Get notified when your wallets receive crypto
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.
11 wallets being watched right now
Create a key
Tap once to get a personal key. That key is your account, so save it somewhere safe.
Add addresses
Paste in the addresses you want to watch. Cointer only reads public blockchain data, so your funds are never at risk.
Get notified
When a deposit comes in, you get an alert on your phone, in Discord or Slack, through ntfy, or by email.
Features
No accounts
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
Cointer just reads public blockchain data. It never has your private keys and can't move your money.
Only new deposits
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
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
See every deposit in your own currency, with daily, weekly, and monthly totals broken down by asset.
Open source
The backend, web app, and mobile app are all on GitHub.
Supported chains
We add more chains over time. Donations help speed that up.