Airmil２ vs Kachaka
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Airmil２
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1] Application Overview This is an application that displays the measured values and graphs of temperature, humidity, CO2 concentration, PM2.5 concentration, VOC concentration, air pressure, and UV index measured by RATOC System's Wi-Fi environment sensor RS-WFEVS1. [2] Features Real-time display of temperature, humidity, CO2, PM2.5, VOC, barometric pressure, and UV values Displays graphs by day (1 minute), week (1 hour), and month (1 month). The color of the graph visually indicates safety, caution, etc. Environment advisor displays the comfort level of the room. Save measurement data as a CSV file Saves measured data as a CSV file. Notifies the user's smartphone when the measured value of CO2 or VOC exceeds the specified value. 3] Operating environment Models equipped with iOS 12.0 or later
Kachaka
Transform your living space with smart furniture that moves autonomously. Create dynamic room layouts for living, dining, or kitchen use with simple app controls. Schedule furniture movements for daily routines or convenience.
- Autonomous furniture movement
- Customizable room layouts
- One-tap shortcut controls
- Schedule furniture for routines
- Designate no-entry zones
- Voice command integration
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With the ease of moving furniture, you can create new layouts without changing the size of the room. With smart furniture, your room can serve as a living room, dining room, or kitchen. Incorporate 'autonomous furniture movement' into your everyday life. ● Easy Control with Shortcuts Set up shortcuts for the furniture you move daily through the app, enabling a one-tap movement. ● Intuitive Understanding of Kachaka's Status Grasp an intuitive understanding of Kachaka's current position, scanned room layout, destinations, and other various information. ● Schedule Function for Habit Formation and Forgetfulness Prevention Specify dates and days to have Kachaka bring furniture to you. Whether it's having your bag and watch brought to the entrance every morning, your reading stack by the bed every night, or snacks delivered from the kitchen to your study desk during snack time, how you utilize Kachaka is up to you. ● Other Convenient Features Designate no-entry zones where you don’t want Kachaka to enter. Remote control operation to move Kachaka. Command Kachaka with voice commands without opening the app. Requirements: * The real robot "Kachaka" is required for use. Sales are only conducted within Japan. * Compatible with iOS 14.0 and later.
Screenshots
Verdict
The clearest difference is update cadence: Kachaka at every 5 weeks against Airmil２'s every 5 months. Airmil２'s advantage is iOS requirement (12.0 vs 15.6). On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Airmil２ ships an update every 5 months, Kachaka every 5 weeks. The most recent releases landed on October 4, 2026 and November 3, 2026 respectively.
| Parameter | Airmil２ | Kachaka |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 34 MB | 94 MB |
| Age rating | 4+ | 4+ |
| Developer | RATOC Systems, Inc. | Preferred Robotics, Inc. |
In-app purchases
Airmil２
No in-app purchases
Kachaka
No in-app purchases
