Best Duo Security App

250+ iOS apps curated and reviewed

4.4 avg rating
20 free apps
Updated August 2026

Duo Mobile is the household name in duo security app, but it's far from the only option. We track 250+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Duo Security App (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Duo MobileDuo MobileFree4.9★ (2.2M)NoNoAug 2026
2Microsoft AuthenticatorMicrosoft AuthenticatorFree4.7★ (677K)NoNoAug 2026
3Google AuthenticatorGoogle AuthenticatorFree4.9★ (1.1M)NoNoAug 2026
4Total Connect 2.0Total Connect 2.0Free4.6★ (286K)NoNoAug 2026
5ADT+ADT+Free4.8★ (54K)NoNoAug 2026
6SafeNet MobilePASS+SafeNet MobilePASS+Free4.8★ (115K)NoNoAug 2026
7Authenticator App - OneAuthAuthenticator App - OneAuthFree4.7★ (33K)NoNoAug 2026
8Lorex ClassicLorex ClassicFree4.6★ (25K)NoNoAug 2026

Top Picks for Duo Security App

Duo Mobile#1

Duo Mobile by Duo Security LLC

Security made simple
Editor's Choice
💼 Business
4.9😐(2.2M ratings)
Free
#14in Business
Duo Mobile screenshot 1
Duo Mobile screenshot 2
Duo Mobile screenshot 3
Duo Mobile screenshot 4

Enhance login security with two-factor authentication. Generate passcodes or use one-tap push notifications for seamless access to your accounts. Manage authentication for multiple applications and web services.

What We Love

  • 👍 Simple and easy to use
  • 🔒 Provides an extra layer of security
  • 🚀 Quick and convenient authentication
  • 🔒 Secure login experience

Room to Improve

  • 🐛 Unreliable notifications and push functionality
  • 🐛 Compatibility issues when changing devices
  • 🐛 Slow and frustrating authentication process
Microsoft Authenticator#2

Microsoft Authenticator by Microsoft Corporation

Protects your online identity
Strong Contender
📊 Productivity
4.7😞(677K ratings)
Free
#9in Productivity
Microsoft Authenticator screenshot 1
Microsoft Authenticator screenshot 2
Microsoft Authenticator screenshot 3
Microsoft Authenticator screenshot 4
Microsoft Authenticator screenshot 5
Microsoft Authenticator screenshot 6

Securely sign into online accounts with multi-factor authentication, passwordless login, or password autofill. Manage multiple accounts, including non-Microsoft services, and access Microsoft products and services seamlessly.

What We Love

  • 🚀 Seamless authentication
  • 🔒 Secure login process
  • 👍 Convenient passwordless sign-in
  • 🚀 Smooth app performance

Room to Improve

  • 🐛 Broken Apple Watch functionality
  • 🐛 Backup and restore issues
  • 🐛 Confusing login flow
Google Authenticator#3

Google Authenticator by Google LLC

Worth Considering
🔧 Utilities
4.9😞(1.1M ratings)
Free
#6in Utilities
Google Authenticator screenshot 1
Google Authenticator screenshot 2
Google Authenticator screenshot 3
Google Authenticator screenshot 4
Google Authenticator screenshot 5
Google Authenticator screenshot 6

Enhance your online security with a second verification step for your accounts. Generate codes directly on your phone, even offline, to protect against unauthorized access. Sync codes across devices for easy access and manage multiple accounts securely.

What We Love

  • 👍 User-friendly
  • 🔒 Secure authentication
  • 🚀 Simple and fast
  • 🔒 Reliable security

Room to Improve

  • 🐛 Randomly deleted all codes
  • 🐛 Unreliable, lost access to accounts
  • 🐛 Timing issues, codes didn't work

More Duo Security App apps to explore

4
Total Connect 2.0
Total Connect 2.0
Total Connect 2.0
by Resideo Technologies, Inc.
Free

Manage your home or business security and smart devices remotely. Arm/disarm your system, view live and recorded video, control lights, locks, thermostats, and garage doors. Automate actions for convenience and peace of mind.

Arm/disarm security systemView live and recorded videoControl smart locks and lights
🌟 Lifestyle
(286K)
free
5
ADT+
ADT+
ADT+
by ADT LLC
Free

Control your ADT+ home security system and compatible smart devices remotely. Monitor your home, manage access, and receive alerts for events. Features include live video streaming, two-way talk, and smart home device integration.

Arm/disarm security system remotelyStream live video from camerasTwo-way talk with visitors
🌟 Lifestyle
(54K)
free with in-app purchases
6
SafeNet MobilePASS+
SafeNet MobilePASS+
SafeNet MobilePASS+
Thales Group
Free

This app provides secure mobile authentication for accessing cloud apps, VPNs, and other services. It offers one-tap push authentication, secure one-time passcodes, and biometric unlock options for enhanced security and user experience. The app supports quick self-enrollment and can manage multiple authenticators.

One-tap push authenticationSecure one-time passcodes (OTPs)TouchID/FaceID unlock
💼 Business
(115K)
free
7
Authenticator App - OneAuth
Authenticator App - OneAuth
Authenticator App - OneAuth
Secure your online accounts
Free

Secure your online accounts with industry-standard two-factor authentication. Easily add accounts, generate time-based OTPs, and benefit from encrypted backups. Organize and manage your TFA with features like folders, brand logos, and search.

Add accounts via QR code or manual entryTime-based OTPs (offline access)Encrypted backup and secure recovery
🔧 Utilities
(33K)
free
8
Lorex Classic
Lorex Classic
Lorex Classic
by Lorex Corporation
Free

Monitor your property with live, ultra-high-definition video streams from your security cameras. Review past events, receive instant motion alerts, and customize settings for personalized security management. Access and control your devices remotely for peace of mind.

