Let me be straight with you before we get into any of this. Events Arena — a live sports prediction platform with Soccer, NHL, and expandable arenas for any type of event Zero users on most of them. I wrote about that honestly on May 9th. ( zero judgement if you go read it ) But here's what I didn't fully explain in that post: The Fear Every Solo Builder Has But Won't Say Out Loud What Gemma 4 Is, In Plain English E2B / E4B — tiny, run on phones and Raspberry Pis ( yes, that little $75 thing ) I have a MacBook Pro M1 with 16GB of unified memory. Not a beast of a machine. The kind of setup a lot of solo builders actually have sitting on their desk next to a cold coffee. ( always a cold coffee ) What I Actually Built — And It's Actually Live Pulled Gemma 4 via Ollama bashollama pull gemma4 9.6GB. I watched the progress bar and thought — this is the whole model. On my laptop. No monthly bill. ( I actually said "wild" out loud to nobody at 2pm on a Saturday, the housecoat was involved ) Added dedicated local endpoints in server.py [email protected]('/api/tripsync-local', methods=['POST']) def tripsync_local(): # exact mirror of /api/tripsync # calls call_ollama() instead of Groq ... @app.route('/api/generate-itinerary-local', methods=['POST']) A ☁️ / 🔒 toggle across the whole app One click switches between Cloud AI and Private AI across both index.html and planner.html. Persists in localStorage. Every fetch routes to the right endpoint automatically. ( one click, that's it, I love when things are actually simple ) The badge When Private AI mode is active, results show "✨ Curated locally by Gemma 4" — so users know exactly what's powering their plan. Not a marketing claim. A real signal from a real local model doing real work. Honest error handling On the live site, Private AI requires a local machine running Ollama. When it's not available, users see exactly why — and a direct link to the GitHub repo with setup instructions. No broken states. No dead ends. ( this one I'm proud of ) Three new routes. A dual-mode toggle. A badge. Clean repo push. I'm a vibe coder — if I can't understand what I'm building, I can't build it. Simple on purpose. Always. ( complexity is not a flex, it's a future problem ) What Actually Happened When I Ran It The API Cost Math The Privacy Thing I Didn't Expect to Care About Wait — Can You Use Gemma 4 on a Live Site Without a Local Machine? genai.configure(api_key="YOUR_GEMINI_API_KEY") Cloud AI → Groq ( fast, reliable, what's live now ) The honest trade-off: the Gemini API means data still leaves the user's machine — so the privacy angle changes. It's Gemma 4, but it's not local. That distinction matters. Don't call it Private AI if it isn't. ( your users will figure it out and trust matters more than marketing ) Match Your Hardware to the Right Model What This Means For YOUR Project What's Next For TripSync Gemma 4 via Gemini API — bring it to live users without requiring local setup The live app: tripsync-ilao.onrender.com One Last Thing William Commu — Just Me Media @nightowl on DEV TripSync: tripsync-ilao.onrender.com