Support
Get help with Solvi Barcode Labels
Support runs on email — no chat widget that leaves you waiting. Every message gets a reply from the person who builds the app.
Email us
We reply within 24 hours — usually faster. Include your label reference (e.g. Avery 5160) and, for printing issues, the sheet PDF: it lets us answer in one round trip.
support@useful-tooling.com
Happy with the app?
A review on the App Store is the most useful thing you can do for a small independent app. We read and publicly answer every single one.
Answers you might need right now
The most common support topics are already answered in the FAQ on the app page:
- Does it work with Avery, Dymo, Zebra and Brother labels?
- My printed sheet doesn’t line up with the labels. What do I do?
- Can I print different quantities for different products?
- How does the app prevent duplicate barcodes?
- Can I keep the UPC/EAN codes my products already have?
- What does the Free plan include?
Guides for Barcode Labels
Self-serve walkthroughs for printing, calibration and barcode generation — most printing issues are solved by one of these.
How-to
How to print Avery 5160 barcode labels from Shopify
The exact Avery 5160 geometry — 2.625″ × 1″ labels, 30 per sheet — plus the step-by-step workflow and print settings that keep all thirty barcodes aligned.
8 min read
How-to
How to print barcode labels on a Dymo printer from Shopify
Rolls are not sheets: set the PDF page size to the label size, print at 100%, and use die-cut media — barcode printing on a Dymo LabelWriter, step by step.
8 min read
How-to
How to print barcode labels on a Zebra printer from Shopify
Zebra printers speak two languages — ZPL and plain PDF. For Shopify product labels, the PDF route wins: set the page size to the label size, calibrate the media, print at 100%. Step by step.
8 min read
How-to
How to print barcode labels on a Brother QL from Shopify
Brother QL printers take two kinds of DK rolls — die-cut and continuous — and the setting that ruins barcodes is auto-cut length. Page size = label size, 100% scale, and the right roll: step by step.
8 min read
How-to
How to generate unique barcode numbers for your products
When an internal Code 128 code is enough, when you need GS1-registered UPC or EAN numbers, and how to keep every barcode in your catalog unique.
8 min read
How-to
How to get GS1 barcodes (UPC/EAN) for your Shopify products
When marketplaces demand real GTINs: GS1 registration step by step, what it costs in 2026, the reseller trap, and how to get licensed numbers into Shopify and onto printed labels.
8 min read
How-to
How to print price tags from Shopify (with or without barcodes)
Price tags are labels with money on them: which formats fit jewelry, apparel and shelves, how to show sale prices with the original crossed out, and how to keep printed prices honest.
8 min read
Troubleshooting
Barcode labels won't scan: 6 fixes
Dead barcodes are a physical problem: work through size, quiet zone, contrast, print scaling, density and truncation — in the order most likely to fix yours.
7 min read
Reference
Avery label sizes for product barcodes: the complete chart
Every Avery format that makes sense for product barcode labels — exact dimensions, labels per sheet, laser/inkjet equivalents — plus which size fits which product, and the three that don't work.
8 min read
Reference
UPC vs EAN vs Code 128: which barcode does your store need?
The three barcode types Shopify merchants meet, decoded: what each encodes, where each is mandatory, what GS1 charges, and the one-question rule that picks the right type for your labels.
8 min read
Comparison
5 Retail Barcode Labels alternatives for Shopify (2026)
Shopify's free Retail Barcode Labels app sits at 2.2★ across 550+ reviews. Here are five alternatives compared on the things that actually break: alignment, previews, unique codes and pricing.
9 min read
Comparison
Solvi Barcode Labels vs Retail Barcode Labels: an honest comparison
Shopify's free label app against ours, feature by feature: previews, media presets, unique codes, pricing — including the cases where the free app is genuinely the right choice.
8 min read
Comparison
The 5 best Shopify barcode label apps in 2026, tested
Five barcode label apps compared on printing accuracy, media presets, unique-code generation and pricing — with transparent criteria, published test method, and the vendors' own listings linked.
10 min read