Show HN: Progressive Web App Timer for V60 Coffee

Hi HN! I made this little installable PWA to help me get a better sense of pour rates when making a V60, and it's really helped me so far. Since it was mostly meant for an audience of one, feature discoverability was less important to me than a clean UI. You can tap the water amount to switch coffee/water values.

I am specifically looking for feedback on screen wake locking. I have a Chrome origin trial set up for that, which means that the screen should never lock (in Chrome) when the timer is still running. I've found it hard to test if it really works well myself, so I'd really like to hear from people if it worked for them.