Gnatcast

Gnatcast

The biting gnat index

6 ratings
2 reviews
Free

Details

  • Released
  • Updated
  • April 16, 2026
  • June 30, 2026

Features

Gnatcast screenshot #1 for iPhone
Gnatcast screenshot #2 for iPhone
Gnatcast screenshot #3 for iPhone
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About

This app provides a hyper-local forecast specifically for biting midges, combining weather data, tide predictions, and community reports to predict swarm activity. It helps users plan outdoor activities by indicating when and where biting gnats are likely to be most active.

Live Biting Gnat Index (0-100)
72-hour hourly swarm timeline
10-day daily forecast
NOAA tide integration
Live BiteRep heatmap
Community bite reports
Micro-climate adjustments
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What's New in Gnatcast

1.0.9

June 30, 2026

Historical Averages fixed to prevent any 'self' data from being sent from the phone for a location other than where the user is.

User reviews

Best app I haven’t used yet.

Happy birthday, Seth 🎉

To celebrate, I downloaded Gnatcast—the only app that somehow captures both the buzzing of gnats and Seth’s unmistakable “I-forgot-deodorant-at-Burning-Man” aura.

Honestly, the app works surprisingly well. It’s lightweight, quirky, and just slightly chaotic—kind of like its creator wandering barefoot through a farmer’s market explaining fermentation to strangers. The interface is clean, though I assume that’s because Seth spent all the design time meditating instead of adding extra buttons.

Performance-wise? Solid. It didn’t crash once, which is more than I can say for Seth after two kombuchas in the sun.

All jokes aside, Gnatcast is weird in a good way—like a hippy who refuses to wear deodorant but somehow still gets invited to every party.

Happy birthday, Seth. Please accept this review as both praise and a gentle nudge toward personal hygiene.
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Gnatcast Really Works!

We are hikers, canoers, and fishermen in North Carolina. Thank goodness somebody developed this app to give us the opportunity to decrease gnat/no-see-um exposure and more thoroughly enjoy our outdoor activities!😀

FAQ

What is the Gnatcast Biting Gnat Index?

The Gnatcast Biting Gnat Index is a score from 0-100 that indicates the predicted intensity of biting midge (no-see-um) swarms in a specific location. It uses a color-coded system to represent the risk level, helping users understand when it's safest to be outdoors.

How accurate is Gnatcast?

Gnatcast combines real-time WeatherKit data, NOAA tide predictions, and live community reports to provide an accurate forecast. The app is built on real science and real user reports, aiming to give users a reliable prediction of gnat activity.

Does Gnatcast have ads?

No, Gnatcast does not contain advertisements. It is a completely free application for users.

What devices does Gnatcast support?

Gnatcast is available for iPhone and iPad devices. It is designed to be accessible on Apple's mobile platforms.

How often is Gnatcast updated?

The latest version of Gnatcast is 1.0.9, and it was last updated on June 30, 2026. This indicates a commitment to regular updates and improvements.

What is the age rating for Gnatcast?

Gnatcast has an age rating of 4+, making it suitable for users of all ages. This suggests the content within the app is appropriate for a wide audience.

Can I submit my own reports to Gnatcast?

Yes, users can submit their own 'BiteReps' to help improve the community heatmap and forecast accuracy. This crowdsourced data is a key component of Gnatcast's predictive model.

What areas does Gnatcast focus on?

Gnatcast is specifically built for coastal living in the Southeast and Gulf Coast regions of the United States, including areas from Beaufort to Charleston, Savannah, Hilton Head, and Tampa.