
Checkout - OtherBy byKlemmLaunched June 8, 2026Updated June 8, 2026
PO Validator B2B launched on June 8, 2026. Shoplist is watching for its first storefront installs and tracking pricing in the meantime.
Apps merchants weigh against PO Validator B2B, with their own detected stores and ratings.
Get alerted on first storefront installs, review spikes, pricing changes, and listing edits.
Blocks checkout without a valid PO number. Prevent invalid B2B orders before they reach your team.
B2B merchants must attach a Purchase Order number to every order, but Shopify provides no native way to enforce this. Buyers skip the PO field or enter invalid data, causing fulfillment delays and ERP mismatches. PO Validator solves this with server-side validation via Shopify Functions. Buyers cannot complete checkout without a valid PO number. Configure rules: required field, min/max length, mandatory prefix, regex patterns, allowed characters, and multilingual error messages.
Every number on this page comes from public storefront scans and the public Shopify App Store listing. If Shoplist shows PO Validator B2B on a store, it is there.
Read the data methodologyCompare
Detected stores, ratings, pricing, and momentum side by side.
Developer
Every app byKlemm publishes, with their detected reach.
Rankings
The ten apps gaining the most detected installs in each category.
Directory
Browse every app Shoplist tracks, by category, rating, and reach.