Effective date: November 11, 2026
Developer: Digital NEXUS (digitalnexus.studio)
Package: com.confinedsafe.nexus
ConfinedSafe stores everything you enter only on your phone. Digital NEXUS does not collect, receive, sell, or share any of your data. The app has no account, no ads, no analytics, and no in-app purchases.
The app keeps your local atmospheric test entries (O2, LEL, H2S, CO), ventilation purge calculations, isolation readiness checks, and local worksheet snapshots (including client-side SHA-256 checksums) strictly in your device's private local storage.
The app requests zero runtime device permissions (no camera, microphone, location, contacts, or file-system access). The Android manifest declares zero network (INTERNET / ACCESS_NETWORK_STATE) permissions and the app makes zero outbound network requests.
ConfinedSafe operates 100% offline. All assets, threshold tables, and SHA-256 snapshot digest functions run locally on your device without external font CDNs or cloud APIs.
ConfinedSafe is completely free and contains no Google Play Billing library, subscriptions, or paid tiers.
When you tap Print Worksheet or Share Text Summary, your worksheet is delivered only to the Android print service or messaging app you choose.
You can clear or overwrite entries inside the app, clear app storage in Android settings, or uninstall ConfinedSafe to permanently remove all locally saved worksheets.
ConfinedSafe is an independent worksheet calculator by Digital NEXUS. It is not affiliated with, endorsed by, or a substitute for OSHA 29 CFR 1910.146 / 1926.1200, NIOSH, ACGIH, calibrated 4-gas monitors, or Entry Supervisor authorization.
Digital NEXUS, [email protected], digitalnexus.studio