Add the first product to always know what's in the kit.
Group the products you wear together, like "everyday" or "going out", so you can grab the whole set at once.
Use the same code on the other device to keep both in step. No account needed, just the code.
Code:
Tap a month for a "use within X months of opening" product you've just opened.
Scan it once and you can check this product against a shelf later.
Tap anywhere on the photo, including a swatch printed on the packaging, to lift that colour.