PrizePicks Explodes While Underdog and Fliff Collapse: DFS App Store Shake-Up Post-NBA Season 2024-25
With the end of the 2024–25 NBA season, I took a close look at how the top 10 Daily Fantasy Sports (DFS) and Social Sportsbook apps performed on the iOS App Store during the season
Between H1 2024 and H1 2025, the total iOS downloads for the selected panel of 10 DFS and Social Sportsbook apps grew from 13.1 million to 22.5 million — an increase of 9.45 million downloads, representing a 72.2% year-over-year growth.
Apps Analyzed:
PrizePicks
Underdog
Fliff
Sleeper
Dabble
Chalkboard
Rebet
ParlayPlay
Betr
Boom Fantasy
The DFS and social sportsbook app market is no longer a free-for-all—it’s becoming a winner-takes-most environment. PrizePicks is lapping the field. Once considered a legitimate contender to PrizePicks, Underdog has seen a steep decline in downloads and market momentum. In terms of YoY share, the drop is stark—suggesting either a misfire in product positioning or faltering user acquisition strategies.
Key Takeaways
1. PrizePicks Is Running Away With the Market
In H1 2025, PrizePicks captured approximately 65.7% of the total iOS downloads among the top 10 DFS and Social Sportsbook apps analyzed and has become the de facto leader. This isn't growth—it's dominance. Their paid user acquisition, aggressive influencer strategy, and frictionless UI have vaulted them into monopoly territory.
2. Underdog Fantasy Is No Longer in the Conversation 📉
While still a major player, Underdog saw a 30.5% decline in H1 2025 (YoY), dropping from 5.7M to 4M downloads. It’s evident PrizePicks has not only overtaken but widened the gap rapidly.
3. Fliff Fell Off a Cliff
Once a buzzy entrant, Fliff experienced the sharpest decline of all, with a 72.8% drop YoY — falling from 3.5M downloads to just under 1M. This signals major issues in either retention, UA strategy, increasing competition or product interest.
4. Rebet & Boom Fantasy Are Quiet Climbers
Among all challengers, Rebet and Boom Fantasy are the only apps that increased their market share. Rebet's momentum continues from a strong H2 2024, and its expansion into Casino content seems to be paying off. Their branding, social reach, and product expansion are clearly visible in their marketing pushes across paid channels.
🎰 Rebet’s Casino Strategy Is Paying Off
After a strong finish to 2024, Rebet has maintained its upward trajectory in 2025. Their growth seems tightly correlated with their expansion into casino-style offerings—an area where they’ve clearly leaned in with targeted marketing campaigns. The result? Continued download growth and an increasing slice of the DFS/social gaming pie.
Source: Proprietary RMGS, powered by Apple, Mobile Action and AppFigures