You can switch blockchain to Sepolia to test Collectify functions before deploy on the mainnet for free.

Sepolia (Ethereum testnet)

Faucet:

https://www.alchemy.com/faucets/ethereum-sepolia

https://faucet.paradigm.xyz/

Etherscan https://sepolia.etherscan.io/

Uniswap (Swap for ERC20 tokens) https://app.uniswap.org/#/swap?chain=sepolia

Base Sepolia (Base testnet)

Faucet:

ETH: https://portal.cdp.coinbase.com/products/faucet

USDC: https://faucet.circle.com/

Etherscan https://sepolia.basescan.org/