When you connect a dApp to a software wallet and click "Approve", you're giving that contract permission to move tokens from your address. That permission is called a token allowance (or token approval). Approvals are normal and necessary for DeFi actions like swaps, staking, or liquidity provision. But they can also be exploited if a contract is malicious or compromised.
Should you revoke approvals regularly? Not always. But you should routinely check approvals for the dApps you no longer use, and avoid blanket "unlimited" approvals when a one-time allowance would do.
(What I've found: a single careless approval can open the door to a large, irreversible loss.)
On EVM‑compatible chains most tokens implement an approve/allowance model. You call approve(spender, amount) and the token contract records allowance[owner][spender] = amount. Unlimited allowances (a very large number) let contracts pull tokens without further confirmations.
BEP‑20 (Binance Smart Chain) and ERC‑20 behave similarly. The only way to remove an allowance is to submit another transaction that updates that stored value (typically setting it to 0 or to a lower amount). That update costs gas and appears on‑chain.
Short answer: the mobile app itself does not include a built‑in approvals manager that can change all on‑chain allowances from inside the app UI. Instead, the common approach is to use WalletConnect or the in‑app dApp browser to connect to an approvals checker (for example a dedicated approval tool or block explorer) and then sign a revoke transaction from the wallet.
And yes, that means you will pay gas to clear approvals. There is no magic workaround.
If you prefer a wallet with an integrated approvals dashboard, check the revoke-approvals-and-allowances resource for general options and tools.
Below are three practical methods. Use whichever matches how you originally connected to the dApp.
Safety notes: always verify the approval tool URL and check the contract addresses shown. Do not share your seed phrase or private keys.
This method is handy when the desktop UI lists more detail (transaction gas estimates, token icons) and you prefer a larger screen for review.
Some block explorers offer token approval checking tools. These typically also allow revocation via WalletConnect. If an explorer supports it, connect with WalletConnect and revoke approvals the same way.
(Image placeholder: screenshot of approvals list connected via WalletConnect (placeholder))
Want to disconnect PancakeSwap (or any dApp) from your wallet session? Two options:
But remember: disconnecting a session does not automatically revoke token allowances. A session disconnect prevents live interactions, but the contract may still have spending approval on your tokens until you revoke it.
For a focused walkthrough on PancakeSwap interactions see the pancakeswap-trust-wallet guide.
Revoke transactions cost gas. On Ethereum mainnet that might be expensive during congestion; on a Layer 2 or BSC it will be lower. Timing matters. If gas is very high and the approval is small, you might accept the risk short‑term.
Unlimited allowances are convenient for frequent swaps (no repeated approve transactions). But they increase risk if the counterparty contract becomes malicious. My rule of thumb: for small, one‑off swaps approve the exact amount. For trusted, high‑frequency flows consider limited unlimited approvals (but monitor often).
You can also set allowance to a small sentinel value (0) then re‑approve a measured amount later. That creates two transactions but reduces the window of exposure.
If you suspect a transaction is malicious, stop and research the contract address via a block explorer and check community forums before signing anything.
| Feature / wallet type | Mobile app (mobile‑first) | Browser extension | Smart‑contract wallet |
|---|---|---|---|
| Easy mobile dApp connections | Yes (native / WalletConnect) | Limited | Variable |
| Local private keys (non‑custodial) | Yes | Yes | Can be account‑abstraction based |
| Built‑in approvals manager | Often no | Some do | Often more granular session control |
| Best for daily swaps on phone | Yes | Good for desktop trading | Better for advanced access control |
| Gas optimization / batching | Depends | Often better tooling | Can support gasless or session keys |
This table highlights trade‑offs. If you use a phone as your primary interface you'll value WalletConnect and a solid dApp browser (see dapp-browser-walletconnect).
Q: Is it safe to keep crypto in a hot wallet?
A: Hot wallets trade off convenience for security. They are fine for active DeFi use but hold only what you need. For long‑term storage, a hardware wallet is safer. See security-features for more.
Q: How do I revoke token approvals?
A: Use an approvals checker via the in‑app dApp browser or WalletConnect, review allowances, then submit revoke (set to 0). This guide above explains the steps.
Q: What happens if I lose my phone?
A: If you lose your phone, anyone with it could access your wallet unless it's protected and not restored with your seed phrase. Restore from your seed phrase on a new device and follow lost-phone-recovery.
Q: Should I revoke everything immediately?
A: Not necessarily. Revoke what you don't use or what poses risk. Balance gas cost against exposure.
Q: How do I revoke unlimited allowance?
A: Use an approvals tool and set that allowance to 0 (or a smaller amount). That triggers an on‑chain transaction and costs gas.
Rechecking and revoking token approvals is a small habit that reduces exposure in DeFi. It costs a bit of gas, but the peace of mind pays off. In my experience, a monthly check of approvals (or after interacting with a new dApp) is a sensible routine.
If you want hands‑on walkthroughs, see the mobile install and setup pages: install-iphone and install-android. For more on WalletConnect flows, check walletconnect-guide. And if you ever run into a suspicious contract, read phishing-and-scams before signing anything.
Safe trading and careful approvals — you'll thank yourself later.