ACCA DuctWheel vs Bluon HVAC
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
ACCA DuctWheel
This app simplifies HVAC duct sizing using ACCA's Manual D standard. It offers an interactive digital wheel for various duct types, pressure calculations, and environmental corrections. Save snapshots and switch between calculation wheels for efficient design.
- ACCA Manual D compliant
- Digital duct sizing wheel
- Supports various duct types
- Converts round to rectangular ducts
- Calculates pressure and friction rate
- Altitude and temperature correction
- Snapshot saving
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Accurate HVAC duct sizing the easy way. DuctWheel is the only duct sizing measurement app powered by ACCA's Manual D, the ANSI standard for residential duct design. It features the same easy interface as the popular wheel sizing device that technicians have been using for years—now you can zoom in, lock the wheel in place, take a snapshot for future reference, and it never wears out! Flip between two different wheels for different calculations. Uses: Sizes metal ducts, lined metal ducts duct board airways, and wire helix flexible ducts; converts round shapes to equivalent rectangles; correlates available pressure with the total effective length and friction rate (Manual D Sizing Calculations); converts velocity pressure and vice versa; corrects for altitude and temperature. Includes instructions manual.
Bluon HVAC
Access a vast database of HVAC-R and plumbing unit documentation, including specs, manuals, and replacement parts. Get AI-powered troubleshooting and connect with live veteran technicians for support.
- 35,000,000+ HVAC unit database
- Model specs, age, and warranty info
- Original parts and replacement options
- AI-powered troubleshooting (Master Mechanic)
- Live veteran technician support line
- Supplier contact and ordering
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Bluon provides the technical information and support to tackle any job in HVAC-R and plumbing. Scan or search for any unit to find the documentation on over 35,000,000+ HVAC models across virtual every brand. Instantly access the key model specs, age/warranty, manuals, original parts, part specs, and replacement options. See which suppliers carry which part - you can even text/email them or order directly through their website. Get detailed troubleshooting guidance from MasterMechanic, our custom A.l. built with the database and with the problem/solution knowledge of over 135,000 live support calls, or call our Live Tech Support line to connect to our team of 25+ year veteran technicians. Bluon has your back. App Features Include: - Database of 35,000,000+ HVAC units (manuals, specs and part lists) - Master Mechanic: leading A.I. tool for techs - Live Support line: talk to REAL veteran techs to solve problems in the field!
Screenshots
Verdict
The clearest difference is price: Bluon HVAC at Free against ACCA DuctWheel's $24.99. Bluon HVAC also leads on rating (4.8 vs 3.3) and update cadence (monthly vs every 44 months). ACCA DuctWheel's advantage is ads (none vs shown) and iOS requirement (11.0 vs 15.1). On 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
Bluon HVAC is free to download; ACCA DuctWheel costs $24.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Bluon HVAC holds the better App Store score, 4.8 against 3.3. That said, the two scores are not equally well evidenced: Bluon HVAC has 4.5K ratings behind it against 13, so its average is the more settled of the two. Written reviews point the same way: 45% of ACCA DuctWheel's written reviews are positive against 55% of Bluon HVAC's.
ACCA DuctWheel ships an update every 44 months, Bluon HVAC monthly. The most recent releases landed on November 7, 2026 and November 6, 2026 respectively.
| Parameter | ACCA DuctWheel | Bluon HVAC |
|---|---|---|
| Price | $24.99 | Free — better |
| Rating | 3.3 (13 ratings) | 4.8 (4.5K ratings) — better |
| Positive reviews | 45.5% of reviews | 54.6% of reviews — better |
| Number of ratings | 13 | 4.5K — better |
| Update frequency | Every 44 months | Monthly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported — better |
| Devices | iPad | iPhone, iPad, iPod — better |
| Requires iOS | 11.0 — better | 15.1 |
| Further details — not scored | ||
| Size | 18 MB | 170 MB |
| Age rating | 4+ | 4+ |
| Developer | Air Conditioning Contractors of America | Bluon, Inc. |
Customer experience
ACCA DuctWheel
Bluon HVAC
Bugs and requests
ACCA DuctWheel
Not enough reviews yet to summarise bugs or requests.
Bluon HVAC
Reported bugs
2 issues- Login/password reset issues
- Frequent crashes or loading problems
Requested features
3 requests- Individual technician subscription option
- More comprehensive coverage of HVAC equipment models
- Ability to access full manuals without restrictions
In-app purchases
ACCA DuctWheel
No in-app purchases
Bluon HVAC
No in-app purchases
Questions
Is ACCA DuctWheel free?
Is Bluon HVAC free?
Which has better reviews, ACCA DuctWheel or Bluon HVAC?
Do ACCA DuctWheel or Bluon HVAC have ads?
Which is updated more often, ACCA DuctWheel or Bluon HVAC?
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