Auth0 Guardian vs Cardcrews
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
Cardcrews
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Cardcrews keeps every loyalty and membership card you own in one simple place. Instead of digging through a stuffed physical wallet, scan the QR code or barcode on each card once and it's saved on your phone, ready whenever you need it. Store cards from grocery stores, coffee shops, gyms, pharmacies, and any other program that uses a scannable membership or loyalty card. Add a photo of the card for quick visual reference, organize your collection so the ones you use most are easy to find, and pull up any card's code instantly at checkout. Cardcrews also lets you share cards with a small trusted group of people you invite, called a "crew" - handy for a family or household that wants to use the same store or membership cards without passing around a physical card. Sharing is private and limited to the people you invite; it is not a public or social feature. Cardcrews is free to use. Features: - Scan QR codes and barcodes to save loyalty and membership cards - Attach a photo to each card for easy identification - Organize and quickly find your cards - Share cards privately with an invited "crew" (e.g. family) - Quick access to your card's code without digging through a physical wallet
Screenshots
Verdict
The clearest difference is update cadence: Cardcrews at every 3 weeks against Auth0 Guardian's every 3 months. On price, ads, in-app purchases and device support 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.
Auth0 Guardian ships an update every 3 months, Cardcrews every 3 weeks. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.
| Parameter | Auth0 Guardian | Cardcrews |
|---|---|---|
| Price | Free | Free |
| Rating | 2.4 (116 ratings) — better | — |
| Positive reviews | 14.3% of reviews | — |
| Number of ratings | 116 — better | — |
| Update frequency | Every 3 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 15.0 | 15.0 |
| Further details — not scored | ||
| Size | 21 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Auth0 | Artem Maliuha |
Bugs and requests
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
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- 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
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- 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
Cardcrews
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Auth0 Guardian
No in-app purchases
Cardcrews
No in-app purchases
Questions
Is Auth0 Guardian free?
Is Cardcrews free?
Do Auth0 Guardian or Cardcrews have ads?
Which is updated more often, Auth0 Guardian or Cardcrews?
Other comparisons
