FLOAT - River & ZEN & Chill
Clean Rivers, Find Your Calm
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Winner of the 11th Digital Picture Book Award (November 2025), recipient of the Yuichi Kimura Prize.
Award-winning work of the Digital Picture Book Award(Japan)
FLOAT is an app that explores the issue of river litter.
In this version, you can play in four different rivers: the Arakawa River, the Nile River, the Yellow River, and the Mekong River.
[How to Play]
1. Choose a river.
2. Tap or swipe to create waves, move the litter, and collect it in the white basket.
[Time Warp]
With the Time Warp feature, you can travel back in time.
The types of litter and the creatures you encounter will change depending on the era.
[ZEN Mode]
Tap the switch in the upper-left corner of the play screen to open the options menu.
From there, you can turn on "ZEN Mode".
[Connecting the Game to the Real World]
By watching ads, making in-app purchases, or buying NFT art, you can support real-world river clean-up efforts.
Our team will actually collect litter from real rivers.
The following options are available:
#Plan-A
Watch a 30-second video ad
- Receive 4,000 in-app coins
- Our team will collect 2 pieces of litter from a real river
#Plan-B
Unlock 1 stage ($0.99)
- Our team will collect 4 pieces of litter from a real river
#Plan-C
Unlock all stages ($9.99)
- Our team will collect 15 liters of litter from a real river
*Any future locked content will be automatically unlocked after updates.
#Plan-D
Purchase special NFT art on OpenSea (FLOAT-RiverLitter)
- Our team will collect 1 liter of litter per 0.002 ETH
*Prices vary depending on the NFT.
*The collection amount may change if the price of Ethereum fluctuates significantly.
https://opensea.io/FLOAT-RiverLitter
*Please note:
In Plans B and C, litter collection is a secondary feature. The main benefit is unlocking game content.
For now, clean-up activities will take place on the left bank near the mouth of the Arakawa River (about 3 km upstream from Tokyo Bay), where litter tends to accumulate.
[Activity Reports]
You can check the total number of ad views and purchases on our website.
In the app, tap the "i" icon → tap "FLOAT REPORT" to visit the site.
Please note that updates may take a few weeks to appear.
We will regularly share:
- Total ad views
- Total purchases
- Proof photos of collected litter
For NFT sales, please check the OpenSea page.
This project is a social experiment.
We will continue improving it through trial and error.
All proceeds will be used for practical and educational efforts to address river and ocean litter.
[Notes]
#1 About Plastic
This app does not promote eliminating or avoiding plastic.
Plastic is a useful and important material in modern life.
We believe the real issues are:
- Illegal dumping
- Improper waste management
- Excessive use
#2 Performance Tips
If the water movement feels heavy:
Tap the gear icon on the title screen → tap the monitor icon → set graphics to "MID" or "LOW".
[Credits]
Design / Illustration / Text / Production: Tsutomu Kakinuma
Programming: Keijiro Iwase
Supervision: Kazuyuki Imamura
Music: K. Takeshi
Sound Effects: Yuki Horino
[Special Thanks 1]
180 Degrees Consulting Japan
Hibiki Abe / Ruki Ashikaga / Shunsuke Imura
[Special Thanks 2]
Attkun, Ayana, Joe, Jun, James, Ken, Kurikuri, Kouhei, Minami, Mitsuharu, Shiratama
FLOAT is supported by the Rethink Project and the River Fund.
https://rethink-pjt.jp
[Contact]
renraku@cleanaid.jp
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
This update from Apple will improve the functionality of this app. No new features are included.
Added content about types of river litter
The developer, ARAKAWA RIVER CLEAN-AID FORUM, N.P.O., indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Linked to You
The following data may be collected and linked to your identity:
- Location
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- ARAKAWA RIVER CLEAN-AID FORUM, N.P.O.
- Size
- 861.9 MB
- Category
- Entertainment
- Compatibility
Requires iOS 12.0 or later.
- iPhone
Requires iOS 12.0 or later. - iPad
Requires iPadOS 12.0 or later. - iPod touch
Requires iOS 12.0 or later. - Mac
Requires macOS 11.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Unlock-MekongRiver-1875 $0.99
- Unlock-YellowRiver-1875 $0.99
- Unlock-NileRiver-1975 $0.99
- Unlock-NileRiver-1875 $0.99
- Unlock-ArakawaRiver-1875 $0.99
- Unlock-ArakawaRiver-1975 $0.99
- Unlock all features $9.99
- Copyright
- ©️KAKINUMA Tsutomu ©️IWASE keijiro
