Everything you bet on, in one place
Built to be read at a glance: one number leads, and every position is a tap away.
Log a bet in seconds
Search Kalshi and Polymarket, Polymarket US included, or paste a market link. Pick your side and say what you put in. Kesin tracks the price, your profit and when it settles.
- Live P&L, priced from the real order book
- Your value over time and what resolves next
- Watch markets before you're in, with a push when one crosses your line
Find the leaks in your betting
Kesin reads your finished bets and finds what's quietly costing you money, so your next bet can be a better one.
- Ready at ten finished bets
- Ranked by what each one costs you
- Keeps watching as your bets finish
Found in your own record, never picks or financial advice.
Or connect, and it fills itself in
Connect your account and your positions come in on their own. Bring in your finished bets too, for a full record from day one.
- Kalshi with a read-only API key that stays on your iPhone
- Polymarket with just your public wallet address
- Your first sync and history import from each exchange are free
Your Kalshi key stays on your iPhone and is never stored on our servers. Kesin checks it with Kalshi each time it syncs and refuses one that can trade. Polymarket US accounts have no wallet address, so they can't connect yet; their bets log by hand in seconds.
Free to track. Premium to go deeper.
Logging and tracking are free for good. Premium adds Leaks, keeps your accounts in sync, and the rest.
Good to know
Does Kesin place trades for me?
No. Kesin tracks, explains and journals. It reads your positions but never places, changes or closes a trade. You trade on Kalshi or Polymarket directly.
Do I have to connect my account?
No. Search for a market or paste its link, say what you put in, and Kesin tracks the bet from there. Logging bets is free and always will be; connecting is there if you'd rather your positions came in on their own.
How does account sync work?
For Kalshi, a read-only API key that stays on your iPhone; for Polymarket, just your public wallet address. Your first sync and history import from each exchange are free. With Premium, Kalshi syncs every time you open Kesin, and Polymarket stays up to date even while the app is closed.
Does Kesin work with Polymarket US?
Yes, for logging: search Polymarket US markets or paste a polymarket.us link, and Kesin tracks the price and settles the bet when the market does. Polymarket US accounts have no public wallet address, so they can't connect for automatic sync yet.
Is my Kalshi API key safe?
Your key stays on your iPhone, in the Keychain, and is never stored on our servers. When Kesin syncs, the key is sent securely to read your positions and forgotten right after, and Kesin checks it with Kalshi every time: a key that can trade is refused. Disconnecting or signing out removes it from your iPhone, and you can revoke it on kalshi.com at any time.
What does Premium cost?
$4.99 a month, or $41.99 a year (30% less than paying monthly). You're billed through your Apple ID and can cancel any time in your App Store settings.
Is Kesin on Android?
Not yet. Kesin is on iPhone today.