Comparison

Sowester vs Kachaka

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

Head to head
About

Sowester

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Sowesterの公式アプリをリリースしました! このアプリでは、Sowesterの最新情報の受け取りや便利な機能を使う事ができます。 【アプリで出来ること】 本アプリを利用して以下のことが行えます。 1.最新情報をチェック!  Sowesterのサービス内容が確認できます。  また、お店からメッセージが届くので、いつでも最新の情報がご確認いただけます。 2.マイページで情報を確認!  Sowesterのご利用状況が確認できます。 3.友達に紹介!  SowesterのアプリをSNSを通じてお友達に紹介する事ができます。 4.他にも便利な機能満載!

About

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.

Highlights
  • Autonomous furniture movement
  • Customizable room layouts
  • One-tap shortcut controls
  • Schedule furniture for routines
  • Designate no-entry zones
  • Voice command integration
Features
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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

Sowester3 screens
Kachaka4 screens

Verdict

The call

The clearest difference is update cadence: Kachaka at every 6 weeks against Sowester's every 29 months. Sowester's advantage is iOS requirement (9.0 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

CostPrice · In-app purchases · Ads · Monetization

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

UpkeepUpdate frequency

Sowester ships an update every 29 months, Kachaka every 6 weeks. The most recent releases landed on September 15, 2026 and September 22, 2026 respectively.

Scorecard2 real differences · 7 level
Sowester versus Kachaka: the parameters behind the verdict, then further details
ParameterSowesterKachaka
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 29 monthsEvery 6 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS9.0 — better15.6
Further details — not scored
Size17 MB91 MB
Age rating4+4+
DeveloperSHUJI TOYOZATOPreferred Robotics, Inc.

In-app purchases

None

Sowester

No in-app purchases

None

Kachaka

No in-app purchases

Questions

Is Sowester free?
Sowester is free to download, with no in-app purchases.
Is Kachaka free?
Kachaka is free to download, with no in-app purchases.
Do Sowester or Kachaka have ads?
Neither Sowester nor Kachaka shows ads.
Which is updated more often, Sowester or Kachaka?
Sowester ships an update every 29 months, and Kachaka every 6 weeks. Most recently, Sowester was updated on September 15, 2026 and Kachaka on September 22, 2026.

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