The short version. Arbiter has no accounts and no servers of ours holding your data. Your keys, seed phrase and PIN never leave your device. But the app does talk to third parties to work — and your wallet address goes to them.
1. What we collect
We do not operate a backend that stores your personal data. There is no sign-up, no email required, no password, and no profile. We do not ask for your name, address or identity documents.
2. What stays on your device
- Your seed phrase and private keys, held in the device's secure storage. They are never transmitted anywhere.
- Your PIN or biometric setting.
- App preferences — display settings, node choice, which tokens you show.
- A local cache of balances and transaction history read from public blockchain data.
Uninstalling the app deletes all of it. Because it never leaves the device, we cannot recover any of it for you.
3. What is shared with third parties
Arbiter cannot function without contacting external services. What each one receives:
Hyperliquid
Your wallet address, and the details of every order you place — market, size, price, leverage, and any stop-loss or take-profit. This is necessary to trade, and orders are signed by your device and sent directly to Hyperliquid. Your address, positions and trading history are recorded on Hyperliquid's public ledger. Orders also carry Arbiter's builder code, which is how the fee described in our terms is attributed.
On-ramp providers
If you buy crypto with a card or bank transfer, you are handed to a regulated third-party provider. They receive your wallet address and the amount, and they will collect identity and payment information directly from you under their own privacy policy. That information does not pass through Arbiter and we never see it.
Exchange providers
When you swap, the providers we query receive the pair, the amount, and the destination address in order to quote and settle. Different providers apply different identity requirements; some ask for none.
Blockchain nodes
Reading your balance and broadcasting transactions means sending your wallet address to a public Arbitrum node. As with any wallet, the node operator can see that an address was queried and from roughly where.
Price and market data
Exchange rates and market data are fetched from public APIs. These requests carry no wallet address.
4. Crash and error reports
If the app crashes, a diagnostic report containing device model, operating system version and a technical stack trace may be sent so the fault can be fixed. These reports are not intended to contain your address, balances, keys or seed phrase.
5. What is public by design
Arbitrum and Hyperliquid are public networks. Your address, balances, transactions, open positions and trading history are visible to anyone who looks, permanently, whether or not you use Arbiter. This is a property of the blockchain, not of this app.
6. Children
Arbiter is not intended for anyone under the age of majority in their jurisdiction, and we do not knowingly collect information from them.
7. Your choices
- Don't want an address shared with an on-ramp? Don't use Buy — fund the wallet by transferring in instead.
- Don't want Hyperliquid to have your address? Use Arbiter as a wallet only and don't deposit to trading.
- Prefer a different node? Change it in Settings → Nodes.
- Want everything gone? Uninstall. Save your seed phrase first — it is the only way back to your funds.
8. Changes
We may update this policy. Material changes will be reflected in the "last updated" date above.