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Book Of Zulu

Book Of Zulu

Sporty Studios
4.2 ★★★★★★★★★★ 107K reviews • 1M+ Downloads • 12+ Rated for 12+
Contains ads In-app purchases
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About this app

How to play Book Of Zulu

“Looking back over the past two years, the regulation has achieved its primary objective: creating a safer and more transparent market. It has established common standards for all licensed operators, particularly around KYC, AML and responsible gaming, ensuring that customers receive a more consistent experience regardless of the platform they choose.”

Atucha praises the regulation and the regulators themselves for making entry into the market easy, as well as allowing them to be competitive against illegal operators. But the market hasn’t been without its challenges.

A 1% selective consumption tax (ISC) on the value of every online bet has been in force since 1 July 2025, after the original policy was scrapped from proposed regulations in July 2021.

How to play Book Of Zulu

A major advantage for traditional sportsbook operators is their ability to aggressively fund customer acquisition and retention bonuses. As EKG points out, prediction markets have “less ability to be generous with bonuses” because users trade against one another rather than against the house.

That creates a stark contrast during peak football season when traditional sportsbooks spend heavily on promotions. Offers ranging from $350 to $365 from major operators make the $25 to $50 promotional matches typically seen on prediction markets appear modest by comparison.

“That said, channel checks indicate prediction markets are spending heavily on digital marketing, including app stores and pay-per-click advertising, which could make our forecast look conservative by the end of the season,” EKG concluded.

What is Book Of Zulu?

Still, Kalshi had a nine-fold lead over Polymarket, its next closest rival. Polymarket, meanwhile, led the group with 762,000 app downloads, edging Kalshi, DraftKings and FanDuel in the category. The downloads represented a 13,509% weekly increase and 25% of total category downloads, Polymarket wrote in a statement.

Across the market, operators delivered high double-digit gains compared with Labor Day weekend, which featured a full slate of college football games but no NFL contests. Two operators, DraftKings and Underdog each saw triple-digit growth, delivering weekly increases of 125% and 119%, respectively. Three others, Polymarket, Crypto.com and Novig, saw gains of at least 30%, led by Polymarket with a weekly increase of 46%.

One interesting nugget surrounds weekend figures at Kalshi, where volume on Sunday only surpassed prior daily activity by $34 million, BofA data shows. Typically, Sunday volume for the quarter dwarfs that of College Football Saturdays due to the voracious demand for NFL offerings. BofA analyst Shaun Kelley attributes the irregularity to the possibility that Kalshi is “over indexing” on college sports.

App info

Updated onJun 08, 2026
Size74 MB
Installs1M++
Current Version1.9.2
Requires Android5.0 and up
Content RatingRated for 12+
Interactive ElementsUsers Interact
Released onMar 27, 2023
Offered bySporty Studios
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