Best Onus Customer Apps

250+ iOS apps curated and reviewed

4.5 avg rating

20 free apps

Updated September 2026

ONUS Customer is the household name in onus customer, but it's far from the only option. We track 250+ alternatives and competitors on iOS — many free, many higher-rated than you'd expect.

Compare top Onus Customer Apps (September 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	ONUS Customer	Free	—	No	No	May 2026
2	Onus Programming	Free	5.0★ (4)	No	No	May 2026
3	HVACR Learning Network by ESCO	Free	—	No	Yes	Aug 2026
4	Baker HVAC Pro+	Free	4.9★ (587)	No	No	Sep 2026
5	AC Service Tech LLC	Free	5.0★ (1)	No	No	Sep 2026
6	TruTech Tools	Free	4.9★ (52)	No	No	Sep 2026
7	HVAC Mastery	Free	5.0★ (1)	No	No	Jun 2026
8	HVACsim	Free	2.6★ (10)	No	Yes	Jul 2026

Top Picks for Onus Customer

#1

ONUS Customer by 2313760 Alberta inc.

Editor's Choice

🛍️ Shopping

0.0(0 ratings)

Free

ONUS Customer screenshot 1

ONUS Customer screenshot 2

ONUS Customer screenshot 3

#2

Onus Programming by Titan Engineering Inc

Strong Contender

💪 Health & Fitness

5.0(4 ratings)

Free

Onus Programming screenshot 1

Onus Programming screenshot 2

Onus Programming screenshot 3

This app is a comprehensive workout tracker designed for serious lifters. Log every detail of your training, build a personalized exercise library, and track your progress through distinct training phases. Visualize your gains and share your journey with a supportive community.

#3

HVACR Learning Network by ESCO by Esco Institute Ltd

Enhance Your HVACR Knowledge

Worth Considering

📚 Education

0.0(0 ratings)

FreeIn-App Purchases

HVACR Learning Network by ESCO screenshot 1

HVACR Learning Network by ESCO screenshot 2

HVACR Learning Network by ESCO screenshot 3

HVACR Learning Network by ESCO screenshot 4

Access HVACR courses, communities, and resources on the go. Stay updated with industry trends and engage with peers. Ideal for professionals and students preparing for certifications and sharpening technical skills.

More Onus Customer apps to explore

Baker HVAC Pro+

Baker HVAC Pro+

Baker HVAC Pro+

This app provides HVAC/R professionals with on-the-go access to product information and essential tools. It features real-time order tracking, a duct calculator, warranty verification, and branch location details. Users can also search for parts, view technical documents, and receive special offer notifications.

Real-time order statusDuct calculatorProduct availability and pricing

📊 Productivity

AC Service Tech LLC

AC Service Tech LLC

AC Service Tech LLC

by AC Service Tech, LLC

This app provides a comprehensive platform for HVAC/R technicians and students to access educational resources. It features training videos, calculators, online courses with certificates, articles, and podcast episodes, all in one convenient location.

Access online courses with certificatesWatch over 750 training videosUtilize HVAC/R calculation tools

Top HVAC Brands, Shipped Fast

Order HVAC tools from trusted brands with same-day shipping and expert support. Earn rewards and unlock exclusive deals available only within the application. Access a wide selection of diagnostic tools, recovery equipment, and accessories for HVAC/R professionals.

Order HVAC toolsTrusted brandsSame-day shipping

🛍️ Shopping

Learn the HVAC Trade

This app provides hands-on learning for HVAC professionals, covering fundamentals, core and advanced systems, and EPA 608 certification prep. It features interactive diagrams, simulators, real-world challenges, and quick reference tools for on-the-job use.

Structured learning tracksInteractive electrical and wiring simulatorsRefrigerant cycle simulator with fault injection

This app offers interactive learning and real-world data analysis to help HVAC professionals diagnose and troubleshoot systems. It provides personalized training plans, skill assessments, and team management tools for contractors.

Technical Knowledge EvaluatorIndividualized Learning PlansReal-World Data Analysis

free with in-app purchases

Connect . Install . Service

This app simplifies HVAC system installation, service, and troubleshooting for contractors. It offers Bluetooth connectivity for setup, diagnostics, and access to technical support resources like manuals and parts lists.

