Drift

Drift notices when you've stopped texting people you used to be close with, and nudges you to reach back out — with real things to talk about.

How it works

1. Mac script reads your iMessage history from ~/Library/Messages/chat.db
2. Filters candidates: must have 50+ messages exchanged, silent for 30–1500 days, saved in your contacts
3. Gemini reads the last 100 messages per candidate and decides if the relationship is worth rekindling
4. Gemini generates 3 talking points per contact (one current/news-based, one inferred from the conversation, one shared experience idea) + a ready-to-send message for each, written in your own tone
5. Firestore syncs the results to your iPhone in real time
6. iOS app shows nudge cards with talking points, lets you keep or dismiss them, and sends push notifications

Stack

• Backend: Python 3, Google Gemini 2.5 Flash (with Search grounding), Firebase Firestore
• Frontend: SwiftUI, Firebase iOS SDK

Setup

Backend

cd backend/
python3 -m venv venv && source venv/bin/activate
pip install google-genai firebase-admin python-dotenv

Create backend/.env:

GEMINI_API_KEY=your_key_here

Add backend/serviceAccountKey.json (Firebase service account from the Firebase console).

Grant Terminal Full Disk Access in System Settings → Privacy & Security (required to read chat.db).

Run:

python3 main.py

iOS

Open frontend/ in Xcode, add your GoogleService-Info.plist, and run on a device or simulator.

Screenshots

Home — ranked nudge cards with AI-generated subtitles	Notification — live banner with a talking point	Notifications sheet — recent and snoozed nudges	Detail — talking points and quick actions	iMessage — conversation starter pre-filled and ready to send

Requirements

• macOS with iMessage history
• Python 3.10+
• Xcode 15+
• A Firebase project with Firestore enabled
• Gemini API key