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Opportunity brief · Nov 1, 2026

BF Size Chart & Size Guide

Shopify Size chart app for Shopify. Create size charts & size guides for all your products in your Shopify store.

Revenue$418–3kEstimated
OpportunityNot scoredThe revenue range is wider than 3×, too uncertain to rank an opportunity on.
1–2★ ratings3%complaints from Nov 2020–Jun 2026, 33% in the last 24 months — mostly history
Build difficultyMediumShopify app review plus theme and express-checkout integration; no payments, regulation, hardware, or network effects.

The pitch, and what the numbers say

BF Size Chart & Size Guide — Product comparison · https://www.relentlessapps.com/

Estimated revenue: reviews × installs-per-review × paying share × entry price; every input is on the full x-ray.

Why users leave

The free diagnosis shows the top complaint. The full brief has every cluster, the build ideas and the buyers.

Bugs/Reliability · 67% of complaints read

App can render shop useless, size charts disappear after minutes, and editing two sites can lose all data.

“It will ruin your shop rendering it completely useless.”
+ 2 more complaint clusters, with verbatim quotes — in the full brief

What a challenger would build

3 build ideas, each answering a complaint above — in the full brief

Closest alternatives

Who is buying right now

No public buyer thread in the same market in the last 30 days. The scanner runs every 15 minutes.

Get the full BF Size Chart & Size Guide brief

Full 1-star breakdown with verbatim quotes, the build blueprint and every live thread — on every product.

How to read this

Sources: the product's public listing and reviews, its published price, and public forum threads. Revenue is an estimate unless marked verified by the founder; the formula and its inputs are on the full x-ray. Complaints are grouped by a language model and each quote is a verbatim excerpt, linked to the original review. Build difficulty is a model's reading of the listing and the complaints, not a measurement. Figures are a snapshot of Nov 1, 2026. Corrections: corrections.

Open the full x-ray →