I Built My Best Friend an Offline Trek Planner With a Local Gemma AI That Can't Make Things Up

Description and use

Trek Organizer consolidates fragmented trek planning into a single offline platform, automatically extracts and verifies information from messages, flags missing and unconfirmed items, and offers a concise day‑overview on the trail.

Problem

My best friend’s trek planning was fragmented across SMS, WhatsApp, notes, and memory, causing chaos and forgotten items.

Outcome

The app consolidates fragmented trek planning into a single offline interface, automatically extracts and verifies information from pasted text, flags missing or unconfirmed items, and provides a concise Today view for on-trail use. Users report increased confidence and trust due to the AI’s strict no-hallucination policy.

Workflow

• 1. User enters trip details, travel legs, stays, trek days, gear, food, and contacts into the app.
• 2. User pastes messy text (e.g., SMS, WhatsApp messages) into Gemma’s “Sort my notes” feature.
• 3. Gemma extracts entities (travel, stays, gear, food, contacts, permits) and presents them as cards with Add/Skip options.
• 4. User confirms or skips each extracted item; unconfirmed items are marked Unknown until verified.
• 5. Gemma performs a plan check against trek conditions and gear list, suggesting missing gear with reasons and prompting critical questions.
• 6. The app calculates missing, packed, and unconfirmed items using code, not AI.
• 7. On the trail, the Today screen displays only the day’s itinerary, accommodation, and emergency contacts.
• 8. All data remains offline; Gemma runs locally via Ollama.
• 9. User can review and edit the plan at any time.
• 10. The app is accessible via a web link and requires Ollama to run Gemma locally.
• 11. User can test the app with deliberately vague text to ensure no hallucinations occur.

Evidence

Gemma does two jobs: 1. Sort my notes. 2. Plan check.

Source

Every extracted value is checked against his own text, in plain code, not AI.

Source

The planner works for everyone straight from the link. The Gemma features need Ollama running on your own computer: install Ollama, run ollama pull gemma3:4b

Source

"Planning a trek has two sides: the physical preparation and the mental one. ... When I first used Trek Organizer, it honestly exceeded my expectations."

Source