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Terms of Use

Last updated November 5, 2026

Tightline is a free fishing companion from Complete OS LLC ("we"). By using it you agree to these terms.

What Tightline is

A personal tool that gathers weather, water readings, maps and Colorado Parks and Wildlife water facts in one place, adds our own bite score, lure picks, tips, knots and fish key, and keeps a catch log on your device.

It is a guide, not a guarantee

• The bite score, lure picks and tips are rules of thumb. Fish do not read forecasts.
• Weather, water and map data come from third parties and can be late, wrong or missing. Saved copies shown offline can be out of date.
• The fish key can be wrong. If you are not sure what you caught, release it.

Rules, licenses and safety are on you

• You are responsible for carrying a valid Colorado fishing license and following Colorado Parks and Wildlife rules, including bag and size limits and special rules for each water. The official CPW brochure always wins over anything in this app.
• Water, ice and weather are dangerous. Never rely on Tightline for ice thickness, lightning, flows or boating safety. Wear a life jacket, check the ice yourself, and get off the water when storms come.
• Respect private property and posted closures. A water or access point shown on a map does not mean you may enter.

Your data

Your data stays on your device (see the Privacy Policy). You are responsible for backing it up. We cannot recover data that is deleted or lost with your device or browser.

Third-party data

Weather data by Open-Meteo.com (CC BY 4.0). Water readings and base maps from the U.S. Geological Survey (public domain). Ramps and piers © OpenStreetMap contributors (ODbL). Water facts from the CPW Fishing Atlas. Fish illustrations are public domain and credited on the Credits page.

No warranty

Tightline is provided "as is", without warranties of any kind. To the fullest extent the law allows, Complete OS LLC is not liable for any loss, injury or damage arising from using it.

Changes

We may update Tightline and these terms. If the terms change, we will update the date at the top.

Law

These terms are governed by the laws of the State of Wyoming, USA.

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