CardWarden vs Stocard

Stocard was the app that started it all for me. It was clean, simple, and did exactly one thing well - it held all your loyalty cards in one place so you could leave the plastic at home. Millions of people loved it. I loved it. And then it was gone.

CardWarden exists because Stocard does not. I built it to be the successor - keeping what made Stocard great and adding the things I always wished it had: real encryption, family sharing, and a business model that does not depend on selling you to advertisers.

This is an honest look at how the two apps compare - what Stocard did well, where it fell short, and what CardWarden does differently.

What Happened to Stocard

If you are here, you probably already know the story. But for the record:

The migration was a disaster. Forums and social media were flooded with reports of "technical error" messages, failed transfers, and locked accounts. Users who had spent years building their card collections found themselves staring at empty wallets. To make things worse, migrating to Klarna required creating a full financial services account - Stocard had been blissfully simple, no sign-up needed. Klarna demanded your name, date of birth, and phone number just to access a handful of loyalty cards.

Features that people relied on also disappeared in the transition. Stocard had Apple Watch support - raise your wrist, show your barcode, done. Klarna dropped that entirely. The simple, no-frills card wallet was replaced by a shopping platform full of buy-now-pay-later prompts, cashback offers, and merchant recommendations.

For a lot of people, the Klarna transition was not an upgrade. It was the end of something they relied on. You can read more about how CardWarden compares to Klarna here.

Why I Built CardWarden

I was a Stocard user for years. When Klarna acquired it, I had the same sinking feeling everyone else did. The moment a loyalty card app gets absorbed by a payments company, you know the priorities are going to shift.

So I started building CardWarden. Not as a business opportunity - as a replacement for something I personally needed. My main goal was simple: create a Stocard successor that keeps the strong points (dead-simple barcode scanning, offline access, clean organization) and elevates the experience with the features I always wished Stocard had.

The biggest gap in Stocard was always security. It stored your card data in plain text on its servers. No encryption, no zero-knowledge architecture, no way to know who had access to your data. For a loyalty card, maybe that feels low-risk. But for gift card PINs, credit card numbers, and membership IDs? That always bothered me.

The second gap was sharing. My wife and I share grocery store gift cards, and Stocard had no way to handle that. We would text each other screenshots of barcodes, try to remember who had which card, and occasionally both show up at checkout with a card that had already been spent. It was a mess.

CardWarden solves both of those problems - and a few more along the way.

Feature Comparison

This table compares what Stocard offered at its peak with what CardWarden offers today. Since Stocard is discontinued, its column reflects past capabilities.

What CardWarden Adds Beyond Stocard

Real encryption, not just a promise

Stocard stored your data on its servers in a way that the company could read. That was the industry standard at the time, and Stocard was not doing anything unusual. But it meant that your card numbers, membership IDs, and any notes you attached were accessible to Stocard's team and, after the acquisition, to Klarna.

CardWarden uses a zero-knowledge architecture. Your data is encrypted on your device using ChaCha20-Poly1305 before it ever reaches the server. The encryption key is derived from your master password via PBKDF2 with 600,000 iterations. I cannot read your data. Even in a server breach, an attacker gets nothing but encrypted blobs. This is the same approach used by password managers like Bitwarden - applied to your card vault.

Family sharing that actually works

This was the feature I wanted most and Stocard never offered. 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 uses end-to-end encryption via ECDH key exchange. The server facilitates the handshake but never sees the shared data. There is also a Kids Mode that lets children join the family without creating an account or providing personal data.

Gift card balance checking

Stocard let you store gift cards, but that was about it. 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. When a family member uses a shared gift card, the new balance syncs to everyone in real time.

Data export - your cards are yours

Stocard never offered data export. When it shut down, users who had not manually saved their card numbers lost them. CardWarden lets you export everything at any time - as an encrypted backup or as a plain-text spreadsheet. No lock-in, no hostage data.

Biometric lock

Stocard had no app-level security. Anyone who picked up your phone could open the app and see all your cards. CardWarden supports fingerprint and face authentication to lock the app behind biometrics.

What Stocard Did Well

Stocard was not perfect, but it earned its 50 million users for real reasons. I want to acknowledge what it got right - because I built CardWarden with the intention of carrying those strengths forward.

CardWarden inherits the simplicity and the core card-scanning experience. The UX philosophy is the same: open the app, see your cards, tap to scan. But underneath that familiar surface, everything is encrypted, exportable, and shareable.

Data Collection: Then vs Now

What each app knew about you

Early Stocard was relatively lean on data collection - email, card barcodes, and some usage analytics. After the Klarna acquisition, the data collection expanded significantly as Stocard was woven into Klarna's advertising and shopping infrastructure. By the end, using Stocard meant feeding data into Klarna's personalization engine.

CardWarden collects your email for account creation and anonymous analytics (OS version, device model, app version - no advertising IDs). Your card data is encrypted and unreadable by the server. The business model is straightforward: subscriptions and one-time purchases. No ads, no merchant commissions, no data monetization.

Pricing

Stocard was free. It made money through in-app offers, retailer partnerships, and eventually Klarna's broader monetization strategy. That is a legitimate model, but it is also what led to the app being absorbed into a shopping platform.

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, so those tiers are subscriptions. The offline tier is one-time because it does not generate ongoing server costs. The upside of a paid model is independence - CardWarden does not need to be acquired by a bigger company to survive, and it will never pivot into a shopping platform because that is not what pays the bills.

Frequently Asked Questions

The Bottom Line

Stocard was a great app. It solved a real problem for millions of people, and it did it with a simplicity that most apps never achieve. But it is gone now, and its users were left scrambling.

CardWarden was built by someone who missed Stocard and decided to build what should have come next. It keeps the core experience - easy scanning, offline access, clean card organization - and adds real encryption, family sharing, gift card management, and data export. It is designed to be something Stocard never was: an app that cannot be pulled out from under you because the business model does not depend on being acquired.

If you are a former Stocard user looking for a new home for your cards, CardWarden was built for you.