Comparison

Ugly's Electrical References vs ATEI

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Ugly's Electrical References

This app provides electricians and electrical professionals with up-to-date digital information based on the National Electrical Code. It includes formulas, wiring diagrams, conduit bending guides, and calculators for various electrical calculations. The app is designed for on-the-job reference and works offline.

Highlights
  • NEC 2026 updates
  • Mathematical formulas and calculators
  • Conduit bending guide with videos
  • Ampacity and conduit fill information
  • Wiring diagrams
  • Conversion tables
  • Works offline
Features
Read full description

The Ugly's Electrical References App has been updated to reflect changes to the 2026 National Electrical Code (NEC) and the 2026 Edition of our popular Ugly’s Electrical References book. The Ugly’s App offers the most pertinent, up-to-date digital information for electricians, including table change information, mathematical formulas; National Electrical Manufacturers Association (NEMA) wiring configurations; a conduit bending guide with videos, ampacity and conduit fill information, transformer and control circuit wiring diagrams, and conversion tables. The 2026 Edition: * Reflects changes to the 2026 NEC * Features expanded coverage of the following topics: * Full-load currents for 3-phase transformers  * Maximum number of conductors in electrical metallic tubing for trade sizes 5 and 6  * Equipment grounding conductors  * General lighting loads for non-dwelling occupancies  * Overview of important NEC code changes from 2020, 2023 and 2026  Electricians and electrical professionals have used ‘Ugly’s Electrical References’ book as their on-the-job reference for over 35 years. This app will serve you even better in the field today.  FEATURING Calculators and Interactive Features • Ohm’s Law Calculator • Voltage Drop Calculator • Ampacity Calculator • To Find: Amps, Watts, Horsepower, KVA • To Find: Inductance, Impedance, Reactance • Three-phase AC Motor Data: Starter, Breaker, Heater, Wire, and Conduit Size • Power Factor Correction • Full Load Current for Motors and Transformers • Locked-Rotor Current Calculator • Offset Bending Calculator • Conduit Fill Calculator • Conversions for Area, Length, Temperature, Time, Volume, and Weight • NEMA Wiring Configurations *Pinch & Zoom for improved readability *Conduit Bending Video Tutorials *Search function helps you quickly find what you need to know *NEC Updater outlines and explains changes to the National Electrical Code© *Electrical Safety including definitions, boundaries, procedures, PPE guidance, and life-saving *First aid procedures *Blueprint symbol identifier *Bookmark your commonly used screens *High-definition images and interactive tables that can be zoomed in for detail *Works offline *Great for electricians, students, engineers, contractors, maintenance workers, and military Interested in a buying more than one copy of the Ugly’s Electrical Reference app for your commercially owned devices? Please email info[at]uglys[dot]net for details on volume purchases. Privacy Policy - http://www.jblearning.com/privacy/ Terms of Service - http://www.jblearning.com/use/ Support – http://www.uglys.net/appsupport The Ugly’s Electrical Reference app is part of the popular Ugly’s Professional Reference® series, which is an imprint of Jones & Bartlett Learning. National Electrical Code and NFPA 70 are registered trademarks of the National Fire Protection Agency and are not associated with Ugly’s Electrical References in any way.

About

ATEI

Features
Read full description

Welcome to the ATEI98 mobile application. Tailored for aspiring members and professionals alike, ATEI98 provides essential resources and tools to advance your career, enhance safety skills, and stay connected. Key Features: Safety Requirements Information Stay informed on the latest safety standards, protocols, and requirements to ensure a safe work environment. Access updated guidelines and resources anytime, anywhere. Membership Application Join our community of skilled professionals! Apply to become a member and start your journey with ATEI98. Apprenticeship Model & Documentation Learn about our comprehensive apprenticeship model, designed to guide you step-by-step. Training Videos Get access to a library of training videos tailored to your trade. Boost your skills and knowledge with resources designed for the industry. Asynchronous eLearning Remain a lifelong learner with our asynchronous eLearning modules. Complete courses at your own pace. Download ATEI98 today and take the next step in your professional journey!

Screenshots

Ugly's Electrical References4 screens
ATEI4 screens

Verdict

The call

The clearest difference is price: ATEI at Free against Ugly's Electrical References's $12.99. ATEI also leads on iOS requirement (15.5 vs 17). Ugly's Electrical References's advantage is chart position (#18 vs unranked) and update cadence (every 3 months vs every 6 months). On ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

ATEI is free to download; Ugly's Electrical References costs $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Ugly's Electrical References ships an update every 3 months, ATEI every 6 months. The most recent releases landed on November 1, 2026 and September 30, 2026 respectively.

Scorecard4 real differences · 7 level
Ugly's Electrical References versus ATEI: the parameters behind the verdict, then further details
ParameterUgly's Electrical ReferencesATEI
Price$12.99Free — better
Rating4.4 (1.5K ratings) — better—
Positive reviews47.1% of reviews—
Number of ratings1.5K — better—
Update frequencyEvery 3 months — betterEvery 6 months
AdsNoNo
In-app purchasesNoNo
MonetizationPaid—
Best chart rank#18 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS1715.5 — better
Further details — not scored
Size63 MB71 MB
Age rating9+4+
DeveloperInformed PublishingMosaic Learning, Inc.

Bugs and requests

Ugly's Electrical References

Reported bugs

4 issues
  • Videos not playing
  • Bookmarks not working correctly
  • Navigation issues causing app crashes
  • Incorrect calculation results

Requested features

5 requests
  • Zoom functionality
  • Better search capabilities
  • Spanish language support
  • Offline access to full content
  • Improved bookmarking system

ATEI

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Ugly's Electrical References

No in-app purchases

None

ATEI

No in-app purchases

Questions

Is Ugly's Electrical References free?
Ugly's Electrical References costs $12.99, with no in-app purchases.
Is ATEI free?
ATEI is free to download, with no in-app purchases.
Do Ugly's Electrical References or ATEI have ads?
Neither Ugly's Electrical References nor ATEI shows ads.
Which is updated more often, Ugly's Electrical References or ATEI?
Ugly's Electrical References ships an update every 3 months, and ATEI every 6 months. Most recently, Ugly's Electrical References was updated on November 1, 2026 and ATEI on September 30, 2026.

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