Short answer: both are the same non-custodial software wallet under the hood, but they serve different daily workflows. The extension gives the smoothest desktop dApp experience via an injected provider. The mobile app wins when you need on-the-go swaps, QR or deep-link connections, and the convenience of a built-in dApp browser (metamask mobile in-app browser). Which should you use today? That depends on whether most of your DeFi time is on desktop or phone.
And yes, you can use both together and sync accounts; that is often the most practical setup.
I ran parallel tests on desktop and mobile over two weeks. Steps I used so you can copy them:
Screenshots included in my notes: swap modal (alt: placeholder swap modal screenshot), transaction history showing tx hash (alt: placeholder tx history screenshot). These helped me compare approval flows and gas estimation accuracy.
Desktop setup is straightforward. The extension injects a provider into web pages, so almost any desktop dApp will detect it and present a connect pop-up. Daily tasks like approving a token allowance, swapping via the built-in aggregator, or interacting with a lending market are pop-up-driven. The extension integrates cleanly with hardware wallets, which is why many power users prefer it for larger trades.
MetaMask extension daily use is efficient. Want to approve a contract and then interact with a dApp? You get a quick pop-up and the ability to edit gas fees (EIP-1559 fields) before signing.
Pros:
Cons:
Who this is best for: desktop-first DeFi users, hardware wallet owners, traders who need precision on gas fees. Who should look elsewhere: people who never use desktop or who need QR/deep-link connections often.
The metamask mobile experience focuses on convenience. You get biometric lock, a built-in dApp browser that acts like an injected provider when you open a dApp inside the app, and WalletConnect support for external browsers. I tested both modes; the in-app browser behaves like extension injection for most dApps.
But there are differences. On mobile you approve transactions inside the app (with biometrics), and WalletConnect adds an extra QR/deep-link step when connecting from a desktop or other mobile browser.
Pros:
Cons:
Who this is best for: mobile-first users, people who interact with mobile-only dApps, and those who want quick access to DeFi on the move. Who should look elsewhere: heavy traders who rely on Ledger/Trezor or multi-window desktop workflows.
Which to use when? The injected provider (extension) gives real-time, low-friction connections on desktop. WalletConnect is a bridge protocol: you scan a QR or tap a deep link to create a session between a dApp and your mobile wallet. WalletConnect is essential when the dApp and wallet are on separate devices.
Pros of WalletConnect:
Downsides:
Practical tip: if you are on desktop, use the injected provider for speed. If you want to approve actions from your phone or use mobile-only wallets, WalletConnect is the right tool. Want the step-by-step method? See walletconnect-and-mobile-dapps and connect-metamask-to-dapps for walkthroughs.
| Feature | Extension (injected provider) | Mobile (in-app browser + WalletConnect) |
|---|---|---|
| Device workflow | Desktop-first, pop-ups | Phone-first, biometric approvals |
| dApp connect UX | Instant (window.ethereum) | In-app: instant; external: WalletConnect QR/deep link |
| Swap aggregator | Built-in | Built-in (same aggregator) |
| Gas controls | Full EIP-1559 fields | Present, sometimes simplified (see gas-fees-eip1559-and-l2) |
| Hardware wallet support | Strong (Ledger/Trezor) | Limited/indirect |
| NFT viewing | Basic | Mobile-friendly gallery (view-and-manage-nfts) |
| Backup | Seed phrase, export | Seed phrase, biometric lock |
| Best for | Power desktop users | Mobile-first DeFi users |
Hot wallets trade convenience for exposure. I have paid for that lesson once: I approved an unlimited token allowance to a scam contract after not checking the spender address. I revoked the approval and tightened my habit (token-approvals-and-revoke). Here are practical steps I follow now:
But mistakes still happen. When they do, act quickly: revoke approvals, contact dApp support, and consider moving funds to a fresh address (move-crypto-between-wallets-and-exchanges).
Q: Is it safe to keep crypto in a hot wallet? A: Hot wallets are safe for daily use if you practice good security: seed phrase backup, revoke approvals, small balances for daily activity, and hardware wallets for long-term holdings.
Q: How do I revoke token approvals? A: Use the token-approvals-and-revoke guide or a reputable on-chain tool to list and revoke allowances. Revoke from the wallet that made the approval.
Q: What happens if I lose my phone? A: Recover using your seed phrase on another device (recover-lost-wallets). If you backed up and stored the seed phrase securely, restore is straightforward. If not, funds are at risk.
Q: Can I use Ledger or Trezor with mobile? A: Hardware support is best via the desktop extension (ledger-step-by-step-integration). Mobile options exist but often require Bluetooth-capable devices and have more limits.
Which should you use? If most of your DeFi life is on desktop and you use a hardware wallet, start with the extension. If you live on your phone, appreciate biometric unlock, or need the in-app browser for mobile dApps, use the mobile app. Or do both and sync accounts for flexibility.
Want step-by-step help? Start with install-metamask-chrome or install-metamask-mobile, then follow connect-metamask-to-dapps and metamask-swaps-and-dex-aggregator. If you are concerned about approvals, read token-approvals-and-revoke and backup-and-recovery-seed-phrase.
If you want a tailored suggestion based on your daily routine (desktop trader, mobile staker, NFT collector), ask me and I will outline a 2-week workflow to test which setup fits you best.