LYNKUP vs Duct Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
LYNKUP
This voice-first assistant helps HVAC technicians troubleshoot issues hands-free using AI. It allows live streaming of tool data and offers direct support sessions with video and chat. Recorded sessions with transcripts are available for review and job management.
- Voice-activated AI troubleshooting
- Live Bluetooth tool data streaming
- Video, chat, and shared tool data support sessions
- Recorded sessions with transcripts
- Job history review and filtering
- Account, tool, and billing management
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LYNKUP is a voice-first sidekick for HVAC technicians. Talk to AiTAS to troubleshoot faster, keep your hands free, and stream live Fieldpiece readings over Bluetooth. Need a human? Jump into a live support session with video, chat, and shared tool data. Sessions are recorded with transcripts, and History lets you review, filter by date, and reopen past jobs. Manage your account, tools, and billing from Settings.
Duct Calculator
This professional HVAC utility assists engineers and technicians with precise duct sizing and airflow calculations for ventilation systems. It simplifies essential calculations for both design and installation work, improving on-site efficiency.
- Calculate duct sizes using airflow (CFM) and velocity (FPM)
- Supports rectangular and round duct sizing in inches
- Determine air flow rate in CFM
- Calculate air velocity in FPM
- Simple interface for fast on-site calculations
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Duct Calculator is a focused duct sizing tool for HVAC engineers, designers and installation technicians. Enter what you know and get the duct dimensions, airflow or air velocity you need, without a chart or a slide rule. CALCULATIONS - Duct size: find the required duct dimensions from airflow (CFM) and air velocity (FPM). - Airflow: determine the airflow rate in CFM. - Air velocity: determine velocity in FPM to help verify system performance. DUCT SHAPES - Round ducts - Rectangular ducts - Results shown in inches WHO IT IS FOR - HVAC engineers and designers checking a duct size during design work. - Installation technicians and contractors who need a quick answer on site. - Students learning how airflow, velocity and duct size relate. WHERE IT HELPS - Sizing a new supply or return run from a known CFM. - Checking whether an existing duct keeps velocity within your target. - Comparing a round duct with a rectangular one when space is tight. SIMPLE BY DESIGN A clean interface with only the inputs you need, so you get an answer quickly on the job. Duct Calculator is free to use. An optional one-time upgrade removes ads. Results are intended as a calculation aid. Always confirm designs against applicable codes and project requirements. Download Duct Calculator and size your next duct run. Privacy Policy : https://semiconhub.in/manager/privacy.html Terms and Condition : https://semiconhub.in/manager/tcondition.html
Screenshots
Verdict
The clearest difference is in-app purchases: LYNKUP at none against Duct Calculator's 1. LYNKUP also leads on rating (5.0 vs 4.7) and update cadence (every 2 months vs every 10 months). On price, ratings volume, 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. Duct Calculator sells 1 one-off in-app purchase. LYNKUP asks for nothing beyond the download.
LYNKUP holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 2 and 3 respectively.
LYNKUP ships an update every 2 months, Duct Calculator every 10 months. The most recent releases landed on October 30, 2026 and November 1, 2026 respectively.
| Parameter | LYNKUP | Duct Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (2 ratings) — better | 4.7 (3 ratings) |
| Number of ratings | 2 | 3 — better |
| Update frequency | Every 2 months — better | Every 10 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free — better | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.1 — better | 15.6 |
| Further details — not scored | ||
| Size | 165 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | LYNKUP, LLC | Sachinbhai Surani |
Customer experience
LYNKUP
Duct Calculator
In-app purchases
LYNKUP
No in-app purchases
Duct Calculator
- Lifetime premium$9.99
Questions
Is LYNKUP free?
Is Duct Calculator free?
Which has better reviews, LYNKUP or Duct Calculator?
Do LYNKUP or Duct Calculator have ads?
Which is updated more often, LYNKUP or Duct Calculator?
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