Click for energy, buy multipliers and a decaying passive generator, with max-buy and offline credit.
Offline progress: the generator term is integrated analytically over the gap (E(t) = E0 * e^(-kt) + P0 * (1 - e^(-kt)) / k) and credited when the tab is reopened, so a closed tab is a pause, never a loss. Manual click energy is not credited offline - a click needs a click.

Enter a due date and map the pregnancy: current week, trimester, days left and a 40-week grid.

Nine holes, thirty seconds and a combo that pays more the longer the streak survives. Score, best combo and a high score kept in your browser, so the win condition is simple: beat your best.

Drop blocks and grow a little isometric city block by block.

Enter a due date and map the pregnancy: current week, trimester, days left and a 40-week grid.

Mifflin-St Jeor and Katch-McArdle BMR, TDEE and a macro split in grams and calories.

US Navy circumference body fat percent, lean mass, fat mass and fitness band.

Devine, Robinson, Miller and Hamwi side by side, plus the healthy BMI band.

Reduce a ratio with GCD, scale it, split a whole, and convert seven unit pairs.