Starting point
For women
Where a wardrobe gets hard when sizing is inconsistent, the rules are unwritten, and your body changes across the month.
The product is the same for everyone. What differs is which problem you hit first. Nothing below is a claim about how much you own or how much you care about clothes.

Where it actually gets hard
Sizing is not a number. The same nominal size varies by several centimetres between brands, and often between two items from the same brand. That is most of why online returns run so high. An avatar with your actual proportions is worth more here than almost anywhere.
Each garment carries a dozen facts. Whether it is opaque under bright light. Whether it rides up when you sit. Whether it creases in a car. Whether it needs a particular bra, or cannot take one at all. Whether the neckline gives a lapel mic anything to clip to. Each fact is learned once, usually the hard way, and then has to be remembered forever. There is no reason for it to live in your memory rather than on the item.
Your body is not the same shape every week. Fit changes across a cycle. The waistband that is comfortable on one day is not on another, and the trousers you reach for on a bad day are a specific known pair, which you re-derive every month. The same holds through pregnancy and after it, through weight change, illness, injury, a cast, or simply a decade. A digital body that is current turns “does this still fit” from a question into a fact.
The rules are unwritten and still enforced. Not white at a wedding, and not cream or ivory either. Covered shoulders at that site visit. Too short for that office, and nobody will define too short. Every one of them is unstated, and every one is noticed.
What the app does about it
What happens
Whether something works is not knowable from the hanger, and trying it on costs five minutes each time.
What DROBE does
On the avatar, full length, in seconds - for anything, not only the item you already suspected.
What happens
The facts about a garment - sheer, creases, rides up, needs the right bra - get relearned the hard way, repeatedly.
What DROBE does
They sit on the item instead, the way a care label does.
What happens
Two brands, same size on the label, different garment. So ‘my size’ tells you very little.
What DROBE does
Proportions rather than a label. Fit becomes something you can see instead of something you infer.
What happens
On the days your body feels different, you rebuild the same short list of comfortable things from scratch.
What DROBE does
That list is a saved set. You built it once, on a day when you had the patience for it.

Start with an ordinary Tuesday, or with the invitation that said smart casual.