HyperSeed on your phone

HyperSeed runs on phones in two forms, both from Get the app. Both open on Favorites: the apps you starred, their raise, and a Back button. Neither holds a key or funds: your wallet app signs every backing and every claim, and the site only builds the transaction.

Android: the APK

A signed Android app (package app.hyperseed.mobile, Android 7.0 or later) that opens www.hyperseed.app full screen, so a site update reaches the app without a new download. The download page prints the file's SHA-256 and the signing certificate's; check them before you install. New versions are signed with the same key and install over the old one.

In the app, Connect wallet uses Solana Mobile Wallet Adapter: Android opens the wallet app you pick (Phantom, Solflare, Backpack or any wallet that speaks the protocol), you approve there, and the wallet answers the app over a local session on the phone. Backing asks the wallet to sign and send the USDC transfer; claiming asks it to sign the claim message. Each step opens the wallet once. Nothing opens a wallet before you tap.

iPhone: the Home Screen app

1. Open www.hyperseed.app in Safari.
2. Tap Share, then Add to Home Screen (on recent iOS, Share sits under the ••• button).
3. Open HyperSeed from the Home Screen: it starts full screen on Favorites, with tabs at the bottom.

iOS hands a wallet app's answer to Safari, never to a Home Screen app, so a wallet cannot finish a request started there. In the Home Screen app, Connect wallet offers Open in Phantom or Open in Solflare: HyperSeed opens inside the wallet's own browser, with your favorites carried in the link, and you connect, back and claim there as on a computer.

Phone browsers: Safari and Chrome

In a phone browser with no wallet built in, Connect wallet lists Phantom and Solflare. The page sends the request to the wallet app with its deeplink protocol: a key pair made for this connection (x25519), the request encrypted to the wallet, and a return address on this site. The wallet answers by opening that address with an encrypted reply that only this browser can read. Connect, sign the backing (the site then sends it to Solana), and sign the claim message all work this way. The key pair and the wallet's session stay in this browser's storage.

Favorites

The star on every app card and raise panel keeps the app in Favorites. The list lives on the phone only (hyperseed:favoritesin the browser or app storage), is never sent to HyperSeed, and goes away with the app or the site data. On the Android app and the Home Screen app, Favorites is the first tab.

What it does not do

• No push notifications: a raise opening or a tranche unlocking shows on Favorites the next time you open it.
• No wallet inside the app: if no wallet app is installed, Connect wallet says so.
• The iPhone app is the Safari Home Screen app; there is no separate iPhone download.