HVACsim vs Refrigerant Charge Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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!
Refrigerant Charge Calculator
This tool helps HVAC and refrigeration technicians quickly determine the correct refrigerant charge for various systems. It provides instant verdicts like 'Add,' 'Hold,' or 'Remove' based on superheat or subcooling measurements, supporting numerous refrigerants and unit conversions. The app functions offline and allows for saving job details and generating PDF reports.
- Charge check by superheat
- Charge check by subcooling
- Line-set charge estimation
- Pressure-Temperature reference
- Altitude-corrected pressures
- Saved jobs with GPS
- One-tap PDF job sheets
- Offline functionality
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Refrigerant Charge Calculator — built for working HVAC and refrigeration techs. Open it at the condenser, pick the refrigerant, type your superheat or subcooling, and get a clear field verdict: Add, Hold, or Remove. No classroom theory. No 20-step wizards. Just the number you need, in the unit you work in. WHAT YOU CAN DO • Charge check by superheat — fixed-orifice, piston, or cap tube systems, with target ranges interpolated from indoor wet-bulb and outdoor dry-bulb • Charge check by subcooling — TXV and EEV systems, measured against the nameplate target • Line-set charge estimation — add-a-length and long-line corrections done in seconds • Pressure–Temperature reference — 1-psig precision, with bubble, dew, and mid-point readings for zeotropic blends (glide shown explicitly) • Altitude-corrected pressures — auto-detected from your location, or set the elevation by hand • Saved jobs — address and GPS coordinates tagged from the map • One-tap PDF job sheets — header, readings, verdict, notes — ready to email to the building owner, property manager, or warranty adjuster • Unit toggles everywhere — °F / °C, psig / bar, imperial / metric line sets • Fully offline — attics, basements, rooftop curbs, mechanical rooms with no signal REFRIGERANTS COVERED — 86 TOTAL A2L low-GWP (2025 compliant) R-32 · R-454A · R-454B · R-454C · R-452B · R-457A · R-1234yf · R-1234ze(E) · R-1234ze(Z) · R-1243zf · R-1336mzz(E) HFC workhorses R-410A · R-410B · R-134a · R-404A · R-407A · R-407C · R-407F · R-448A · R-449A · R-449B · R-452A · R-507A · R-513A · R-515B Legacy and service blends R-22 · R-11 · R-12 · R-123 · R-124 · R-125 · R-500 · R-502 · R-417A · R-421A · R-422A · R-422B · R-422C · R-422D · R-427A · R-438A · R-453A Naturals R-290 propane · R-600a isobutane · R-717 ammonia · R-744 CO₂ · R-1270 propylene Plus 30+ less-common 400-series blends you won't find on a pocket slider — full list browsable inside the app. REFRIGERANT DETAIL PAGES Every refrigerant comes with the data you actually look up on the job: • GWP and ASHRAE safety class • Tank color code • Occupational Exposure Limit (OEL) • Temperature glide for blends • Critical point and molecular weight • Common applications and replacement notes WHO IT'S FOR • Residential and light-commercial HVAC service techs • Refrigeration techs working supermarket R-744 racks and R-290 cases • A2L installers catching up on R-454B and R-32 • Apprentices studying for EPA 608 and ESCO certification • Shop owners who want every tech reading the same charge verdict WHY TECHS CHOOSE IT • Offline-first — calculations run on device, no spinning loader in a crawlspace • No account required — open the app, run the math, close the app • Verdict first, numbers after — the screen tells you what to do before making you scroll • Your jobs stay on your phone — nothing leaves the device without a tap from you • Built by listening to techs, not classroom instructors Privacy Policy: https://docs.nikitin.fyi/com.hvacrcharge.app/privacy-policy.html Terms of Service: https://docs.nikitin.fyi/com.hvacrcharge.app/terms-of-service.html
Screenshots
Verdict
The clearest difference is rating: Refrigerant Charge Calculator at 4.7 against HVACsim's 2.2. HVACsim's advantage is iOS requirement (13.4 vs 17.0). On price, ratings volume, ads and in-app purchases 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 and Refrigerant Charge Calculator sells 2 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Refrigerant Charge Calculator holds the better App Store score, 4.7 against 2.2. Both are backed by a comparable volume of ratings — 13 and 26 respectively.
| Parameter | HVACsim | Refrigerant Charge Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 2.2 (13 ratings) | 4.7 (26 ratings) — better |
| Number of ratings | 13 | 26 — better |
| Update frequency | Every 2 months | — |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 13.4 — better | 17.0 |
| Further details — not scored | ||
| Size | 20 MB | 26 MB |
| Age rating | 4+ | 4+ |
| Developer | Nauman Innovation Group LLC | Mikhail Nikitin |
Customer experience
HVACsim
Refrigerant Charge Calculator
In-app purchases
HVACsim
- Full Access$29.99
Refrigerant Charge Calculator
- premium$4.991 Month
- premium7 Days trial$29.991 Year
Questions
Is HVACsim free?
Is Refrigerant Charge Calculator free?
Which has better reviews, HVACsim or Refrigerant Charge Calculator?
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