Turn Every Missed Call Into a Loyal Paying Customer
High-performance Android telephony outreach engine. Native Kotlin call interception, carrier-acknowledged auto-SMS, multilingual Devanagari AI assistant, and official WhatsApp Business Cloud integration.
100%
Carrier ACK Delivery
2 Slots
Dual-SIM Hardware Awareness
3 Languages
English, Hindi & Marathi
SQLite WAL
Zero-Loss Local Persistence
Architectural Excellence
Engineered for Uncompromising Reliability
Unlike fragile background wrappers, RaySynn Promo is built on hardened native Android Kotlin modules, strict carrier callbacks, and a centralized NestJS backplane.
Native Android Telephony Interception
Zero-latency native Kotlin receiver captures incoming and missed calls directly in background SQLite, surviving OS kills and memory trim.
Slot-Aware Dual-SIM Intelligence
Full hardware subscription management. Route promotional SMS through specific SIM slots to optimize corporate carrier rate limits.
Multilingual AI Outreach Assistant
Engineered Devanagari typography and context-aware messaging in English, Hindi (हिंदी), and Marathi (मराठी) across 4 professional tones.
Official Meta WhatsApp Business Cloud API
Centralized server-side gateway dispatching verified business templates without risking third-party client token exposure.
Offline-First SQLite WAL & Auto-Sync
Reliable local database versioning with carrier delivery receipt callbacks. Changes sync automatically when network connectivity restores.
Google Play & Android 14+ Certified
Compliant foreground services, zero illegal FGS permissions, granular runtime permission rationales, and strict user privacy.
Seamless Workflow
How RaySynn Promo Works
From first phone call to closed deal in four automated, compliant steps.
Install & Authorize
Download the official APK. Granular permission sheets guide you through Phone and SMS authorization with zero hidden prompts.
Configure SIM Slot
Native SimManager auto-detects dual SIM subscriptions. Select your dedicated business line or enable intelligent round-robin.
Automated Dispatch
When a call goes unanswered, an instant SMS or official WhatsApp response is dispatched with carrier confirmation tracking.
Analyze & Scale
Offline events sync to your central NestJS admin dashboard. Monitor delivered quotas, carrier ACK rates, and client conversions.
Transparent Pricing
Predictable Plans for Every Stage
No hidden setup fees. Unlimited offline persistence. Scale seamlessly across your team.
Starter Tier
Ideal for independent professionals and single SIM smartphones.
- Automatic Missed Call SMS Dispatch
- Single / Dual SIM Slot Awareness
- Standard Multi-Category Templates
- Offline Native SQLite Call Persistence
- English, Hindi & Marathi Typography
Business Pro
Engineered for growing business teams and high-volume outreach.
- Everything in Starter Tier
- Dual SIM Intelligent Load Balancing
- AI-Powered Multilingual Message Assistant
- Official WhatsApp Dispatch Ready
- High Priority Offline SQLite Sync Engine
- Real-time Carrier Delivery Receipt Tracking
Enterprise SLA
Custom corporate integration with dedicated WhatsApp Cloud API and SLA.
- Everything in Business Pro
- Dedicated Official Meta WhatsApp Cloud Gateway
- Custom Brand Sender IDs
- Enterprise Admin Panel & Audit Trail
- Dedicated Customer Success Manager
- 99.98% Service Level Agreement (SLA)
Ready to Upgrade Your Mobile Business Telephony?
Install the verified production-ready Android package directly. Built with Flutter 3.44 and native Kotlin for maximum battery efficiency.
Got Questions?
Frequently Asked Questions
Get In Touch
Request an Enterprise Demo or Custom Setup
Connect with RaySynn Technology solution engineers for high-volume deployments.