The calculators from the CRIS app — free in your browser, no sign-up. They run on the same formulas as the app.
Climate, light and nutrients work together in the grow room, but you can only measure them apart. A thermometer tells you the temperature, a hygrometer the humidity — what the two of them together mean for the plant is on no display. That gap is what these calculators close.
They are lifted straight out of the CRIS app and run on the same formulas. Anyone using the app has them anyway — offline, and right next to the grow journal, so a measured value lands on the correct entry instead of on a note.
In the CRIS app the calculators sit right next to your grow journal — fully offline, no account, no ads.