10 % EXTRA en todo Tangem. Hasta 25 oct
Download the Tangem app
From the App Store or Google Play. Free, no signup.
How to buy K21
- Non-custodial
- Private keys are yours
- +1M users
- 4.9 on App Store
Buy K21 quickly on your phone without an exchange or signup. Tangem is a free, non-custodial wallet for iOS and Android. Buy K21 with Apple Pay, Google Pay, Venmo, PayPal, or cards
How to buy K21 right now
The fastest way to buy K21 is directly inside the Tangem – no account, no waiting.
Create your K21 wallet
You own the private keys. No one else can access them.
Buy K21 instantly
Pay with Apple Pay, Google Pay, card or bank transfer.
Why buying K21 in a self-custody wallet is safer
When you buy K21 on an exchange, the exchange holds your funds. If the exchange is hacked, freezes withdrawals, or goes bankrupt, your K21 is at risk. Tangem ensures that doesn't happen to you.
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!!Own!! your money
Keys are generated and stored in the Secure Enclave (iOS) or StrongBox (Android).
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!!Secure!! your assets
The Tangem app has been reviewed by third-party researchers such as Cure53.
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!!Upgrade!! any time
Back the wallet with a Tangem card or ring on an EAL6+ certified secure element.
What you can do with K21 in Tangem
Send K21 to any wallet address
Move K21 across Ethereum, Tron, BNB Chain and more — no KYC, no middlemen
Cold storage in your pocket. Tap to secure. Tap to spend.
Private keys never leave the card's secure chip — no exposure, no online risk
Swap K21 for other assets directly in the app
Compare rates from DEXs and CEXs automatically — no external account needed
Earn with it by connecting to dApps and DeFi protocols
Access yield on Aave and other protocols without handing over your keys
Fees and limits when buying K21
Completely zero fees to hold or send K21 in Tangem
0.5-1%
On-ramp fee
Charged by the payment provider. Shown clearly before you confirm.
Rates and minimums vary by provider and region, and are displayed clearly in-app before checkout
$0.10-0.25
Network fee
Paid to K21 miners or validators to process your transaction
This varies with network congestion and is shown before you confirm
Limits depend on your region and the payment provider. Tangem works with multiple on-ramp partners so you can compare options before buying.
Buying K21 with Tangem
Here we've answered some of the most common questions we received
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No. Tangem lets you buy K21 directly in the app using Apple Pay, Google Pay, and more payment options. You never need to create an exchange account or go through a separate verification process to get started.
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No. Tangem is fully self-custodial. Your K21 is stored on the secure chip inside your Tangem card, and only you hold the private keys. Tangem never has access to your funds.
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Most purchases complete within a few minutes. Once the payment is approved by the provider, your K21 is delivered straight to your Tangem Wallet.
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Your K21 is stored on your Tangem card, not on your phone. Simply install the Tangem app on your new device and tap your card to regain full access to your wallet.
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Your Tangem Wallet already is cold storage. The private keys for your K21 are generated and kept on the card's secure element and never leave it.
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KYC requirements depend on the payment provider and the amount you're purchasing. For small purchases of K21, many providers allow you to buy without verification.
Holding a lot of K21? !!Upgrade!! to cold storage
The app already gives you a secure, non-custodial wallet most people never need to go beyond. If you hold a significant amount, pair a Tangem card and your keys move to an EAL6+ certified element managed from the same app.
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The Tangem app gives you a secure, non-custodial wallet. If you are holding a significant amount of K21 and want your keys offline and safe, Tangem wallets are built for that
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Pair a card with the app, and your wallet migrates to a secure EAL6+ certified element. You manage everything through the Tangem app and your keys live on the hardware
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Tangem is a Swiss-based company and has been building self-custody wallets since 2017. Our products have been independently audited, certified, and reviewed by security researchers and major crypto media
