Slow the Flow makes your hidden water footprint visible — and gives you the tools to shrink it before 2040 runs out.
Because of the cotton in your jeans.
I was sixteen when I first saw a satellite image of the Aral Sea — the world's fourth-largest lake reduced to scattered desert puddles in a single generation. Not by drought. Not by climate change. By the t-shirts and jeans people like me buy without thinking.
The Soviet Union redirected the rivers that fed the sea to irrigate cotton fields. In forty years, a body of water the size of Ireland was gone. 3.5 million people lost their livelihoods. The mechanism was virtual water — the invisible volume of water embedded in every product we consume. This water doesn't appear on any price tag. It just disappears from somewhere else on Earth.
When I understood this, I couldn't unsee it. I opened Thunkable and started building.
I'm Aryan Aggarwal — a student developer and competitive researcher from New Delhi who believes the most important problems are ones most people can't see.
My path to Slow the Flow runs through competitive mathematics. The chess board taught me to think several moves ahead. The olympiad circuit — where I've competed from Taiwan to Singapore to the US — trained me to work under constraint, to find the elegant solution when brute force fails. Global Rank 3 at WMI. State Topper in NSEJS. AMC-10 School Rank 1.
Those aren't separate pursuits from Slow the Flow. They're the same muscle — structured thinking applied to hard problems. I built Slow the Flow alone, from research to APK, while preparing for national science examinations. It's live on the Play Store. It's won a competition. And it's still running.
Not a school project — a production Android app live on the Google Play Store, built independently using visual and native development frameworks.
Awarded 3rd Position at ROBOTRON Inter-School STEM Fest for mobile coding frameworks.
The hidden water footprint in everything we consume
Your Choices Matter — ready to find out your footprint?
Answer a few questions to calculate your virtual water consumption
Here's your annual virtual water consumption
Follow these tips to reduce your water footprint
By following your personalized plan, you will:
Every number in Slow the Flow is sourced from peer-reviewed research, UN agency reports, or internationally recognised water research institutions. This page documents each figure, its source, the year of publication, and how it was applied in the calculator.