BOHN vs Duct Calculator.
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
BOHN
This app provides a comprehensive catalog of refrigeration products, featuring technical specifications, pricing, and catalogs. Users can perform quick equipment calculations for specific applications and share them. Direct contact with the company is available through email or the app's web page.
- Product catalog access
- Technical specifications
- Pricing information
- Equipment calculation tool
- Direct contact options
- Improved search functionality
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Bohn, la línea más completa en refrigeración a tu alcance. Conoce en esta nueva versión las mejoras de búsqueda de nuestros productos, características técnicas, precios, catálogos y precios. Realiza cálculos rápidos de equipos de acuerdo a la aplicación y envíalos a tus contactos. Entra en contacto con nosotros directamente de nuestra aplicación vía email o página web. En BOHN continuamos mejorando la experiencia de usuario.
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 professional HVAC utility designed to help engineers and technicians accurately calculate duct sizes and airflow values for ventilation systems. Built for real-world design and installation work, this app simplifies essential HVAC calculations and improves efficiency on the job. The app allows users to calculate required duct sizes using available airflow (CFM) and air velocity (FPM). Both rectangular and round duct sizes can be calculated in inches, making it suitable for a wide range of HVAC projects. In addition to duct sizing, Duct Calculator can also determine air flow rate in CFM and air velocity in FPM, helping professionals verify system performance and ensure proper ventilation. Key Features: Calculate required duct dimensions using CFM and FPM values. Supports both rectangular and circular duct sizing in inches. Calculate air flow rate accurately in CFM. Determine air velocity in FPM for system Ideal for HVAC engineers, designers, and installation technicians. Simple interface for fast calculations on-site or during design work. Duct Calculator is a reliable and practical tool for heating, ventilation, and air conditioning professionals involved in the design, installation, and construction of ventilation systems. in-app purchase included Lifetime to Remove Ads 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: BOHN at none against Duct Calculator.'s 1. BOHN also leads on rating (5.0 vs 4.7) and update cadence (every 3 months vs every 10 months). Duct Calculator.'s advantage is ratings volume (3 vs 1). 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. Duct Calculator. sells 1 one-off in-app purchase. BOHN asks for nothing beyond the download.
BOHN holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 1 and 3 respectively.
BOHN ships an update every 3 months, Duct Calculator. every 10 months. The most recent releases landed on October 7, 2026 and October 12, 2026 respectively.
| Parameter | BOHN | Duct Calculator. |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | 4.7 (3 ratings) |
| Number of ratings | 1 | 3 — better |
| Update frequency | Every 3 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 | 12.1 — better | 15.6 |
| Further details — not scored | ||
| Size | 15 MB | 44 MB |
| Age rating | 4+ | 4+ |
| Developer | armando monroy | Sachinbhai Surani |
Customer experience
BOHN
Duct Calculator.
In-app purchases
BOHN
No in-app purchases
Duct Calculator.
- Lifetime premium$9.99
Questions
Is BOHN free?
Is Duct Calculator. free?
Which has better reviews, BOHN or Duct Calculator.?
Do BOHN or Duct Calculator. have ads?
Which is updated more often, BOHN or Duct Calculator.?
Other comparisons
