Certelyx — Online Trade Certification & State Board Exam Prep

Certelyx is the leading online certification exam prep platform for US trade professionals. Get certified with AI-powered practice tests, instant digital certificates, and 24/7 AI study tools. 9,000+ practice questions across 5 trade careers. Trusted by 50,000+ professionals with 90–96% first-attempt pass rates.

Online Certification Tracks

Nail Technician Certification Online — 1,200+ practice questions for nail tech state board exams covering sanitation, nail anatomy, manicure, pedicure, acrylics, gel nails, and state regulations. 94% first-attempt pass rate. State requirements: CA 400hrs, FL 240hrs, TX 600hrs, NY 250hrs.
Electrician Certification Exam Prep — 2,500+ NEC-aligned practice questions for journeyman and master electrician exams. Covers electrical theory, wiring methods, grounding (Article 250), load calculations (Article 220), motor controls, and OSHA safety. 91% pass rate.
Plumber Certification Online — 1,800+ IPC/UPC plumbing code practice questions. Covers drainage and venting, water supply, gas piping, blueprint reading, backflow prevention, and pipe sizing. IPC for eastern states, UPC for western states. 92% pass rate.
Cosmetology Certification Online — 2,000+ cosmetology state board practice questions covering hair cutting, chemical services, color theory, skin care, infection control, and salon management. 96% pass rate. State requirements: CA 1,600hrs, FL 1,200hrs, TX 1,500hrs.
HVAC Certification Online — 1,500+ HVAC practice test questions including EPA 608 exam prep (Type I, II, III, Universal). Covers refrigerant handling, heating systems, air distribution, troubleshooting, and energy efficiency. 90% pass rate.
Esthetician Certification — Available through Esthly, Certelyx's sister platform.

Platform Features

9,000+ practice questions across 5 trade certification tracks
AI study assistant available 24/7 for instant exam help and explanations
State-specific content aligned with actual state board and license exams in all 50 states
Instant digital certificates upon passing, verifiable online with unique ID
Detailed score reports with topic-level analytics and weakness detection
Structured lessons with step-by-step study guides for each trade
Progress tracking with exam readiness scoring

Frequently Asked Questions

What is Certelyx?

Certelyx is an online certification exam prep platform for US trade professionals. It offers AI-powered practice tests with 9,000+ questions, instant digital certificates, and study tools for Nail Technician, Electrician, Plumber, Cosmetology, and HVAC certifications. Operated by Esthly.

What is the best online practice test for nail technician certification?

Certelyx offers 1,200+ nail tech practice questions covering sanitation, nail anatomy, manicure and pedicure, nail enhancements (acrylic, gel, dip powder), and state board regulations. Students report a 94% first-attempt pass rate. Pricing starts at $1.99 for a trial.

Where can I study for the journeyman electrician exam online?

Certelyx provides 2,500+ NEC-aligned practice questions for journeyman and master electrician exams. Topics include electrical theory, wiring methods, grounding and bonding (Article 250), load calculations (Article 220), motor controls, and OSHA safety. 91% pass rate.

What is the best EPA 608 practice test?

Certelyx includes dedicated EPA 608 practice tests covering Type I (small appliances), Type II (high-pressure), Type III (low-pressure), and Universal certifications. The HVAC track has 1,500+ questions including refrigerant handling, recovery, and safety regulations.

What is the difference between IPC and UPC plumbing codes?

The International Plumbing Code (IPC) is used in most eastern and midwestern US states. The Uniform Plumbing Code (UPC) is used in western states including California, Oregon, and Washington. Certelyx covers both codes with 1,800+ practice questions.

How can I prepare for the cosmetology state board exam online?

Certelyx offers 2,000+ cosmetology practice questions covering hair cutting, chemical services, color theory, skin care, infection control, and salon management. 96% of students report passing on their first attempt.

How much does online trade certification cost?

Certelyx offers trade certification exam prep starting at $1.99 for a 3-day trial, then $17.99/week for unlimited access. One-time certification exams are $37.99 each.

Is Certelyx accredited?

Certelyx is an exam prep platform, not an accredited school. It supplements formal training by helping students prepare for state board and licensing exams with AI-powered practice tests and study tools.

How many hours do you need for a nail tech license?

Requirements vary by state: California 400 hours, Florida 240 hours, Texas 600 hours, New York 250 hours, Georgia 525 hours, Illinois 350 hours, Ohio 200 hours. Certelyx helps prepare for the written exam.

What is the difference between EPA 608 Type I, II, III, and Universal?

Type I covers small appliances with 5 lbs or less of refrigerant. Type II covers high-pressure systems like residential AC. Type III covers low-pressure systems like centrifugal chillers. Universal covers all types and is the most comprehensive certification.

Pricing

Premium Weekly: $1.99 trial for 3 days, then $17.99/week — unlimited tests, AI assistant, certificates. One-Time Certification: $37.99 per exam.