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Book Of 99

Book Of 99

Naija Games
4.0 ★★★★★★★★★★ 559K reviews • 500K+ Downloads • 12+ Rated for 12+
Contains ads In-app purchases
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About this app

What is Book Of 99?

HLTV corroborated this, highlighting its editorial tone as adult-oriented.

The ASA reviewed whether the ads were directed at under-18s through their placement or content. Its rules prohibit advertising through media where more than 25% of the audience is likely to be under 18. 

While the audience data did not conclusively define the website’s age demographics, the regulator noted small percentages of under-18s in HLTV’s social channels but found the website’s content and presentation clearly targeted adults.

About Book Of 99

The pure-play prediction market-operators, Polymarket and Kalshi, emerged from Week 1 as the clear winners. On one hand, Kalshi’s market share lead narrowed over its competitors, falling to 82% for the week ended 13 September, down from 86% a week earlier.

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%.

About Book Of 99

The DRC is perceived by many as a gambling market with significant potential, owing largely to its population well in excess of 100 million people.

Yet tax collection continues to plague the sector’s progress.

Last year, the DRC’s Minister of Finance Doudou Fwamba estimated iGaming operators generated around $1.7 billion in annual revenue, yet contributed approximately $1 million in taxes.

App info

Updated onMar 26, 2026
Size115 MB
Installs500K++
Current Version1.9.5
Requires Android9 and up
Content RatingRated for 12+
Interactive ElementsUsers Interact
Released onMay 24, 2025
Offered byNaija Games
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