# 에이오 IoT vs Coffimer

The clearest difference is monetization model: 에이오 IoT at free against Coffimer's ad-supported. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

에이오 IoT ships an update every 5 months, Coffimer every 3 months. The most recent releases landed on September 30, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | 에이오 IoT | Coffimer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/coffimer/id6747644924/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 3 months** |
| Monetization | **Free** | Ad-supported |
| Size | 28 MB | 53 MB |
| Requires iOS | 15.1 | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [이지테크](https://appshunter.io/developer/1491873261) | [minseok bang](https://appshunter.io/developer/1822153473) |

## What reviewers say

### 에이오 IoT

[App page](https://appshunter.io/ios/app/iot/id1617202679)

Monitor indoor and outdoor air quality from anywhere. Connect your device via Wi-Fi to view real-time air information for your registered locations. Check air quality anytime, anywhere.

**Highlights:** Real-time indoor and outdoor air quality monitoring, Remote access to air information, Wi-Fi connectivity for device setup, View air quality for registered locations, Check air quality anytime, anywhere

**Features:** macOS Compatibility

**In-app purchases:** none


### Coffimer

[App page](https://appshunter.io/ios/app/coffimer/id6747644924)

This app provides precise timing and step-by-step guidance for brewing various coffee recipes. It includes verified methods from renowned baristas and supports multiple dripper types, helping users achieve the perfect cup.

**Highlights:** Wide range of coffee recipes, Step-by-step brewing guide, Precise timer functionality, Sound notifications for brewing steps, Optimized methods for various drippers, Detailed recipe information

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

**In-app purchases:** none


## Frequently asked questions

### Is 에이오 IoT free?

에이오 IoT is free to download, with no in-app purchases.

### Is Coffimer free?

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

### Do 에이오 IoT or Coffimer have ads?

Neither 에이오 IoT nor Coffimer shows ads.

### Which is updated more often, 에이오 IoT or Coffimer?

에이오 IoT ships an update every 5 months, and Coffimer every 3 months. Most recently, 에이오 IoT was updated on September 30, 2026 and Coffimer on September 22, 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.*