Caudal by Phalanx Fishing
Fish measurement and catch documentation tools for anglers.
Caudal is designed to make catch documentation easier, cleaner, and more consistent — right from your phone, right at the water.
Caudal is developed by Phalanx Fishing LLC.
Estimated length
18.4 in
Species
Largemouth
What is Caudal?
A cleaner way to log the day on the water.
Caudal is a mobile app from Phalanx Fishing LLC for fish measurement and catch documentation. Snap a photo of your fish, and the app helps you keep a consistent, organized record of every catch — species, conditions, and the moment itself.
Phalanx Fishing builds tools for anglers. Caudal is our fish measurement app, designed for people who want a fast, dependable way to document their time on the water without slowing it down.
How it works
Three steps from catch to record.
The flow is simple on purpose — designed to keep you fishing, not fiddling with your phone.
- 1
Snap a photo
Capture your catch with your phone's camera, the way you already would.
- 2
Let Caudal measure
Caudal uses measurement tools to estimate fish length from your image.
- 3
Save the record
Keep a clean, consistent log of every catch — species, time, and the photo itself.
In-app measurement
Your camera does the heavy lifting.
Caudal uses measurement tools to help you estimate fish length from a single image. It is designed to make catch documentation faster and more consistent, so you spend less time fumbling with a tape and more time fishing.
- Designed for use in real conditions — boats, banks, kayaks.
- Pairs measurements with the original photo for a complete record.
- Streamlined capture flow that keeps you focused on the catch.
Estimated length
18.4 in
Species
Largemouth
Privacy-conscious design
Built with your data in mind.
Only what's needed
Caudal is designed to use the data required to deliver measurement and documentation features — and not collect more than that.
Clear about third parties
When third-party services are used for image processing, AI analysis, hosting, or analytics, we tell you about it in our privacy policy.
You stay in control
You can contact us any time for deletion or privacy requests. We don't sell personal information.
Coming soon
Caudal is launching soon on iOS.
We’re putting the finishing touches on the app. Drop us a line and we’ll let you know the moment it’s available.
Contact & support
Questions about Caudal? We’re here.
Reach out for app questions, bug reports, privacy requests, or anything about your account or data. Caudal is operated by Phalanx Fishing LLC, and we read every email.