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Privacy Policy

Last updated November 5, 2026

The short version: Tightline keeps everything on your device. We do not collect, see, sell or share your data.

What is stored, and where

• Your catches (species, size, lure, notes, the spot you pin and the weather at the time), catch photos, tackle box, favorite waters, offline maps, saved forecasts and settings are saved in your browser’s storage (IndexedDB, Cache Storage and localStorage) on your device only.
• There is no account and no sign-in. Nothing is uploaded to us.
• Catch photos are shrunk and saved on your device. They never leave it unless you export a backup file yourself.

What we do not do

• No analytics, tracking pixels, advertising or third-party scripts.
• No location history. Your location is never sent to us.
• No AI or machine learning services. The bite score, lure picks and fish key are fixed rules that run in your browser.
• The camera is used only when you choose to add a catch photo.

Location, weather, water and maps

Location is optional. Without it, Tightline uses Colorado Springs. If you allow it:

• Your location is saved on your device.
• To get weather, Tightline sends a spot rounded to about 1 km (2 decimal places) to Open-Meteo, and a box of roughly 40 miles around it to the U.S. Geological Survey for stream gauge readings.
• Maps load image tiles from the USGS National Map, which sees the map area you view. When you save a map for offline use, the area’s outline is also sent to the public OpenStreetMap Overpass server (overpass-api.de) to find boat ramps, piers and fishing spots.
• The exact spot you pin on a catch stays on your device and is never sent anywhere.
• These services receive standard request data such as your IP address. They are not given your name or any other data from Tightline.

Our web host

Tightline’s files are served by Vercel. Like any web server, Vercel may briefly process standard request data (such as IP address and browser type) to deliver the pages and protect against abuse. We do not use those logs to identify you.

Links to other sites

Tightline links to Colorado Parks and Wildlife, USGS, Apple Maps and image sources. Their privacy policies apply when you visit them.

Backups and deleting your data

Settings & backup lets you export your data to a file and erase everything on the device. Clearing your browser’s site data also deletes it.

Children

Tightline is not directed at children under 13, and we do not knowingly collect information from anyone, including children.

Changes

If this policy changes, we will update the date at the top.

Tightline is made by Complete OS LLC. Questions: hello@completeos.app · Terms · Privacy