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Twenty One

Twenty One

Arena Gaming
4.7 ★★★★★★★★★★ 798K reviews 500K+ Downloads 18+ Rated for 18+
Contains ads In-app purchases
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About this app

About Twenty One

By looking at four major gambling companies – Entain, Flutter, DraftKings and MGM Resorts International – it becomes clear why the sector should not be treated as a single trade.

Flutter has arguably the strongest online franchise of the four. Its share price fell from $282.33 on 18 September 2025, to $89.56 on 18 September this year, with a market valuation of $15.54 billion.

FanDuel remains the leading US sportsbook, while Flutter’s international businesses provide additional sources of growth. But that quality comes with high expectations.

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Being a state-owned monopoly is beneficial for RG purposes. You don’t have an employer or shareholders expecting a positive quarterly earnings report four times a year, and as long as the business is self-supporting it can continue to make the best choices for player health and relationships. As Petra defines it: “It’s about a healthy long-term relationship.”

Holland Casino has a responsible gambling board, which includes scientists, experts with lived experience and their own RG executives. They meet with the board every few months to talk over current processes, and the board challenges the operator’s ideas and implementations, pushing them to do better.

“They challenge us both from an academic side and a more practical side. We try to develop our rules as we go along but you have to prove every single day that you’re doing all that you need to do on responsible gaming,” Petra notes.

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Liquidity can consequently become self-reinforcing. Market makers gravitate towards platforms offering dependable technology and substantial order flow, while their participation improves pricing and execution for consumers.

Sahil Patel, founder of competitive intelligence provider Aldrin AI, said those relationships help explain Kalshi’s position.

“A lot of market makers want to go where there’s liquidity,” he said, adding that platform stability and Kalshi’s investment in the financial side of its market-maker relationships were also important. “I think Kalshi is a freight train that’s just kind of running away with it.”

App info

Updated onAug 22, 2026
Size22 MB
Installs500K++
Current Version5.2.2
Requires Android8.0 and up
Content RatingRated for 18+
Interactive ElementsUsers Interact
Released onMay 29, 2024
Offered byArena Gaming
100 Bulky Dice10 Power Hot