Ankle Monitor Company — GPS Ankle Bracelet Manufacturer

Leading ankle monitor manufacturer serving corrections, pretrial, parole & probation agencies in 30+ countries. One-piece GPS ankle monitors with 7-day battery, fiber optic anti-tamper (zero false positives), and <3 second installation.

Our Story Get Started Today

CO-EYE Hardwares

Next-generation GPS ankle monitors and electronic ankle bracelets. Ultra-high security and reliability powered by 20 years of innovation in electronic monitoring technology.

CO-EYE ONE GPS Ankle Monitor

CO-EYE ONE

The lightest one-piece GPS ankle monitor at 108g. 7-day battery, fiber optic anti-tamper (zero false positives), multi-GNSS positioning under 2m accuracy.

Learn More
CO-EYE i-Bracelet/i-Tracker

CO-EYE i-Bracelet/i-Tracker

Two-piece GPS ankle bracelet and tracking unit for precision location monitoring. RF wristband pairs with portable tracker for continuous offender supervision.

Learn More
CO-EYE HouseStation

CO-EYE HouseStation

Advanced curfew monitoring with integrated cellular and Bluetooth, plus battery backup for continuous operation.

Learn More

bluetooth optical fiber wristband

CO-EYE Wristband

The smallest professional electronic monitoring anti-tamper wristband in the world — only 17g, virtually indistinguishable from a fitness band.

BLE and RF ankle bracelet options with 2-year battery life. Fiber optic tamper detection for GPS ankle monitor pairing with i-Tracker or HouseStation.

Learn More
CO-EYE Wristband CO-EYE Wristband Product Line
CO-EYE Monitoring Software Platform

ENSURING YOUR SYSTEMS SMARTER

Our Software is quick, lean, and market-focused.

A unified web-based platform with 13 modules for GPS ankle monitor management, offender tracking, zone alerts, and compliance reporting. Easily manage your electronic monitoring program at any scale.

Learn More

ONE-STOP MONITORING SOLUTION

Complete GPS Ankle Monitor Product Line for All Risk Levels

From high-risk GPS ankle monitors (CO-EYE ONE) to low-risk smartphone tracking (AMClient), our electronic monitoring product matrix covers every offender supervision need on a single unified platform.

CO-EYE Complete Product Matrix

ankle monitor solutions

Monitoring Solutions

Community Correction

Community Correction

 Bail Monitoring

Bail Monitoring

 Risk-Based Monitoring

Risk-Based Monitoring

 Prison & Jail

Prison & Jail

Why Choose CO-EYE GPS Ankle Monitors?

200,000+ devices deployed across 30+ countries. 7-day battery. Zero false tamper alerts. Under 3-second installation.

Get started today

200,000+

Devices Deployed

30+

Countries Served

20+

Years of Experience

0

False Tamper Alerts

REFINE Technology (CO-EYE) has been a professional ankle monitor company since 2004, providing GPS ankle monitors and electronic monitoring solutions to government agencies, corrections departments, and bail bond companies worldwide.

Ankle Monitor Knowledge Hub

Expert resources to help you understand, evaluate, and deploy electronic ankle monitoring technology.

What Is an Ankle Monitor?

Complete guide to ankle monitors: how they work, types (GPS, RF, alcohol), who wears them, costs, rules, and the technology behind modern electronic monitoring devices.

Read the complete guide →

GPS Ankle Monitor Procurement Guide

Technology comparison, vendor landscape, 10 evaluation criteria, RFP writing guide, cost analysis, and deployment best practices for corrections and pretrial agencies.

Read the procurement guide →

Latest Resources

View all →
Mawei District Bureau of Justice community corrections officers fitting CO-EYE electronic monitoring wristbands on offenders during tiered classification deployment meeting

Mawei District Bureau of Justice Deploys CO-EYE GPS Ankle Monitors and BLE Wristbands for Tiered Community Corrections Management

REFINE Technology is proud to announce the successful deployment of CO-EYE electronic monitoring devices at the Mawei District Bureau of Justice in Fuzhou, Fujian Province, China. The deployment supports Mawei District’s implementation of tiered classification management (分级分类管理) for community corrections subjects — a national policy mandate from China’s Ministry of Justice designed to match supervision […]

Continue reading →
Cut GPS wristband monitoring bracelet confiscated by Madrid Municipal Police - Spain Cometa system domestic violence tracker removed by offender

Spain’s $111M Wristband-to-Ankle Monitor Switch: Why Wrist-Worn EM Devices Fail in Domestic Violence Programs

In January 2026, Spain’s Ministry of Equality made one of the most significant admissions in European electronic monitoring history (EFE, January 2026): their wrist-worn monitoring system for domestic violence offenders had failed. The ministry announced a complete replacement—switching from wristbands to ankle monitors—backed by a new €111 million contract. This decision came after 18 months […]

Continue reading →
Calgary domestic violence victim advocacy — eight years after a sister's death, families demand better GPS monitoring protection for DV survivors

From Tracking Offenders to Protecting Victims: How Real-Time GPS Notification Apps Are Rewriting Domestic Violence Safety

“It’s not being taken seriously until somebody’s life is lost.” Eight years after her sister was killed by an intimate partner in Calgary, a woman’s plea to CBC News cuts through every policy debate about domestic violence prevention. Her grief frames a question that corrections agencies across North America increasingly answer with technology: can GPS […]

Continue reading →