TL;DR: Any authenticator app is a major security upgrade over SMS-based codes — the specific app matters less than making sure you actually turn on two-factor authentication wherever it's offered.
An authenticator app generates time-based codes for two-factor authentication, which is significantly more secure than receiving codes by text message.
What to Look For
Look for an app that supports encrypted cloud backup (so you don't lose access if you switch phones), works across multiple devices, and doesn't require you to trust a single point of failure like your phone number, which can be hijacked via SIM swapping.
The Bottom Line
Any authenticator app is a major security upgrade over SMS-based codes — the specific app matters less than making sure you actually turn on two-factor authentication wherever it's offered.
If this looks similar to something else you've seen, it's worth reading Best Browsers for Privacy in 2026.
This pattern shows up elsewhere too — see Best Credit Cards With Built-In Fraud Protection.
Frequently Asked Questions
What’s the short answer?
Any authenticator app is a major security upgrade over SMS-based codes — the specific app matters less than making sure you actually turn on two-factor authentication wherever it's offered.
What should I actually look for?
An authenticator app generates time-based codes for two-factor authentication, which is significantly more secure than receiving codes by text message.