4K Live ViewingEvent PlaybackSmart Alerts
📷 Photo & Video
(25K)
free with in-app purchases
9
Night Owl Protect
Night Owl Protect
Night Owl Protect
by Night Owl SP, LLC
Free

Monitor your home or business in real-time from your smartphone or tablet. Receive instant alerts for detected humans, faces, or vehicles. Easily share footage and recordings, and manage multiple devices with secure login.

Real-time mobile monitoringHuman, face, and vehicle detection alertsSecure app-based Bluetooth setup
💼 Business
(55K)
free with in-app purchases
10
Twilio Authy
Twilio Authy
Twilio Authy
by Authy Inc.
Free

This app provides a secure and convenient way to manage two-factor authentication tokens for your online accounts. It offers features like cloud backups, multi-device synchronization, and offline token generation to enhance account security and prevent lockouts.

Secure 2-step verification token generationEncrypted cloud backupsMulti-device synchronization
🔧 Utilities
(53K)
free
11
2FA Authenticator • Auth App+
2FA Authenticator • Auth App+
2FA Authenticator • Auth App+
Secure & Fast Authentication
Free

Enhance your online account security with this tool that generates two-factor authentication (2FA) codes. It supports a wide range of services and offers effortless setup with a user-friendly interface. Secure your digital identity and gain peace of mind.

Generate two-factor authentication codesSupport for a wide range of servicesEffortless setup process
📊 Productivity
(102)
free with in-app purchases
12
2FA Authenticator (2FAS)
2FA Authenticator (2FAS)
2FA Authenticator (2FAS)
#1 Rated 2FA Authenticator
Free

Securely log in to your online accounts with two-factor authentication. This app protects your personal data and passwords from cyber threats with a simple, private, and open-source solution. It offers easy token restoration, app protection, and offline functionality.

Two-factor authenticationToken backup and restoreApp protection with passcode/biometrics
📊 Productivity
(35K)
free
13
Authenticator App - Two Factor
Authenticator App - Two Factor
Authenticator App - Two Factor
Two-factor - Duo Security
Free

Secure your online accounts with this simple and safe two-factor authentication app. It generates 6-digit one-time passwords to add an extra layer of security against hackers. Protect your accounts by scanning QR codes or manually entering tokens.

Secures online accountsGenerates 6-digit TOTP codesSupports QR code scanning
🔧 Utilities
(400)
free with in-app purchases
14
Luma Surveillance
Luma Surveillance
Luma Surveillance
by Wirepath Home Systems, LLC
Free

Monitor your security cameras remotely with live video streaming, easy playback, and recording capabilities. Manage multiple devices, customize views, and capture important moments from your tablet or mobile device.

Live video viewing (single/split screen)Search and playback recordingsCapture snapshots and record video
📊 Productivity
(262)
free
15
STVU
STVU
STVU
by SecurityTronix
Free

Easily monitor your Securitytronix IP cameras, DVRs, and NVRs remotely. The app offers live viewing, timeline playback, and motion detection alerts for real-time security.

Remote camera monitoringLive viewingTimeline playback
📊 Productivity
(0)
free
16
Defender Empower
Defender Empower
Defender Empower
by Empowerment Technologies Inc.
Free

Stay connected with your home or business from anywhere. This app allows you to view live feeds, review recorded footage, and receive instant motion detection alerts. You can also easily share important clips and customize recording schedules.

Live video streamingRecorded footage playbackMotion detection alerts
🔧 Utilities
(1.7K)
free
17
Defender 24-7
Defender 24-7
Defender 24-7
by Empowerment Technologies Inc.
Free

Monitor your property remotely with live video feeds and recorded footage. Receive instant motion alerts and easily share important clips. Compatible only with specific 4K security systems.

Live video monitoringRecorded footage playbackMotion detection alerts
📷 Photo & Video
(3.4K)
free with in-app purchases
18
Connect2Go
Connect2Go
Connect2Go
by Envisacor Technologies Inc.
Free

Control your home security system remotely and receive real-time notifications. This app provides interactive services for various alarm systems, offering peace of mind and enhanced security.

Remote control of security systemReal-time notificationsInteractive services
🌟 Lifestyle
(46)
free
19
Okta Verify
Okta Verify
Okta Verify
by Okta, Inc.
Free

This app provides a secure way to verify your identity for account access. It offers two-factor authentication through temporary codes or push notifications. The app prioritizes privacy, only requesting camera access for initial device registration.

Two-step verificationGenerate 6-digit codesApprove sign-in requests via push notification
💼 Business
(37K)
free
20
mySafeTouch
mySafeTouch
mySafeTouch
by Safetouch Inc.
Free

Control your home security and automation system remotely. Arm/disarm your system, view cameras, manage locks and lights, and adjust thermostats. Receive personalized alerts for various events, ensuring peace of mind and convenience.

Remote arm/disarm security systemView live/stored camera footageLock/unlock doors remotely
🌟 Lifestyle
(163)
free

FAQ about Duo Security App

What is the best duo security app for iPhone?
Duo Mobile tops our duo security app ranking as of August 2026, with a 4.9-star average from 2.2M App Store ratings, and it's free to download.
Yes — 20 of the top duo security app we rank are free to download, including Duo Mobile and Microsoft Authenticator.
Duo Mobile has no ads and has no in-app purchases, according to its App Store listing as of August 2026.
We track 250+ duo security app on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
Duo Mobile enhances login security by providing two-factor authentication. It generates passcodes and allows for one-tap authentication via push notifications to secure your accounts.
The application works with Duo Security's service to offer secure logins. You can generate passcodes directly within the app or approve login requests with a simple tap on a push notification.