Comparison

Geo vs Duct Calculator

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Geo

Features
Read full description

Master geometry with Geo-Matrix, the premier app for precise 2D and 3D shape calculations, unit conversions, and customizable precision settings. Designed for students, engineers and geometry professionals. Geo-Matrix offers a comprehensive suite of tools for accurate and efficient geometric analysis. From basic 2D shapes to advanced 3D solids, it delivers accurate results for critical parameters such as area, perimeter, volume, and more. With adjustable precision settings, seamless unit conversions, and customizable light/dark themes, Geo-Matrix offers a user-centric experience that ensures accuracy and flexibility for any geometry-related task. Key Features Precision Settings: Tailor calculations with customizable precision, ranging from 1 to 10 decimal places, to meet the highest standards of accuracy. Comprehensive Shape Categories and Calculations: 2D Shapes: Square, Rectangle, Triangle, Right-Angled Triangle, Circle, Pentagon, Hexagon. Calculations include Area, Perimeter, and Diagonals. 3D Shapes: Sphere, Cylinder, Cube, Cuboid, Square Pyramid, Cone. Calculations include Volume, Surface Area, and Diagonals. Unit Conversions: Effortlessly convert units for volume, area, and other measurements to streamline practical applications. Length Units: Meter (m), Centimeter (cm), Millimeter (mm), Foot (ft), Inch (in), Yard (yd) Area Units: Square Meter (m²), Square Centimeter (cm²), Square Inch (in²), Square Foot (ft²) Volume Units: Cubic Meter (m³), Cubic Centimeter (cm³), Liter (L), Milliliter (mL), Cubic Foot (ft³), Cubic Inch (in³). User-Friendly Interface: A sleek, modern design with intuitive navigation ensures fast and accurate results for users of all skill levels. Customizable Themes: Switch between light and dark modes for optimal visibility in various environments, enhancing user comfort. Favorites: Effortlessly Save and Access Your Most Frequently Used Shapes for Quick and Convenient Calculations, Streamlining Your Workflow and Saving Time

About

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.

Highlights
  • 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
Features
Read full description

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

Geo4 screens
Duct Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: Geo at none against Duct Calculator's 1. Geo also leads on update cadence (every 6 weeks vs every 10 months) and iOS requirement (13.0 vs 15.6). 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Duct Calculator sells 1 one-off in-app purchase. Geo asks for nothing beyond the download.

UpkeepUpdate frequency

Geo ships an update every 6 weeks, Duct Calculator every 10 months. The most recent releases landed on October 28, 2026 and October 26, 2026 respectively.

Scorecard3 real differences · 6 level
Geo versus Duct Calculator: the parameters behind the verdict, then further details
ParameterGeoDuct Calculator
PriceFreeFree
Rating—4.7 (3 ratings) — better
Number of ratings—3 — better
Update frequencyEvery 6 weeks — betterEvery 10 months
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size25 MB44 MB
Age rating4+4+
DeveloperReno SoftwaresSachinbhai Surani

In-app purchases

None

Geo

No in-app purchases

1 purchases

Duct Calculator

One-time1
  • Lifetime premium$9.99

Questions

Is Geo free?
Geo is free to download, with no in-app purchases.
Is Duct Calculator free?
Duct Calculator is free to download, with in-app purchases available.
Do Geo or Duct Calculator have ads?
Neither Geo nor Duct Calculator shows ads.
Which is updated more often, Geo or Duct Calculator?
Geo ships an update every 6 weeks, and Duct Calculator every 10 months. Most recently, Geo was updated on October 28, 2026 and Duct Calculator on October 26, 2026.

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