Seller Tales / N° 001 — 003

Know what your store really earns.

Step-by-step guides on profit, apps, product research, traffic and conversion — with the formulas, worked examples, and honest limits included. Written for people who sell online and want the real numbers, not the highlight reel.

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OUR TOOL · SEP 15 LAUNCH

Vellona — EU GPSR compliance, automated

Since 2026, EU customs detain non-compliant shipments. Vellona batches safety metafields, generates public safety pages, and scans your store for missing GPSR data before products go live.

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Featured guides

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N°001 Profit analytics

How to Calculate True Profit per Order on Shopify — Step by Step

Shopify's revenue number is not your profit. Use this step-by-step formula — COGS, fees, shipping, ads, refunds — to find each order's true profit.

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N°002 Profit analytics

The 20-Minute Shopify App Audit That Saved Me $600/Year

I built a stupid-simple decision matrix. In 20 minutes, it found $50/month in waste. Here's the exact template — copy it, run your own app list through it, and

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N°003 Conversion optimization

Upgrading to Shopify's New Checkout: 3 Bugs That Cost Me 20% of Orders

After the forced migration to Checkout Extensibility, three silent bugs slipped through testing and cost me nearly $2,000 in lost orders. Here's exactly what br

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Browse by topic

Profit analytics Know what each order really earns after every cost. 25 guides Shopify apps Apps worth considering — and when to skip them. 32 guides Product research Validate ideas with data before spending on inventory. 1 guide Traffic acquisition Paid and organic channels, judged on real cost. 24 guides Conversion optimization Turn more of the traffic you already pay for. 12 guides

How this site works

Seller Tales is free to read, and every guide gives you the full method — formulas, examples, and manual approaches — before any tool gets mentioned. It is also published by JoyCraft, the maker of Vellona (automated EU GPSR compliance for Shopify) and CostPilot Pro (storefront app audits). When our own tools are relevant to a topic, we say so in the article, and links to JoyCraft products may carry tracking parameters.

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