SuperCards and CardWarden are both built to fill the hole Stocard left behind. They are two of the strongest loyalty card apps available right now, and if you are looking for a Stocard replacement, you have probably come across both. But they take very different approaches to what a card wallet should be.
I am the developer behind CardWarden, and I have a lot of respect for what SuperCards has done. After Stocard's demise I switched over to SuperCards as my go to offline loyalty card manager and CardWarden is heavilty inspired by it. This comparison is my honest take on where each app shines and where it falls short.
SuperCards is the closest thing to a direct Stocard replacement - familiar interface, zero friction, free to use. CardWarden goes further with zero-knowledge encryption, encrypted family sharing, and a focus on data ownership. If you want Stocard's simplicity back, SuperCards is the obvious pick. If you want a card vault you can share with your household and trust that nobody - not even the developer - can read your data, CardWarden was built for that.
Two Stocard Successors, Two Philosophies
When Klarna shut down Stocard in March 2026, millions of users were left scrambling. Two apps emerged as the leading alternatives, and their backstories could not be more different.
SuperCards was built by the original Stocard team. After Klarna acquired Stocard in 2021 and eventually folded it into their shopping platform, the creators went back to what they knew best: a clean, simple card wallet. SuperCards carries forward Stocard's design DNA - the same minimal interface, the same focus on getting in and out fast at checkout. It is free, requires no signup, and already has over 3 million users and 4,000+ card templates.
CardWarden is my answer to a different question. I was a Stocard user too, and when the shutdown happened, I did not just want a replacement - I wanted something better. I wanted real encryption so my card data could not be read by the app developer or any server. I wanted family sharing so my wife and I could stop texting photos of gift card barcodes to each other. And I wanted a guarantee that my data would never be locked inside a platform that could pull the rug again. CardWarden is heavily inspired by Stocard, but it elevates the experience with features Stocard never had.
Feature Comparison
| Feature | CardWarden | SuperCards |
|---|---|---|
| Loyalty card storage | Yes | Yes |
| Gift card management | Yes, with balance checking | Storage only |
| Credit & debit cards | Yes | Yes |
| Works offline | Yes, always | Yes, always |
| Zero-knowledge encryption | Yes (ChaCha20-Poly1305) | No (local encryption only) |
| Family sharing | Yes, with role-based access | No |
| Kids Mode | Yes, no account needed | No |
| Cloud sync | Yes (end-to-end encrypted) | Yes |
| Smartwatch support | Not yet | Yes |
| Home screen widgets | Yes | Yes |
| Card templates | Growing library | 4,000+ templates |
| AI barcode scanning | Non AI OCR only | Yes, AI-powered |
| Import from Stocard/Klarna | Yes (screenshots) | Yes (screenshots) |
| Data export | Yes (spreadsheet or encrypted) | No |
| Biometric lock | Yes | Yes |
| Cross-platform | Android & iOS | Android & iOS |
| No signup required | Required for cloud features | Yes, fully optional |
| Free to use | Paid plans | Yes, completely free |
Where CardWarden Pulls Ahead
Zero-knowledge encryption
SuperCards uses end to end encryption to create a backup of your cards on their server. Though I am not sure if they are implementing Zero-knowledge encryption which means the server are unable to read any of your data, which is what CardWarden ensures. SuperCards does offer an "anonymous mode" where cards are encrypted on your device - a solid privacy step that puts it ahead of most competitors, ensuring the data stays local.
CardWarden's architecture answers that question upfront. Your card data is encrypted on your device using ChaCha20-Poly1305 before it ever touches a server. The encryption key is derived from your master password using PBKDF2 with 600,000 iterations. I cannot read your data. In a server breach, an attacker gets nothing but encrypted blobs. This is the same zero-knowledge approach used by password managers like Bitwarden - applied to your card wallet.
Family sharing
This is the feature that drove me to build CardWarden in the first place. My wife and I share grocery store gift cards, and managing them across two phones was a constant headache - stale balances, duplicate scans, no way to know what the other person had already spent.
CardWarden lets you create shared "pockets" (folders of cards) and invite family members with role-based access:
- Viewer - can see cards but not modify anything
- User - can use cards at checkout and update balances
- Editor - full access to add, edit, and remove cards
The sharing is end-to-end encrypted using ECDH key exchange. There is also a Kids Mode that lets children join without creating an account or providing personal data.
SuperCards is a personal wallet - there is no sharing or family features.
Encrypted cloud sync
CardWarden syncs your cards across all your devices with end-to-end encryption. Add a card on your phone, and it appears on your tablet and your partner's device (if shared) within seconds. The server facilitates the sync but never has access to the actual card data.
SuperCards does not offer cloud sync. Your cards live on the device where you added them. If you switch phones, you will need to transfer them manually.
Gift card balance checking
CardWarden has a built-in browser that opens the retailer's balance-check page, pre-fills your card number and PIN, and updates the stored balance after verification. When a family member uses a shared gift card, the new balance syncs to everyone's device in real time.
SuperCards stores gift cards but does not offer balance checking.
Data export and ownership
CardWarden lets you export all of your data at any time - as an encrypted backup or as a plain-text spreadsheet you can open in Excel or Google Sheets. No lock-in, no hostage data. After what happened with Stocard, I believe this is non-negotiable.
Where SuperCards Wins
SuperCards was built by the people who created Stocard, and that pedigree shows. There are things they do better than CardWarden, and I think it is important to be upfront about that.
