Snake Rules

Snake Rules — Precise measurements from a single photo

Snake Rules makes it easy to measure the length of snakes, lizards, and other animals using just a photo and a simple reference object. Whether you are a keeper, breeder, or enthusiast, you can obtain accurate measurements in seconds — all directly on your device and without collecting any personal data.

How it works

Take a top-down photo of your animal next to a reference object

(a ruler, tape measure, phone, bank card, etc.).

Mark the start and end of the reference object to set the scale.

Add points along the animal’s body for precise measurement.

Adjust points by dragging them for maximum accuracy.

Save your results and organize them by individual animals.

Everything happens on-device, securely and privately.

Features

• Accurate measurements using only a photo

• Simple and intuitive point-marking system

• Zoom and pan to refine precision

• Real-time length display

• Save and organize multiple animals

• Growth tracking with visual charts

• Export individual animals or all animals in PDF

• Export CSV data for use in other apps

• Import and restore animal data at any time

• Works offline — no accounts, no tracking, no data collection

• Full privacy: your photos and measurements never leave your device

Designed for keepers, breeders, and reptile (or other animals) lovers. Track growth over time, maintain accurate records, and store all measurements in one place. Perfect for snakes, lizards, and any animal whose size can be estimated through a reference object.

Privacy First

Snake Rules does not collect, store, or transmit any personal information.

All calculations and data remain entirely on your device.