# DuctSizer vs Modela AIoT Device

The clearest difference is price: Modela AIoT Device at Free against DuctSizer's $4.99. DuctSizer's advantage is update cadence (every 4 days vs monthly) and iOS requirement (12.0 vs 15.5). On review sentiment, ads, in-app purchases and device support there is nothing between them.

Modela AIoT Device 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, Modela AIoT Device monthly. The most recent releases landed on October 14, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | DuctSizer | Modela AIoT Device |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Monthly |
| Monetization | Paid | **Free** |
| Size | 57 MB | 48 MB |
| Requires iOS | **12.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Mulberrysoft](https://appshunter.io/developer/1612779919) | [Modela IoT](https://appshunter.io/developer/1759491002) |

## 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, Vision Pro support

**In-app purchases:** none


### Modela AIoT Device

[App page](https://appshunter.io/ios/app/modela-aiot-device/id6736358188)

This application offers a comprehensive IoT solution with AI analysis and camera integration. It allows users to easily control and automate electrical devices via smartphone or web dashboard. The platform supports a wide range of sensors and devices, making smart home or business automation accessible and affordable.

**Highlights:** Control Modela WiFi IoT boxes and AiCam, Unlimited IoT device addition, Supports up to 20 sensors per control box, Automated device control based on sensor readings, Customizable scheduling for device operation, Real-time and historical data graphing, OTA software updates

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is DuctSizer free?

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

### Is Modela AIoT Device free?

Modela AIoT Device is free to download, with no in-app purchases.

### Do DuctSizer or Modela AIoT Device have ads?

Neither DuctSizer nor Modela AIoT Device shows ads.

### Which is updated more often, DuctSizer or Modela AIoT Device?

DuctSizer ships an update every 4 days, and Modela AIoT Device monthly. Most recently, DuctSizer was updated on October 14, 2026 and Modela AIoT Device on October 11, 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.*