Free tool
What is missing from your collection?
Add what you own and the chart fills in. What it shows is not what your watches are worth but what they cover, and the interesting part is always the shape that stays empty.
Coverage, not value
Nothing added yet. Pick something above, or start with the watch you wear most.
Why collections cluster instead of spreading
Almost everyone buys the same watch repeatedly. You develop a taste, that taste points at a category, and the second and third purchase land next to the first. The result is three dive watches and nothing to wear to a wedding.
This is not irrational, because you are buying what you like. It only becomes a problem when you believe you are building a collection that covers your life, since the chart above will show you a tall spike and a lot of empty space.
The useful question when buying a second or third watch is not what you want, it is what your existing watches cannot do. That question produces very different answers, and it is the one thing this tool is designed to make unavoidable.
How many watches is enough
Coverage is usually complete at three. Something for every day, something that can get wet without thought, and something formal enough for occasions where a sports watch would look wrong. A fourth adds travel, if you genuinely cross time zones.
Past that point you are not filling gaps, you are collecting, and that is a completely legitimate thing to do. The distinction matters only because pretending otherwise leads people to justify a fifth diver on practical grounds it cannot support.
There is also a real case for one. A single 38 to 40 mm watch with 100 m water resistance on a bracelet handles nearly everything an ordinary life presents, and wearing one watch constantly builds a relationship with it that a rotation never quite does.
The watches worth selling
Most collections contain at least one watch that has not been worn in a year and covers nothing the others do not. It still depreciates, still needs servicing eventually, and still occupies attention.
Selling it is usually right, with one clear exception. Anything inherited was never bought for coverage, and applying this logic to a grandfather's watch misunderstands what it is. Keep those regardless of what the chart says.
For everything else, the test is simple: if you were offered its current market value in cash today, would you take it? If the answer comes easily, you have your answer about the watch.
Common questions
What should my second watch be?
Whatever your first cannot do. Started with a diver? The gap is formality. Started with a dress watch? The gap is water and hard wear. Buying something similar to what you already own is the most common collecting mistake.
Is one watch enough?
For most people, yes. A 38 to 40 mm watch with 100 m water resistance covers almost every ordinary situation. More watches are about enjoyment rather than necessity, which is a fine reason but a different one.
Should I sell what I never wear?
Usually, unless it was inherited. An unworn watch still depreciates and still needs servicing. Inherited pieces were never about coverage, so this logic does not apply to them.
Is my data uploaded anywhere?
No. Your list is stored in your own browser and never sent anywhere. Clearing your browser data will erase it.
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