A market share is a number plus three choices.

Who counts as a competitor, how the area is drawn, and what is being shared out. Change any one and the answer changes — usually by more than the market ever does. This app puts all three on a bench, prints the derivation, and shows you every other defensible answer to the same question.

Same ground, same question — how many grocery competitors are here?
OpenStreetMap shop=supermarket → 113
SafeGraph naics_code='445110' → 323
SafeGraph naics_code LIKE '4451%' → 433
A nine-store brand therefore holds 8.0%, 2.8% or 2.1%.

No Huff model runs here. Nothing is calibrated. Every catchment is a stated distance, a measured drive time, or a parameter-free proximity comparison.

Catchment & Market-Share Analyzer

Grocery · Long Beach–Torrance —
Take this reading with you
You sell
Who counts · the denominator
Where · the area

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ours
of
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in the market
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The spread — every other defensible reading

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Hover a tick to preview it · click to adopt it · ← → to step through them.

What is being shared out

Households in catchment—
Category demand / yr—
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Position vs capture

Positioned to win—
Actually captured—
Fair-share gap—
Capture and gap need your sales or customer file. Without it this app reports position only — it will not invent the number.
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Why this number — the derivation

BrandOutletsShare Rankvs other registerIdentity