Gamby, #1 free sports prediction app, launched an in-app community with Octopus Community’s Flutter SDK alongside its existing Discord server, so players could share their picks and debate results without leaving the app. In 12 weeks, the in-app community reached 1.6x as many members as Gamby’s Discord gathered in three years. In an A/B test against a holdout group, players with community access also showed 20.5% higher week-2 retention.
37% more app sessions per user for community members vs. the holdout group, since launch
30% higher day-one retention for community members, steady across August and September
20.5% higher week-2 retention for community members
24% more time spent in-app for community members
Exceptional results on iOS, with +56% app opens and +25% W2 retention
Gamby is a free sports-prediction app in which players, instead of real-money betting, use free daily tokens to predict football and other sports results and can win real rewards: a format that has drawn more than 250,000 players. The app runs on Flutter and is rated 4.8/5 on the App Store.
Before Octopus Community, Gamby's most engaged fans gathered on an external Discord server, moderated day to day by a mix of paid staff and highly involved volunteers. Discord gave Gamby a place for fans to talk, but no way to measure whether that talk translated into more time in the app itself, and no way to connect a specific prediction directly to the conversation about it.
Gamby integrated the Octopus Community Flutter SDK directly into Gamby's existing app, going live on 15 July 2026, timed just ahead of a major TV campaign around a France international match. Players join the community automatically with their existing Gamby account: no new login, no separate profile.
What's inside the integration:
Each pick in the app opens its own discussion thread, published automatically under the "Coach Gamby" profile. Players no longer need to start a conversation from scratch: they land on the exact match they bet on, see what others predicted, and react.
Players love recruiting for their private leagues, but league codes would quickly flood the main feed. Instead of deleting them, Gamby's moderation rules automatically move any post sharing a league code into a dedicated "Share Your League" group, where players looking for a league actually go. Announcement, refunded-picks and good-deals groups are admin-only, with comments open to all, so official information stays easy to find.
Gamby turned its community into a review engine: players who leave a 5-star review on the store are automatically rewarded in Gambz, the app's in-game currency, and their review screenshot is shared in a dedicated group. The app is rated 4.8/5 on the App Store.
Players can freely discuss picks and results, the whole point of the app, while referral codes are blocked. AI moderation, backed by Octopus's moderation team, handles day-to-day review.
Gamby’s fans were already talking about their picks on Discord. Because the community lives inside the app itself, there’s no extra download, no separate login, and no friction to join, so far more players end up visiting it than ever found their way to Gamby’s Discord server: in 12 weeks, 1.6x Discord’s three-year total. Every conversation now happens where Gamby’s business happens, tied to the predictions themselves. The result shows up directly in the app: players with community access open it 37% more often and are 20.5% more likely to still be playing two weeks later.
Gamby's in-app community reached 1.6x its Discord audience in 12 weeks. A/B tested: 37% more app sessions and 20.5% higher week-2 retention.
A simple before-and-after or user-segment comparison can be misleading, since the people who seek out a community may already be more engaged players. Gamby's test held back a matched group of otherwise identical users from community access, so the lift measured is caused by the community itself, not by the kind of player who joins one.
Gamby's rules are deliberately specific to its category: players can discuss picks and match results with each other freely, since that is the entire point of the app, but sharing referral codes is blocked outright. That distinction, rather than a blanket restriction on prediction talk, is what keeps the community useful without crossing into promotion Gamby does not want to host.
Gamby's Discord remains home to its most engaged fans, but it lives outside the product: no link to app usage data, no way to connect a specific prediction to the conversation about it, and a ceiling on how many players will ever join a separate app. The in-app community reaches every player with no extra download or login, and its impact shows up directly in Gamby's own retention. In 12 weeks, the in-app community reached 1.6x as many members as Gamby’s Discord gathered in three years.
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