# Overview

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H4 is a non-custodial iOS trading app for perpetual futures on Hyperliquid. It gives users access to more than 300 markets across stocks, indices, crypto, commodities, FX, and pre-markets from more than eight DEXes.

H4 standardizes the interface around U.S. dollars so that account value, volume, open interest, order value, position value, and PnL can be read consistently across markets.

Orders are submitted using builder codes with a 0.055% fee on notional.

## Non-custodial status <a href="#non-custodial-status" id="non-custodial-status"></a>

H4 is a non-custodial trading interface for Hyperliquid markets, including Hyperliquid Core and HIP-3 DEX markets.

### What non-custodial means <a href="#what-non-custodial-means" id="what-non-custodial-means"></a>

H4 is an interface layer that connects users to Hyperliquid markets, including **Core** and other **HIP-3 DEX** markets. It does not custody user funds, pool balances, or take control of user accounts. The app has no ability to reverse transfers, recover lost access, or undo actions once they are confirmed.

### What this means for you <a href="#what-this-means-for-you" id="what-this-means-for-you"></a>

* Your funds stay under your control at all times.
* Your account is tied to your wallet, so you are responsible for access, security, and key management.
* H4 does not hold your funds for you. Deposits, withdrawals, swaps, and trades happen through your own account on supported rails and markets.
* If you lose access to your wallet or private key, H4 cannot recover your funds for you.
* You can export your private key from the **Export** page.


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