Solana Mobile has announced CLOCK IN, its third hackathon, running from September 8 to October 8 with $135,000 in total prizes for developers building mobile-first applications for the Solana ecosystem. The competition is organized by RadiantsDAO and supports development for the Seeker Android device, Solana Mobile Stack and dApp Store. Ten grand-prize winners will receive $10,000 each, five honorable mentions will receive $5,000 apiece, and a separate $10,000 SKR bonus will recognize the strongest Solana Mobile Stack integration. Winners can also receive Seeker devices, dApp Store placement, marketing support and one-on-one consultations with Solana co-founder Anatoly Yakovenko. CLOCK IN follows Solana Mobile’s first 2025 hackathon, which offered a $100,000 prize pool, and MONOLITH, which ran for five weeks and concluded in early March 2026. The latest event description says MONOLITH received more than 400 completed submissions from teams in 66 countries, while the earlier topic record cited 888 signups and 403 completed submissions and described participation as up 43%; the new account puts the increase at 44%. Entrants must produce a functional Android APK, integrate Solana Mobile Stack and Mobile Wallet Adapter, interact meaningfully with Solana, and submit source code, a demo video and a pitch deck or presentation. Judges will score stickiness and product-market fit, user experience, innovation and X-Factor, and presentation and demo equally. SolanaFloor and Solana Mobile’s next Shipped livestream on September 9 will feature Emmett Hollyer, RadiantsDAO and BackYard Finance ahead of the hackathon.