Reply Radar is a playful, personal project built to help people keep track of the messages they still need to reply to — because we all know how easy it is to read something, get distracted and then forget to respond for days (or... weeks 👀).
This app exists for anyone who's ever said, “Oops, I meant to reply to that!” and wants to stay on top of conversations without guilt or chaos. No more ghosting your friends by accident. No more losing important messages in the middle of your busy day.
With Reply Radar, your forgotten replies are finally on the radar.
A gentle nudge. A little order. A friendlier inbox — on your terms.
Don’t leave your replies floating in space — keep them on the radar.
Even though I’m an Android developer by trade, I decided to build Reply Radar using Kotlin Multiplatform as a learning experiment.
The idea was to explore modern shared code strategies while keeping things familiar with an Android-first mindset.
This project uses common architectural patterns and tools you’d expect in an Android codebase — like Jetpack Compose, Room, Coroutines and MVI — but wrapped in a multiplatform structure ready to evolve across Android, iOS and even Desktop.
It’s a playground, but also a showcase of how Kotlin can unify experiences across platforms with elegance (and fewer bugs 🤞).
- Add, edit, resolve, archive, and delete replies/messages
- Organize replies into three states:
- Active – Messages still pending a reply
- Resolved – Messages you've replied to and marked as done
- Archived – Soft delete feature to hide messages you no longer want to see
- Clean and focused UI to help you stay on top of conversations
- Light gamification through action history (laying the groundwork for future features)
- Offline-first experience – no account, no server
⚠️ Reminders (and other cool features) aren't here yet — but they're definitely on the radar. Stay tuned!
- Kotlin Multiplatform (KMP) – Shared logic across platforms (Android, iOS, Desktop)
- Jetpack Compose / Compose Multiplatform – UI with modern declarative components
- Room – Local database for structured data
- DataStore – Key-value storage for lightweight preferences and settings
- Koin – Lightweight dependency injection
- MVI Architecture – Unidirectional data flow for maintainable state handling
- Coroutines + Flow + StateFlow – Reactive and asynchronous operations
- GitHub Actions – CI for build, lint and releases
This is still a work-in-progress — a personal playground to explore architecture patterns, Kotlin Multiplatform and UI ideas. It’s not production-ready, but it’s growing feature by feature.
Currently a solo mission, but who knows? Contributions might be welcome in the future.
If this project resonates with you, feel free to star it, follow updates or fork it to build your own version.
This project is licensed under the Apache 2.0 License.