CastarSDK — Passive, privacy-first monetization for modern apps

Hi Product Hunt! 👋

As developers, we know how tough it can be to monetize an app without compromising user experience. Ads interrupt, subscriptions can create friction, and not every app suits a paywall.

That's why we built CastarSDK — a lightweight SDK that enables passive revenue by utilizing idle public network bandwidth. Here's what makes it different:

• 🚀 Completely invisible to users (no ads, no pop-ups)

• 🔒 Privacy-respecting: collects only public network data

• ⚡️ Minimal impact on app performance and battery

• 🛠 Easy integration: set up in minutes

Whether you're building a utility app, a game, or any app where a clean experience matters, CastarSDK can help you generate steady income — without changing how users interact with your app.

We're excited to hear your feedback!
Feel free to ask us anything below 👇