StackKotlin · Android
PlatformsAndroid
TypeOffline networking utility
RoleDesign · engineering · release
The problem
Network engineers often work in air-gapped or restricted data centres where network access is unavailable — and most subnet calculators phone home, carry ads or track users.
What we built
- Exact subnet math derived from integer bit operations — correct for every prefix length.
- Requests no internet permission, contains no ads and no trackers.
- VLSM planning and a binary bit view with copy-to-clipboard on every value.
- Engineer-first UI with instant results, shipping under the MIT license as an open-source showcase.
Outcome
A genuinely private, offline-by-design tool trusted by engineers — and a public showcase of production-grade native software.