Pay with USDC. No gas. No noise.

Send and receive USDC. The fee is paid in USDC itself.

Download on the App Store Coming soon
GET IT ON Google Play Coming soon

Coming to iPhone, Android, and Web. iOS is the reference build.

Just pay with USDC. That's it.

A dead-simple wallet for sending and receiving stablecoin dollars. No gas tokens. No hunting for your money.

Just pay with USDC. That's it.

Send and receive USDC simply. Your money is stablecoin dollars. One balance, clear and always visible.

No gas tokens, ever.

You pay the network fee in USDC itself. Never buy or hold ETH, SOL or other gas coins just to move your money. This is the killer feature.

You always find your money.

One clear balance. One Send. One Receive. Unlike wallets that bury your balance under charts and tabs, here it's right in front of you.

It's yours.

Self-custody. Keys live on your device. Face ID and PIN protect access. No one else can reach your funds.

No trading terminal. No charts. No noise.

A wallet that pays — and stays out of your way.

No price charts or trading tools
No swaps for profit or DeFi yield farms
No NFT gallery or collectibles
No airdrop hunting or meme-coin casino
No feed of tokens you never asked for

If you found other wallets overwhelming, this one is intentionally simple.

How paying works

Three steps. Fee paid in USDC. No extra coins required.

1

Have USDC

Your balance shows clearly in one place.

2

Send

Enter amount and address, or scan QR. Or receive by sharing your code.

3

Done

Confirm with Face ID or PIN. The fee is paid from your USDC. That's it.

Under the hood

For the technically curious — Circle rails and gasless self-custody

Sigma9 is built for real USDC using Circle infrastructure.

  • Circle CCTP v2 for cross-chain: canonical USDC burn on source, mint on destination. No wrapped tokens.
  • Circle Paymaster fronts gas; you pay the fee in USDC via permit. No native gas token required.
  • Gasless account abstraction for both same-chain sends and cross-chain transfers.
  • Self-custody: BIP39 seed, keys derived and stored only on your device (iOS Keychain with Face ID + PIN).

Gasless USDC send and gasless cross-chain transfers (CCTP v2) are live and verified on mainnet. App store release coming soon.

Supported on Arbitrum, Base and Solana mainnet (working cross-chain between EVM and Solana). One EVM address across EVM chains. Arc mainnet support coming after launch.