The Eclipse App, developed by Tomlinson Watkins LLC, is a location-focused companion for planning and executing solar eclipse observations. It supplies hyper-local timing and interactive maps tied to your device GPS, plus weather intelligence and hands-free alerts to support on-site decision making. Key functions include millisecond-accurate local eclipse timing, rehearsal simulations, and a community event directory. The tool targets astronomy enthusiasts, eclipse chasers, and travelers who need precise, location-aware planning for viewing rare solar events. It pairs scientific data with practical field guidance.

Delivers location-tied timing and mapped path planning for observers

The app calculates eclipse phases for exact coordinates, offering second-by-second GPS timing and interactive path maps that show the path of totality across regions. Those functions let users pick a viewing site based on where totality occurs and the local timing at that point. The map interface also highlights local circumstances so users can align arrival and setup with the precise minute and second of each phase.

Timing accuracy is supported by scientific partnership and fine resolution

Timing claims are anchored to a formal partnership with The Planetary Society and to millisecond-level precision for specific coordinates, which supports exact local circumstances rather than generic, city-level times. That verification suits observers who need strict temporal accuracy for instrumentation or coordinated observations. The app’s timing model is therefore calibrated to scientific reference data rather than broad approximations.

Core functions operate offline; weather and community features need connectivity

The core timing features and interactive maps are designed to run offline using the device GPS, which supports remote viewing locations where connectivity is limited. Real-time cloud cover forecasts and the community event directory require an internet connection, and cloud data blends historical trends with hourly updates when online. Users should plan data downloads before traveling to remote viewing sites.

Built for observers but requires user attention to logistics and rules

The app targets astronomy enthusiasts, professional chasers, and traveling families and includes rehearsal mode and hands-free audio cues to aid safety and timing on site. It supports Android devices running 8.0 and up, and is also available for iOS, so platform coverage is broad. Users are responsible for ensuring their use complies with applicable platform terms and local regulations when relying on location-based guidance.

A practical field choice for eclipse observers who plan ahead

The app is a practical option for observers and travelers who need dependable operational support during eclipse trips, a claim reinforced by its documented use during the April 2024 total solar eclipse. Users should confirm platform terms and local regulations before relying on any location-based guidance, and perform a rehearsal session on their device prior to travel to ensure readiness in the field.