MaX UC vs Auth0 Guardian
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
MaX UC
Manage your home or office phone services from any device, anywhere. Features include high-quality audio, cross-device chat syncing, visual voicemail with transcriptions, and real-time contact presence. The app is designed with accessibility in mind, meeting WCAG 2.1 AA guidelines.
- High quality audio
- Cross-device chat syncing
- Visual voicemail with transcriptions
- Real-time contact presence
- Accessibility support (WCAG 2.1 AA)
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IMPORTANT: Full telephony functionality is only available as directed by your telephone service provider. With MaX UC, you can take control of your home or office telephony services on any device, wherever you are. For the past year we have focused on making our MaX UC apps more accessible. Important enhancements like supporting landscape mode, large font size and full screen reader support means that MaX UC meets the WCAG 2.1 AA accessibility guidelines. This is an important milestone that helps us to support all our users, no matter their access needs. Key features: - High quality audio optimized for both Wi-Fi, and 3G/4G connections. - Chat on any device to others in your business, with messages synced across your devices so you can pick up the conversation any time. - Powerful voicemail control with alerts, transcriptions of your received messages, and visual voicemail management. - Realtime presence from your business contacts to help you get in touch at the right time, and custom presence to help others reach you. NOTE: Your service provider may not offer all features listed or may require you to pay additional subscription charges to access certain features. Contact your service provider for information. MaX UC also requires data or Wi-Fi access. Use of these services may incur additional charges.
Auth0 Guardian
This app provides multi-factor authentication by sending push notifications to your device for easy approval or denial of account access. It can also generate one-time passwords for secure logins.
- Push notification authentication
- Allow/deny account access
- One-time password generation
- Multi-factor authentication
- Secure login
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Auth0 Guardian is a mobile app that can deliver push notifications to a user’s pre-registered device (typically a mobile phone or tablet) from which a user can immediately allow or deny account access via the press of a button. It can also generate one-time passwords if that is preferred. Note for developers: Auth0 Guardian is one of the multi factor authentication options that can be used within the Auth0 identity platform (https://auth0.com). You can enable it with a single switch. You don’t have to change your apps to start supporting multi factor authentication.
Screenshots
Verdict
The clearest difference is rating: MaX UC at 4.1 against Auth0 Guardian's 2.4. MaX UC also leads on ratings volume (1.1K vs 114). Auth0 Guardian's advantage is iOS requirement (15.0 vs 17.6). On price, review sentiment, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
MaX UC holds the better App Store score, 4.1 against 2.4. That said, the two scores are not equally well evidenced: MaX UC has 1.1K ratings behind it against 114, so its average is the more settled of the two. Written reviews point the same way: 18% of MaX UC's written reviews are positive against 15% of Auth0 Guardian's.
MaX UC ships an update every 2 months, Auth0 Guardian every 3 months. Both last shipped on October 16, 2026.
| Parameter | MaX UC | Auth0 Guardian |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (1.1K ratings) — better | 2.4 (114 ratings) |
| Positive reviews | 17.5% of reviews — better | 14.6% of reviews |
| Number of ratings | 1.1K — better | 114 |
| Update frequency | Every 2 months — better | Every 3 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 15.0 — better |
| Further details — not scored | ||
| Size | 131 MB | 20 MB |
| Age rating | 17+ | 4+ |
| Developer | Metaswitch | Auth0 |
Customer experience
MaX UC
Auth0 Guardian
User reviews
MaX UC
From 1.1K App Store ratingsWhat we love
- 🚀 Excellent POTS replacement
- 👍 Great soft phone app
- 💡 Can answer calls from anywhere
Room to improve
- 🐛 Crashes frequently
- 🐛 Unreliable call quality
- 🐛 Constant reconnecting issues
- 🐛 Inability to transfer or park calls
- 🐛 Ignores Focus mode
Auth0 Guardian
From 114 App Store ratingsWhat we love
- 👍 Generally reliable authenticator
- 👍 Intuitive and simple
- 👍 Clean easy to use app
- 👍 Beautiful app that works
- 👍 Worked just fine
Room to improve
- 🐛 Notifications not working properly
- 🐛 No more Apple Watch or lock screen approval
- 🐛 Cannot approve from Apple Watch
- 🐛 Push notifications stopped working
- 🐛 App is garbage
Bugs and requests
MaX UC
Reported bugs
4 issues- Incoming calls go straight to voicemail
- Calls drop or fail to connect
- Chat messages disappear or don't sync
- App crashes after iOS updates
Requested features
4 requests- Add texting functionality
- Provide more ringtone and volume options
- Implement call parking and transfer features
- Improve Bluetooth compatibility
Auth0 Guardian
Reported bugs
37 issues- Notifications not working properly on iPhone iOS
- Limited notification configuration settings
- Apple Watch notification not working
- Push notifications not working
- New update broke Apple Watch approvals
Show 32 moreShow fewer
- Cannot approve MFA with Apple Watch
- Cannot long press on push notification to approve login
- Push Notification not working
- Push notifications stopped working
- Update fixed push notifications, now requires manual code entry
- New update still no notification sounds
- Receiving same code for different accounts
- iPhone does not show all numbers
- Only shows 4 numbers, need to copy and paste to see all
- Cannot see all 6 digits after update
- Cannot see ALL 6 numbers to log onto computer
- New phone transfer issues
- App did not transfer over to new phone
- QR code does not exist for new phone setup
- Won't let me transfer my account to a different phone
- Notifications are not working
- No notification sound
- No sound when notification comes up
- No sound with the notification
- Confirmations never come up, have to go into the app for codes
- App prompts to start without instructions, link, or QR code
- App did not transfer well and was unusable on new phone
- Cannot install application on telephone
- Poor migration, no way to migrate Authenticator app to a new device
- Doesn't work—won't scan any QR code’s
- Confirmation page doesn’t show immediately
- Crashes immediately upon launch
- Unable to remove tokens
- Push authorization no longer works, app just turns off
- Client won’t even open
- App doesn't launch
- Always crashes on startup
Requested features
12 requests- Allow account transfer to another phone
- Create a feature to transfer connected accounts to the same app on another phone
- Add watch capability
- Needs a watch version
- Add Apple Watch notification support
Show 7 moreShow fewer
- Restore Apple Watch approval
- Restore lock screen approval
- Add sound to notifications
- Allow users to see all 6 digits on iPhone
- Improve app startup process
- Provide instructions or QR code for initial setup
- Allow deletion of retired tokens
In-app purchases
MaX UC
No in-app purchases
Auth0 Guardian
No in-app purchases
Questions
Is MaX UC free?
Is Auth0 Guardian free?
Which has better reviews, MaX UC or Auth0 Guardian?
Do MaX UC or Auth0 Guardian have ads?
Which is updated more often, MaX UC or Auth0 Guardian?
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