Yes, all core features are free. A Pro plan is available for advanced users.

What languages does the voice assistant support?

The AI voice assistant supports 6 languages: French, English, German, Spanish, Italian, and Portuguese.

Yes, your data is encrypted and hosted on secure servers in Europe (Paris). RGPD compliant.

Does TAMSIV work offline?

The voice assistant requires an internet connection. Your existing tasks and memos are accessible offline.

Can I share with my family?

Yes! Create a family group and share tasks, memos, and your calendar. Each member sees updates in real-time.

Is TAMSIV available on iPhone?

TAMSIV is currently available on Android. An iOS version is planned — sign up on our website to be notified upon release.

I built a voice-powered AI task manager in 650 commits

Name: TAMSIV
Author: TAMSIV

6 months ago, I had an idea. At home, there were 4 of us with scraps of paper on the fridge for groceries. At the diving club, everything went through WhatsApp — impossible to find anything.

Today, TAMSIV is a complete Android app with an AI voice assistant, collaborative groups, a calendar, gamification, and it speaks 6 languages. 650+ commits. Solo dev.

The voice pipeline

The core of TAMSIV is voice. You press, you speak, the AI understands and creates the task. Under the hood:

Deepgram for Speech-to-Text (streaming with VAD)
OpenRouter for the LLM (400+ models, automatic fallback)
OpenAI TTS for text-to-speech ("nova" voice)

All connected via WebSocket with JWT authentication. PCM 16kHz mono audio goes from the phone, through the backend, and returns as a structured voice response.

The stack

Frontend: React Native 0.81 (TypeScript), New Architecture (Fabric)
Backend: Node.js/Express + WebSocket
Database: Supabase PostgreSQL with 3 schemas
Website: Next.js 16, Tailwind CSS 4, Vercel

Features that took the most time

Collaboration was the biggest undertaking. 6-level hierarchical groups, roles, checklists with validation, read tracking, assignment. 31 RLS policies.

The calendar with recurrence was surprisingly complex. LLMs are not good with dates — we had to build a mapping table.

Gamification: 12 levels, 10 badges, streaks up to 365 days, daily challenges, leaderboard. A dedicated schema with 5 tables and automatic triggers.

The mistakes

I spent 6 months doing no marketing. 650 commits and not a single post talking about it. Don't do that.

I also underestimated i18n. Going from 100% French to 6 languages affected 35 files and 1993 translation keys.

What's next

TAMSIV is in alpha on the Play Store. 12 testers. The next goal: public production. If you're a solo dev and you're hesitating — go for it. The first commit is the hardest.