Fly Identification ✦ Hatch Matching ✦ Rig & Color Guidance ✦ AI Confidence Scoring ✦ Field-Tested Intelligence ✦ Now in Beta ✦ Available on the App Store ✦ Fly Identification ✦ Hatch Matching ✦ Rig & Color Guidance ✦ AI Confidence Scoring ✦ Field-Tested Intelligence ✦ Now in Beta ✦ Available on the App Store ✦
Live Beta — TestFlight Now on the App Store

Your Pocket
Field Guide
to Match the Hatch.

Point your camera at any fly or insect on the water. HatchMatch identifies it, tells you how confident it is, and gives you a rig — in seconds.

Join Beta Test Download on the App Store Read the rEADME →

Start with 10 free complimentary tokens and give it a try. Token packs from $2.99, or go unlimited with Guide Pack.

500+
Field IDs Logged
10·
Complimentary Tokens
★
Built by an Angler
iOS 17+
iPhone
Confidence
87%
Hatch Active
Zebra Midge #14
HatchMatch identification — Hatch Identified, High Confidence, Midge Adult, Zebra Midge #14-18 Best Match
Two ways to use it

Match the Hatch

Snap a real insect on the river. Get the ID and the patterns that match it.

HatchMatch capture screen — snap a macro photo of an insect on the river
HatchMatch identification — Hatch Identified, Midge, with recommended patterns

Identify a Fly

Snap a tied fly to identify the pattern, size, and best presentation.

HatchMatch capture screen — snap a photo of a tied fly
HatchMatch fly identification result — pattern, size, and presentation
Core Capabilities

Every tool
the hatch
demands.

HatchMatch isn't just identification — it's a full decision-support system. The app tells you not just what the fly is, but what to do about it, and — critically — how sure it is. Built for rivers, not labs.

01
Hatch Matching
Cross-references the identified insect against known hatch patterns and conditions so you know exactly what's happening on the water.
02
Fly ID
Point and shoot. The AI vision model classifies the insect from your photo — species, stage, and size — in seconds.
03
Confidence Score
The app tells you when it's sure and when it isn't. Uncertainty is a first-class feature — not a bug hidden behind false precision.
04
Rig & Color
Get specific fly recommendations — pattern, hook size, tippet weight, and presentation angle — not just a species name.
Workflow

From river
to rig
in seconds.

Most field guides tell you what a fly looks like in perfect conditions. HatchMatch works in the field — smudged screen, bright sun, fast water. The whole flow is under ten seconds.

Try It Free Download on the App Store
01
Capture
Photograph the Fly
Open the app. Point at the insect — on the water, in your hand, on a rock. One tap to capture. No special lighting needed. The model handles visual ambiguity.
02
Identify
AI Classifies the Insect
OpenAI Vision analyzes the photo. The model reasons about species, life stage, and size — then returns a classification with a calibrated confidence score. It shows its work.
03
Match
Hatch Matching & Rig Guidance
Based on the identification, the app surfaces matching hatch patterns, fly recommendations by stage, hook size, color, and presentation. Everything you need to rig right — now.
04
Fish
Get Back on the Water
No scrolling. No squinting at a chart. HatchMatch keeps you fishing. The whole interaction is designed to disappear — you get your answer and you go.
Under the Hood

Designed for
AI uncertainty.
Not despite it.

Visual ambiguity is the central design problem here. Insects look similar. Lighting is bad. Photos are blurry. A rules-based system breaks. An agent reasons — and tells you when it's unsure. That's a feature, not a failure.

Read the agentic workflow breakdown →
→
Visual ambiguity requires reasoning, not rules
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Identification requires judgment, not just pattern matching
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Users need to understand why a result was suggested
→
The model makes calls. The app adds guardrails and context
→
Prompts were tuned based on real failure cases in the field
HatchMatch
Join Beta
Get the App

Know what's
hatching.
Instantly.

HatchMatch is in active beta on iOS. Download via TestFlight, fish it hard, and send your feedback. This is a live product being refined in the field — your river included.

HatchMatch is available now on the App Store. Snap, identify, and match the hatch on your river. Start with 10 free identifications — no account hassle.

Join on TestFlight Download on the App Store
iOS only · Free · Active development
iPhone · iOS 17+ · Free to start