# DuctSizer vs Maker Robotics

The clearest difference is price: Maker Robotics at Free against DuctSizer's $4.99. DuctSizer's advantage is iOS requirement (12.0 vs 15.6). On update cadence, ads, in-app purchases and device support there is nothing between them.

Maker Robotics is free to download; DuctSizer costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

DuctSizer ships an update every 4 days, Maker Robotics weekly. The most recent releases landed on June 1, 2026 and September 21, 2026 respectively.

## The numbers

| Metric | DuctSizer | Maker Robotics |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Weekly |
| Monetization | Paid | — |
| Size | 57 MB | 30 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [MULBERRYSOFT COMPANY LIMITED](https://appshunter.io/developer/1612779919) | [Maker Robotics Co.,Ltd.](https://appshunter.io/developer/1810937123) |

## What reviewers say

### DuctSizer

[App page](https://appshunter.io/ios/app/ductsizer/id6467117263)

This utility app provides a quick and accurate ductulator for calculating equivalent round and rectangular duct sizes. It supports both Imperial and SI units, offering a simple finger-slide interface for fast computations.

**Highlights:** Quick duct size calculations, Accurate results, Equivalent round and rectangular sizes, IP and SI unit support, Finger slide interface

**Features:** macOS Compatibility

**In-app purchases:** none


### Maker Robotics

[App page](https://appshunter.io/ios/app/maker-robotics/id6756576979)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is DuctSizer free?

DuctSizer costs $4.99, with no in-app purchases.

### Is Maker Robotics free?

Maker Robotics is free to download, with no in-app purchases.

### Do DuctSizer or Maker Robotics have ads?

Neither DuctSizer nor Maker Robotics shows ads.

### Which is updated more often, DuctSizer or Maker Robotics?

DuctSizer ships an update every 4 days, and Maker Robotics weekly. Most recently, DuctSizer was updated on June 1, 2026 and Maker Robotics on September 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*