Cointer - Get notified when your wallets receive crypto<br>Get notified when your wallets receive crypto<br>Add the addresses you want to watch and Cointer will send you a notification when they receive a deposit. No sign up, and it never touches your funds.<br>Open the appRead the docs<br>App StoreGoogle Play<br>5 wallets being watched right now

Create a key<br>Tap once to get a personal key. That key is your account, so save it somewhere safe.

Add addresses<br>Paste in the addresses you want to watch. Cointer only reads public blockchain data, so your funds are never at risk.

Get notified<br>When a deposit comes in, you get an alert on your phone, in Discord or Slack, through ntfy, or by email.

Features<br>No accounts<br>You don't sign up with an email or password. You get one personal key, and we only store a hash of it, so there's nothing linking it to you.

Never touches your funds<br>Cointer just reads public blockchain data. It never has your private keys and can't move your money.

Only new deposits<br>When you add an address, old transactions are ignored. You only get alerts for deposits that come in after that.

Alerts where you want them<br>Push notifications on your phone, or ntfy, Discord, Slack, and email. You can test a channel first, and mute one address without muting the others.

Activity feed<br>See every deposit in your own currency, with daily, weekly, and monthly totals broken down by asset.

Open source<br>The backend, web app, and mobile app are all on GitHub.

Supported chains<br>We add more chains over time. Donations help speed that up.<br>BitcoinBTC<br>EthereumETH

Open source<br>All of Cointer's code is on GitHub.<br>Web

The web app. Manage your addresses and alerts from a browser.<br>Mobile

The iOS and Android app. Does everything the web app does, plus push notifications.<br>Backend

The server. Watches the blockchain and sends out alerts. Bun + Hono + SQLite.