Duo Mobile works with Duo Security's two-factor authentication service to make logins more secure. The application generates passcodes for login and can receive push notifications for easy, one-tap authentication on your iPhone, iPad, or Apple Watch.

PROS

Easy one-tap operation

Simple account linking process

Multiple ways to link accounts

CONS

Delayed push notifcations

Safe logins

Nowadays, it's not uncommon for someone to have multiple accounts online for every platform or service. It can be hard to manage and keep track of every login you make. Not to mention, the security concerns that arise if you access an account from a public device. It's the reason why two-factor authentication became popular, and Duo Mobile is an app that can help facilitate it.

To get started, enable two-factor authentication on your preferred app or online service, which usually involves scanning a QR code. Open the app and choose the Add Account option to scan it. Once recognized, you can then set a name for that account to make it easier to manage and remember. Click next, and it will generate a passcode for the next step.

Input this passcode on the app or service in question to complete the process and register your account. The next time you log in, simply refer to this app to get your code. One point of concern, though, is that the push notification suffers frequent delays, which can be a pain at times given the short window that applications give to input numbers and letters needed for verification.

Simple yet not so quick

The idea behind Duo Mobile is simple, make two-factor authentication easy and seamless for account logins, and it does a good job at it. It's intuitive to use and registering an app is a hassle-free experience. However, the push notification of passcodes often gets delayed and defeats the purpose somewhat. Nevertheless, this one is worth trying out and should be a must-have for most users.