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The Idea: An AI That Lives in My Phone
I am Divyaraj Kush — I have been building apps and doing digital marketing since my school days. One idea kept coming back to me: what if there was an AI that stays special to my phone — one that remembers my conversations and knows me?
The story I designed around was simple. Whatever I type through the keyboard, whichever conversations I have — all of it goes to my AI in the backend, stored through RAG. It keeps information about me, about my talks, about everything. Then whenever I ask the AI — "kal maine kisi se kya baat ki thi?" or "kal mera mood kaisa tha?" — it automatically understands my words, listens, and talks to me the way I talk to others. That was the design: the AI reads what I type, and then speaks with me just like I speak with the world.
How It Works: Keyboard → AI → RAG Memory
The architecture has three layers, all of which I designed and built:
1. System keyboard (Android IME)
A custom IME — Input Method Editor — built native in Kotlin, so it works inside any app: WhatsApp, Chrome, notes, everywhere. Whatever I type is available to the AI pipeline instead of dying inside one chat window.
2. AI backend
Typed text and voice go to an AI backend (AI API + Firestore). The app has full AI chat with visible thinking steps, 24-hour vanishing chats, and pin-to-keep for anything worth saving.
3. RAG memory layer
This is the special part. Conversations are converted into embeddings and stored in a vector store — that's RAG (Retrieval-Augmented Generation). When I ask a question, the backend retrieves the relevant memories and feeds them to the language model alongside the question. So the answer comes from my own history, not just the model's training data. That is how "what was my mood yesterday" gets a real answer.
| Layer | Tech | Job |
|---|---|---|
| Keyboard | Kotlin native IME | Capture + insert text in any app |
| Backend | AI API, Firestore | Chat, reasoning, storage |
| Memory | RAG, embeddings | Remember + recall my life |
What It Can Actually Do
- Grammar Fix + Rephrase anywhere — select text in any app, fix it or rephrase it, insert back with one tap
- Voice commands — tap voice, say "make a list of things I need from the market", and the AI automatically builds my list
- Memory questions — ask what I discussed yesterday or how I have been feeling, answered from RAG memory
- Talks like me — trained on my typing, so replies sound like my own voice, not a generic assistant
- Extras — themes, haptics, auto-correct, token-usage tracking, 24h vanish chats
© Divyaraj Kush
© Divyaraj Kush
© Divyaraj Kush
© Divyaraj KushWhat Market AI Keyboards Miss
Most AI keyboards in the market do one thing: fix your grammar. Useful, but shallow. Nobody combined three things — a system keyboard, voice commands that take action, and a RAG memory that knows your life. Same proof-first approach as my SEO work — I documented how a new website hit Google #1 in 90 days with dated screenshots. That combination was my innovative bet: the keyboard is not a tool, it is the AI's ears. Everything else I have shipped — like the live Play Store app and ranked sites on my apps page — follows the same rule: build what is missing, then prove it works.
Status: Why It's Not on the Play Store
Honest answer: I built this for personal interest, not for launch. It is finished and Play-Store-ready — publishing is a decision, not a blocker, so it sits in pending. I shared the APK privately with friends instead, and their reviews were genuinely great — some of them still use it. If you want to see it working, ask for an APK demo — serious enquiries only. Client work like this (native builds, AI integration, backend) is exactly what I take on: start a project here.
FAQ
What is a RAG-based personal AI app?
A RAG (Retrieval-Augmented Generation) personal AI stores your conversations as embeddings in a vector store. When you ask something, it retrieves the relevant memories and feeds them to the language model — so answers use your own history, not just training data.
Can a custom keyboard send what I type to AI?
Yes. On Android, a custom IME keyboard can process text through an AI backend — grammar fixes, rephrasing, even memory storage — and insert results back into any app.
Is this AI keyboard app on the Play Store?
Not yet. It is a finished personal project shared privately as an APK with friends. A live demo is available on request for serious enquiries.
Need an app like this built?
Native Android, AI integration, backend + memory systems — one developer, end to end.
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