Voice-Activated Inventory Software Development

I need a custom stock-inventory system that I can run for life without any recurring subscription fees. The application must work on both Windows PCs and Android phones and let me manage an unlimited number of items entirely through voice commands... (Budget: ₹1500 - ₹12500 INR, Jobs: Android, Android App Development, API Development, C# Programming, Data Analytics, Mobile App Development, Voice Agents, Windows Mobile)