[020]WatchPolymarket / Kalshi · USWeekly subscription / WhopData as of 2026-11-02
A copy-trading execution tool for Polymarket / Kalshi users, taking a cut of volume
C
Hold off. Don't build a subscription that promises 'follow the big traders and win'. If you do build here, make it an execution tool that takes a cut of fills, or a data layer sold to institutions.The money is real (biggest one July $34,201), but it comes from selling 'wins', not data. Kalshi has already launched copy and order alerts for free, and all three peaked during the World Cup. The two weeks after the 11-03 midterms are the test.Worth studying · Grade and headline drawn from the full text · Next review 11-17
| Background | Kalshi and Polymarket are taking off in the US. A batch of anonymous small tools ranks big on-chain trades and pushes them to retail users, charging weekly. |
|---|---|
| Upside | People pay: the anonymous App Prediction Radar hit #33–41 on the US Finance bestseller chart two months after launch; the web version Polifly makes $30K a month. |
| Demand | Users are buying 'win by following the trades', not the data. A one-star review: 'A 1-star and a 5-star trader are no different. I followed 8 trades and 1 lost.' |
| Competition | Free on the platforms: the Polymarket leaderboard and Kalshi Social (04-24 followers plus order notifications). Plenty of open-source copy-trading bots exist on GitHub. |
| Revenue | TrustMRR verified: Polifly July $34,201, PolyPick July $15,818; PolyAlertHub, which sells alerts, about $900 a month |
| Growth | No ads show up in the Meta, TikTok or Google ad libraries. Growth comes from Whop affiliates, X threads, Telegram groups and platform referral payouts. The funnel is "$1 in the first week" |
| Window | Watch: Kalshi 9-16 acquires Oddpool; CT, WA, MO and other states are cracking down; Polymarket 40 restricted in multiple regions |
| Who it's for | People who can handle on-chain data and order risk control, and who build tools that take a cut of transactions; small data teams that can sell to institutions. Not suited to indie devs building weekly-fee apps |
Latest
- 11-08Prediction Radar charted #22 in Spain and #75 in the UK on the Finance Top Grossing charts for the first time. In the US it dropped from #38 to #41, with a rating of 1,024. It's still a single data point, and no second prediction-market tool has reached the top 100 of the US Finance Top Grossing chart.
- 11-07Prediction Radar enters a second major market for the first time: #22 in Spain's App Store Finance top grossing, #75 in the UK; the US slipped from #38 to #41, ratings count 1,024. Still a single sample, not enough to show the demand survives beyond the event cycle.
- 11-06Prediction Radar enters a second major market's top grossing chart for the first time: #22 in Spain's Finance, #75 in the UK; the US Finance chart edged down from 38 to 41, ratings count 1,024. It is starting to expand into other language markets, but its US ranking is not yet stable.
- 11-05Prediction Radar enters the Spanish-language Finance top grossing at #22 and the UK at #75; over the same period the US fell from #38 to #41, and ratings rose from 1,001 to 1,024, with written reviews still mostly low-star. It is the same tool expanding into new language markets. No second new tool has yet reached the top 100 of US Finance grossing, and Polifly and PolyPick have stopped syncing since October.
- 11-04Prediction Radar 11-03 entered the Spain Finance top grossing chart at #22 and the UK at #75; the US slipped slightly from #38 to #41, ratings rising from 1,001 to 1,024. It is still the only copy-trading tool on the charts; no second product of its kind has appeared.