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.
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