Messaging,
unified & secure.
NexusSMS is a feature-rich SMS/MMS app that fuses your texts with Matrix, Telegram, Discord, Messenger and more — wrapped in end-to-end encryption, on-device spam protection and a deniable vault.
Built for privacy. Built for power.
The messaging features you expect, plus security and automation you won’t find in a stock messaging app.
End-to-end encryption
AES-256-GCM with Signal-style X3DH + Double Ratchet, 30-digit safety numbers and QR key verification.
Unified inbox
Matrix, Telegram, Discord, Messenger, Signal and Slack as filterable tabs — reply to all from one app.
Spam & scam protection
On-device detection across 10 scam categories — OTP phishing, bank impersonation, delivery scams — with auto-blocking.
Automation rules
A Tasker-lite engine with 15 actions: auto-copy OTPs, auto-reply, archive, forward to email, webhooks and more.
Encrypted backups
Google Drive or your own WebDAV/Nextcloud, protected with PBKDF2 passphrase encryption. One-tap restore.
Deniable vault
A hidden encrypted space with a decoy PIN. Hide conversations and unlock them with your own code.
Everyday messaging, done right.
From scheduled texts to smart replies, the basics are anything but basic.
- SMS / MMS + RCS — text, photos, video and rich messaging with automatic SMS fallback.
- Scheduled messages — send once, or repeat daily, weekly or monthly.
- Shortcodes — type
!brband it expands to “Be right back”. - Signatures & templates — per-conversation signatures and a template library.
- Smart reply — context-aware suggestion chips for fast replies.
- GIFs, stickers & emoji — GIF picker, six sticker packs and searchable emoji.
- Reactions — long-press any message to react.
- Full-text search — across every conversation, instantly.
- Dual SIM — choose which SIM each message goes out on.
- Groups & bulk SMS — MMS group chats and bulk modes with send-delay protection.
- App lock — PIN, pattern or password with biometric fallback and auto-lock.
- E2E encrypted chats — per-contact AES-256-GCM with X3DH and Double Ratchet.
- Safety numbers — verify with a 30-digit fingerprint or in-person QR scan.
- Deniable vault — a decoy PIN reveals only an empty shell.
- Screenshot blocking — optional FLAG_SECURE keeps chats out of screenshots.
- Secure storage — keys backed by the Android Keystore. No plaintext secrets.
Your conversations stay yours.
Encryption, a vault and app-level protection keep prying eyes out — including the ones looking over your shoulder.
Under the hood
- Platform
- Android 7.0+ (API 24+)
- UI
- Jetpack Compose · Material Design 3
- Tech stack
- Kotlin · Room · Hilt · Coroutines · WorkManager
- Messaging
- SMS · MMS · RCS
- Encryption
- AES-256-GCM · X3DH + Double Ratchet · Android Keystore
- Integrations
- Matrix · Telegram · Discord · Messenger · Signal · Slack
- Backups
- Google Drive · WebDAV / Nextcloud · JSON / CSV export
- Version
- 1.0.3
Say it your way.
NexusSMS is in final testing and will be available on Google Play for a one-time $4.99 USD.