Bluetooth setup for HVAC systemsSystem monitoring and status checksAlarm diagnosis and history

Connect . Install . Service

This app streamlines HVAC installation, service, and support for contractors. It offers Bluetooth connectivity for system setup and troubleshooting, along with access to product information, warranty tracking, and dealer locators.

Bluetooth setup and troubleshootingSystem operating parameter monitoringAlarm diagnosis and history

Access a vast database of HVAC models, manuals, and part lists to speed up your work. Utilize an AI-powered troubleshooting tool or connect with experienced technicians for real-time support.

500,000+ HVAC unit databaseManuals and part listsAI troubleshooting tool (MasterMechanic)

by HVAC Hero LLC

This app provides HVAC professionals with AI-powered instant answers, a comprehensive resource library, and NFC tag scanning for quick access to manuals and warranty information. It aims to enhance efficiency and accuracy in field service.

AI Chatbot for technical questionsComprehensive HVAC resource libraryNFC tag scanning for unit information

This app provides HVAC technicians with instant access to product information, including warranty status, inventory, and technical specifications. It offers real-time support, order tracking, and helpful calculators to streamline job management and business growth.

Real-time product availability & pricingOrder status and notificationsVideo/Text technical support

📊 Productivity

free with in-app purchases

Diagnose Turbocor® Compressors

This app assists service technicians in diagnosing and troubleshooting Danfoss Turbocor® compressors in the field. It helps identify symptoms, explore potential causes, and provides recommended next steps, along with quick reference charts and service literature.

Compressor component diagnosisSymptom identification and cause analysisRecommended troubleshooting steps

General Aircon Customer App

General Aircon Customer App

General Aircon Customer App

Easily log service complaints for your General Air Conditioner products and track their progress. One-time registration saves your contact details, preferred service times, and product information for a streamlined experience.

Log service complaintsMonitor complaint statusOne-time registration

by OUBER AIR COOLER & VENTILATION CO.,LTD.

Control your OUBER air cooler remotely from anywhere via the app. Manage multiple devices simultaneously, receive real-time status updates, and easily share device access with others. Connect quickly using Wifi and Bluetooth.

Remote air cooler controlSimultaneous multi-device managementReal-time state feedback

Gemaire HVAC Pro+

Gemaire HVAC Pro+

Gemaire HVAC Pro+

This app provides HVAC professionals with essential tools and product information to streamline their work. Access pricing, order status, real-time availability, and technical support. It also includes inventory management, warranty services, and helpful calculators.

View pricing and order statusReal-time product availabilitySearch for HVAC models and parts

📊 Productivity

free with in-app purchases

by Barrett Heating And Cooling LLC

This application provides clients of a heating and cooling company with access to product information and service scheduling. It serves as a convenient portal for managing HVAC needs.

Access product informationSchedule servicesClient portal

Plumbing & HVAC Supplies

Access a vast selection of plumbing, heating, and HVAC supplies with real-time customer support. Quickly find products using barcode scanning, reorder frequently purchased items, and access helpful resources like install guides and spec sheets. Enjoy fast shipping to most of the US.

Extensive product selectionReal-time customer supportBarcode scanning for product search

🛍️ Shopping

East Coast Metal Distributors

East Coast Metal Distributors

East Coast Metal Distributors

HVAC Pro+ Technicians Tools

This app provides HVAC professionals with tools to manage inventory, check parts, view product information, and track orders on the go. It aims to save time and reduce hassle for technicians in the field.

Real-time order statusView pricing and add to cartReal-time inventory availability

📊 Productivity

FAQ about Onus Customer

Are there free onus customer apps for iPhone?

Yes — 20 of the top onus customer apps we rank are free to download, including ONUS Customer and Onus Programming.

Does ONUS Customer have ads or in-app purchases?

ONUS Customer has no ads and has no in-app purchases, according to its App Store listing as of September 2026.

How many onus customer apps are on the App Store?

We track 250+ onus customer apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.