacks, which aim to fool people into thinking messages or sites are known to them.