LiDAR Fish Measurement: How Technology is Changing Fishing
Learn how LiDAR technology on modern smartphones is revolutionizing the way anglers measure and record their catches.
For decades, anglers have relied on tape measures and bump boards to measure their catches. But smartphone LiDAR technology is changing the game, offering instant and accurate measurements right from your phone.
What is LiDAR?
LiDAR stands for Light Detection and Ranging. It works by emitting laser pulses and measuring how long they take to bounce back from objects. This creates a precise 3D map of whatever the sensor is pointed at.
Apple introduced LiDAR sensors in the iPhone 12 Pro and later Pro models, as well as recent iPad Pro tablets. These sensors were originally designed for augmented reality, but creative developers have found powerful new uses — including measuring fish.
How LiDAR Fish Measurement Works
When you open a LiDAR-enabled fishing app like CatchVault and point your iPhone at a fish, the LiDAR sensor scans the fish and calculates its length in real time. The process takes less than a second and requires no physical contact with the fish.
The benefits are significant: - No fumbling with a tape measure while holding a fish - Faster measurements mean less time with the fish out of water - Consistent accuracy regardless of the measuring angle - Measurement is automatically saved with the catch log
Accuracy and Limitations
LiDAR measurements on modern iPhones are accurate to less than an inch on fish. For tournament-level precision, CV verified computer vision can be utilized but for personal records and casual fishing, LiDAR is more than sufficient.
Better for the Fish
One of the biggest advantages of LiDAR measurement is the reduced handling time. The faster you can measure and photograph a fish, the sooner you can release it. This is especially important for catch-and-release fishing, where minimizing stress on the fish improves survival rates.
The Future of Fishing Technology
LiDAR is just the beginning. Combined with AI species identification, optional GPS logging, and weather data, CatchVault is creating a comprehensive digital fishing journal that was impossible just a few years ago. Every catch becomes a data point that helps you understand fish behavior and improve your skills.
Frequently Asked Questions
How accurate is LiDAR fish measurement on iPhone?
LiDAR measurements on modern iPhones are accurate to less than half an inch for fish. For personal records and casual fishing this is more than sufficient, though tournament-level precision still requires a physical measurement.
Which iPhones have LiDAR for measuring fish?
Apple introduced LiDAR sensors starting with the iPhone 12 Pro and all subsequent Pro models, as well as recent iPad Pro tablets. Standard non-Pro iPhone models do not include a LiDAR sensor. You need a Pro model to use LiDAR-based fish measurement apps like CatchVault.
Is LiDAR better than a tape measure for fish?
LiDAR is faster and reduces fish handling time, which is better for catch-and-release survival rates. You can measure a fish in seconds without fumbling with a tape measure while holding the fish, and the measurement is automatically saved with your catch log. For tournament weigh-ins a physical measurement is still the standard, but for personal records LiDAR is more than accurate enough.
How do you use LiDAR to measure a fish?
Open a LiDAR-enabled fishing app like CatchVault and point your iPhone at the fish from 12 to 18 inches away. The LiDAR sensor scans the fish and calculates its length in real time, taking just a few seconds with no physical contact required. For best results, place the fish on a flat, contrasting surface in good lighting and keep the phone steady during the scan.
Does LiDAR work in low light for measuring fish?
LiDAR works in low light conditions better than camera-based measurement because it uses laser pulses rather than visible light. This also allows anglers that fish at night and want to measure a fish discretely without a flash or headlight revealing their spot to other anglers.
Ready to Fish Smarter?
Download CatchVault free on iOS — log catches, identify species with AI, and measure fish with LiDAR.