For a quick view of what is happening across the whole multi-chain landscape, DappRadar is the broadest free source available. It covers dapps, NFT collections, DeFi protocols and games across more than fifty networks.
The metric to be careful with
Unique active wallets is DappRadar's signature number and the easiest to distort. An airdrop farming campaign generates thousands of fresh wallets performing minimal transactions, which registers identically to genuine users. Rankings driven by that metric routinely feature applications whose activity is almost entirely incentive-driven.
How to use it well
Read the composition rather than the rank: transaction value alongside wallet count, retention over time rather than a single day, and whether activity persists after an incentive programme ends. The data supports that analysis; the default presentation does not encourage it.
Features and cost
Free access to most dashboards, with portfolio tracking, alerts and paid API tiers. Coverage of smaller chains is better than any competitor's.
Who should use it
Anyone surveying activity across many chains, particularly on networks the specialist tools ignore. Cross-check anything important against DefiLlama for DeFi or CryptoSlam for NFT volume.