Polymarket Review
The world's largest prediction market — iPhone-only in the US
Polymarket is the global heavyweight of prediction markets and now actively available to California traders. For politics, news and culture markets it has the deepest order books on the planet — pair it with Kalshi for full US coverage.
Scorecard
Open Polymarket on iPhone via our link, enter code VENICE at signup, deposit $10 and place qualifying trades to unlock a $50 trading bonus. US residents 18+ where available, including California.
18+ Only. Restrictions and eligibility requirements apply. Not available in all jurisdictions. Trading is risky. 100% loss can occur. See polymarket.com/tos for more information. The Polymarket US App serves as an independent software provider and affiliate of Polymarket US and Polymarket Clearing, the CFTC-regulated exchange and clearing organization.
- Deepest politics & news liquidity in the world
- Cleanest iPhone UX in the category
- Strong $50 welcome bonus on a $10 deposit with code VENICE
- –iPhone-only in the US — no Android or web checkout
Key features
- Largest prediction market by global volume
- Politics, sports, crypto, culture & news
- Available to California residents 18+
- iPhone only in the US (no Android / web)
What is Polymarket?
Polymarket is the world's largest prediction market, where users trade Yes/No event contracts on politics, news, sports, crypto, and culture. Contracts settle at $1 if the event resolves Yes and $0 if No, so the price reflects the live implied probability set by the order book.
Markets and coverage
Politics and news are Polymarket's bread and butter — elections, geopolitics, Fed decisions, corporate earnings calls, awards shows, and cultural events. Sports coverage has expanded rapidly through 2025–2026, and crypto-native markets remain among the sharpest anywhere.
Liquidity and pricing
On flagship politics and macro markets, Polymarket routinely sees the deepest books in the entire prediction market category, with tight 1¢ spreads at size. This is the standout reason serious traders keep an account funded.
User experience
The Polymarket app is fast, modern and arguably the cleanest mobile UX in the category. Order book depth, charts and portfolio P&L are all one tap away, and contract resolution is transparent.
California availability
Polymarket is available to verified California residents. Onboarding, deposits, and trading work from any CA county with no geofencing issues in our testing.
Welcome bonus
Deposit $10 and trade qualifying event contracts to unlock a $50 trading bonus — one of the most generous straightforward welcome offers in the prediction market space right now.
Who Polymarket is best for
Politics traders, macro and news traders, and anyone who wants the deepest global liquidity on event contracts. Pair it with Kalshi for the strongest two-app US setup.
State availability
Polymarket and the VENICE bonus are available to verified US residents 21+ in 50 jurisdictions (49 states + DC).
View all eligible states
- Alabama
- Alaska
- Arizona
- Arkansas
- California
- Colorado
- Connecticut
- Delaware
- District of Columbia
- Florida
- Georgia
- Hawaii
- Idaho
- Illinois
- Indiana
- Iowa
- Kansas
- Kentucky
- Louisiana
- Maine
- Maryland
- Massachusetts
- Michigan
- Minnesota
- Mississippi
- Missouri
- Montana
- Nebraska
- New Hampshire
- New Jersey
- New Mexico
- New York
- North Carolina
- North Dakota
- Ohio
- Oklahoma
- Oregon
- Pennsylvania
- Rhode Island
- South Carolina
- South Dakota
- Tennessee
- Texas
- Utah
- Vermont
- Virginia
- Washington
- West Virginia
- Wisconsin
- Wyoming
Frequently asked
Ready to try Polymarket?
Deposit $10, get a $50 trading bonus with code VENICE
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More for California traders
Sources & references
- 1.Commodity Futures Trading Commission — Event Contracts — CFTC.gov
- 2.KalshiEX LLC — DCM Registration — CFTC.gov
- 3.Kalshi wins court battle to offer election contracts — Reuters
- 4.Prediction markets coverage — Wall Street Journal
- 5.Kalshi & prediction-markets coverage — Bloomberg
- 6.National Council on Problem Gambling — 1-800-GAMBLER — NCPG
External links open in a new tab. We cite primary regulatory and major news sources where possible. Citations to trusted regulators (CFTC, SEC, IRS, NOAA, .gov, .edu) are dofollow; commercial outbound links are not endorsements.
Frequently asked questions
I funded and tested Polymarket personally from a California address before writing this review — no free press access, no operator-supplied account. My background is 15 years in regulated iGaming, including running the Hard Rock New Jersey online CRM launch under a DGE vendor license, so I hold prediction market operators to a real regulated-operator standard. — Catie Di Stefano
Catie Di Stefano has spent 15 years working with online gambling across some of the most regulated and competitive gambling markets in the world.
Starting at Betsson Group in Malta in 2011, she has in recent years worked her way through VIP management, CRM, gamification and marketing leadership across European and North American operations. Catie was a licensed consultancy for Hard Rock Casino in New Jersey, where she held a DGE vendor license and owned the execution of the online CRM program from launch day in 2018.