About SMS Mobile App
SMS Mobile App is an Android-first SMS operations platform built and maintained by Ahsan Mahmood (aoneahsan@gmail.com). The product is intentionally send-only — it cannot read, receive, or act as default handler for SMS, and there is no iOS-native send path. Architecture: a React 19 + Vite web UI for job management, a Capacitor 8 Android app for native SMS dispatch, and Supabase (Postgres + Auth with Google sign-in) for storage, scheduling, and row-level security. Sending happens locally on the user's device via Android's SmsManager (silent flow) or a UI-prompted intent (visible flow); the SIM card is the user's. There is no Twilio or other cloud SMS gateway, no per-message fee, no shortcode infrastructure, and no third-party message routing. Batch sending runs only across your own registered devices and is opt-in per device (off by default) — the owner turns each device on in Settings and can turn it off instantly, and each device has a hard local quota and a per-device rate limit.