SuperCards' advantages
- Completely free - No subscription, no tiers, no card limits. The entire app is free. For users who just want a simple card wallet with zero cost, this is hard to beat.
- Familiar Stocard experience - If you loved Stocard's interface, SuperCards feels like coming home. The design language, the flow, the speed - it is all there.
- 4,000+ card templates - Massive library of pre-built templates for retailers worldwide. Scanning and adding a card takes seconds.
- Smartwatch support - Show your loyalty cards from your smartwatch at checkout. CardWarden does not have smartwatch support yet.
- AI-powered scanning - SuperCards uses AI to improve barcode recognition, recognizing card brand based on the barcode and logo.
- No signup required - Start using the app instantly. No email, no account, no friction.
What CardWarden does not do
- No smartwatch support (yet)
- No AI-powered barcode scanning
- Smaller card template library
- Free tier has a card limit
- Cloud features require a subscription
- Indie app from a solo developer (smaller team, smaller budget)
If all you need is a straightforward loyalty card wallet with zero cost and zero friction, SuperCards is a genuinely excellent choice. The team behind it literally invented this category of app, and their experience shows in the polish and speed of the product.
The Privacy Question
What each app knows about you
Both apps are privacy-respecting compared to big tech alternatives. SuperCards in anonymous mode collects nothing - cards are encrypted on your device, and the app works without an internet connection. In standard mode, it collects device information and usage analytics.
CardWarden collects your email address for account creation and anonymous analytics (OS version, device model, app version - no advertising IDs). Card data is end-to-end encrypted and unreadable on the server. The key difference is that CardWarden's encryption extends to the cloud - your data stays encrypted even when synced across devices, and even I cannot read it.
SuperCards' anonymous mode is great for local-only use. But if you want cloud sync and family sharing without giving up privacy, CardWarden's zero-knowledge architecture is purpose-built for that.
Pricing
SuperCards is completely free. No tiers, no subscriptions, no card limits. The app is ad-free and does not monetize user data. It is unclear how the business model sustains long-term development, but for now, the entire feature set is available at no cost.
CardWarden offers a free tier and three paid tiers:
The free tier exists so you can get a feel for the app - explore the interface, add a few cards, and see if it fits. It has a card limit and is not designed for day-to-day use. If you want to try the full experience, the yearly Cloud and Family plans include a free trial, which is a better way to see everything CardWarden can do before committing.
- Premium Offline - A one-time, lifetime purchase. Full offline card management, encryption, biometric lock. No cloud, no subscription.
- Premium Cloud - Monthly or yearly subscription for individuals. Adds cloud backup, multi-device sync, and related features. Free trial available on the yearly plan.
- Premium Family - Monthly or yearly subscription covering five Premium Cloud seats, shared pockets, role-based access, push notifications, and Kids Mode. Free trial available on the yearly plan.
Cloud features cost money to operate (encrypted sync infrastructure is not free), so those tiers are subscriptions. The offline tier is one-time because it does not generate ongoing server costs. CardWarden does not monetize your data, show ads, or earn merchant commissions - subscriptions and one-time purchases are the entire business model.
Frequently Asked Questions
Is SuperCards made by the Stocard team?
No, SuperCards is not made by the original Stocard team. It is an entirely independent app developed by a different company (MWM) as a streamlined, ad-free alternative.
Does SuperCards have family sharing?
No. SuperCards is designed as a personal card wallet - there is no way to share cards or folders with family members. CardWarden offers encrypted family sharing with role-based access control (Viewer, User, Editor) and a Kids Mode that lets children join without creating an account.
Is SuperCards or CardWarden more private?
Both apps take privacy seriously, but they approach it differently. SuperCards offers an anonymous mode that encrypts cards on your device and requires no signup. CardWarden uses a zero-knowledge architecture - your data is encrypted on your device using ChaCha20-Poly1305 before it ever reaches a server, and even the developer cannot read it. If you use cloud sync, CardWarden's encryption means the server only ever sees encrypted blobs.
Can I import my cards from Stocard to CardWarden?
CardWarden supports importing cards similar to SuperCards, taking screenshots of cards from another app, then perform a batch import. If you still have access to your old Stocard data (or migrated it to Klarna), you can re-add your cards to CardWarden.
Is CardWarden free?
CardWarden has a free tier, but it has a card limit and is really there so you can try the app and get a feel for how it works. For day-to-day use, the paid tiers are a better fit. If you want to try the full experience risk-free, the yearly Cloud and Family plans include a free trial. Premium Offline is a one-time lifetime purchase for full offline features, while Premium Cloud and Premium Family are subscriptions that cover the ongoing cost of encrypted cloud sync and family sharing infrastructure.
The Bottom Line
SuperCards and CardWarden both exist because Stocard got swallowed by a company that did not care about its users. They are both good apps built by people who genuinely wanted to solve this problem. The question is what you prioritize.
Choose SuperCards if you want the familiar Stocard experience back - free, fast, no signup, no friction. You do not need cloud sync or family sharing, and you prefer the simplicity of a personal card wallet with a massive template library and smartwatch support.
Choose CardWarden if you want a card vault that encrypts everything with a zero-knowledge architecture, syncs across your household, and gives you full ownership of your data. You value family sharing, encrypted cloud backup, and the peace of mind that comes from knowing your data cannot be read by anyone but you.
Both are legitimate Stocard successors. They just carry the torch in different directions.
CardWarden is opening for beta testing soon. If you want to try an encrypted card manager that syncs across your household, sign up for early access.