Danfoss Troubleshooter vs HVACsim
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Danfoss Troubleshooter
This app helps HVACR technicians diagnose and resolve system issues. It guides users through common symptoms, identifies potential causes, and recommends solutions. An offline database is available for use in remote locations.
- Diagnose HVACR system issues
- Identify common symptoms
- Recommend solutions
- Offline database access
- Streamlined interface
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Troubleshooter is now part of the new Ref Tools app, our essential, all-in-one mobile app for air conditioning and refrigeration technicians. Ref Tools gives you access to the tools, guidance, support, and information you need—on the job and in the field. Download Ref Tools to access the latest version of Troubleshooter. Troubleshooter helps you diagnose and resolve many issues that pop up in HVACR systems. Through a streamlined and easy-to-navigate interface, you can check on specific parts of a system and search through the most common symptoms. Once you’ve identified the problem, Troubleshooter recommends possible solutions for you to try. Troubleshooter is a valuable, time-saving app for installers and service technicians, enabling you to quickly resolve service calls and move on to the next one. You can also download Troubleshooter’s database, so you can use it with or without an internet connection—which is great for remote service destinations. How to use Troubleshooter When you start up Troubleshooter, you’ll see a refrigeration system divided into four main areas: low pressure, high pressure, compressor, and liquid line components. Select one of the four areas and you will be able to search through potential symptoms for that area in the system. Once you identify the correct symptom, Troubleshooter will show you the possible causes for that symptom and the steps required to correct it. It’s easy to move back and forth between the symptom/cause and the solution pages. Support For app support, please use the in-app feedback function found in the app settings or send an email to coolapp@danfoss.com Engineering Tomorrow Danfoss engineers advanced technologies that enable us to build a better, smarter and more efficient tomorrow. In the world’s growing cities, we ensure the supply of fresh food and optimal comfort in our homes and offices, while meeting the need for energy-efficient infrastructure, connected systems and integrated renewable energy. Our solutions are used in such areas as refrigeration, air conditioning, heating, motor control and mobile machinery. Our innovative engineering dates back to 1933 and today, Danfoss holds market-leading positions, employing 28,000 people and serving customers in more than 100 countries. We are privately held by the founding family. Read more about us at www.danfoss.com. Terms and Conditions apply for use of the app.
HVACsim
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 Evaluator
- Individualized Learning Plans
- Real-World Data Analysis
- Team Management Tools
- Continuous Learning Library
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Master HVAC Skills with the HVAC Simulator App! The HVAC Simulator app revolutionizes training by combining real-world data analysis with interactive learning. Designed for technicians, contractors, and educators, this app helps you build confidence in diagnosing and troubleshooting HVAC systems efficiently. Key Features Technical Knowledge Evaluator Assess your HVAC skills through realistic scenarios. Identify gaps in understanding and get targeted recommendations. Individualized Learning Plans (ILP) Personalized training paths tailored to your specific needs. Evolve and reassess as you progress, ensuring continuous improvement. Real-World Practice Analyze system data like electrical readings, pressures, and temperatures. Simulate real-life scenarios in a risk-free environment. Team Management Tools (for Contractors) Assess and track your team’s technical knowledge. Create custom in-house training programs based on performance data. Continuous Learning Stay updated with new HVAC technologies and techniques. Access a library of courses covering both basics and advanced topics. Why Choose HVAC Simulator? Build diagnostic accuracy with data-driven learning. Strengthen critical thinking and troubleshooting skills. Reduce callbacks with more efficient team training. Interactive and engaging simulations for practical learning. For Technicians: Boost your confidence and master HVAC diagnostics through hands-on scenarios. For Contractors: Empower your team with tools to create stronger, more skilled technicians. For Educators: Enhance classroom learning with real-world-focused training resources. Download HVAC Simulator Now and Start Your Journey to HVAC Mastery! Transform the way you learn, train, and excel in the HVAC industry today!
Screenshots
Verdict
The clearest difference is rating: Danfoss Troubleshooter at 3.7 against HVACsim's 2.2. Danfoss Troubleshooter also leads on in-app purchases (none vs 1) and iOS requirement (11.0 vs 13.4). HVACsim's advantage is update cadence (every 2 months vs every 5 months) and ratings volume (13 vs 3). On price, ads 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
Both are free to download. HVACsim sells 1 one-off in-app purchase. Danfoss Troubleshooter asks for nothing beyond the download.
Danfoss Troubleshooter holds the better App Store score, 3.7 against 2.2. Both are backed by a comparable volume of ratings — 3 and 13 respectively.
Danfoss Troubleshooter ships an update every 5 months, HVACsim every 2 months. Both last shipped on October 24, 2026.
| Parameter | Danfoss Troubleshooter | HVACsim |
|---|---|---|
| Price | Free | Free |
| Rating | 3.7 (3 ratings) — better | 2.2 (13 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 3 | 13 — better |
| Update frequency | Every 5 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 11.0 — better | 13.4 |
| Further details — not scored | ||
| Size | 56 MB | 20 MB |
| Age rating | 4+ | 4+ |
| Developer | Danfoss A/S | Nauman Innovation Group LLC |
Customer experience
Danfoss Troubleshooter
HVACsim
In-app purchases
Danfoss Troubleshooter
No in-app purchases
HVACsim
- Full Access$29.99
Questions
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