StoreTwin copies products and stock one way, from the store that owns the catalogue to the store that sells it, and then keeps checking that the two really match - product by product, field by field.
Installation runs through the Shopify App Store, so permissions and billing stay inside Shopify where you can see and revoke them.
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Changes arrive in secondsstock, variants, fields and your own metafields
Checked every hourand the whole catalogue compared once a day
Every difference namedwhich product, which field, what each store says
Nothing is ever deletedand nothing copied until you approve it twice - the one field replaced rather than kept is the tag set
Sync is easy on day one and quietly wrong on day ninety: a webhook is missed, a variant is renamed, an edit lands in the wrong store. Every hour StoreTwin re-checks what changed, and once a day it compares both catalogues in full and names each difference.
A product, variant, image or metafield that exists only in the receiving store is reported and left alone. The store that owns the catalogue is never modified at all: the sync goes one way by design, and there is no code in the app that deletes anything. One field is replaced rather than merged - tags travel as a complete set, so a tag added only in the receiving store is removed by the next repair.
A new connection starts read-only. You see what matched, what would be created and what needs a human decision, and only then allow changes in the receiving store and start syncing. Stop it at any time - everything already copied stays as it is.
What sync apps can and cannot do - the same boundary applies to every app on this platform, ours included.
How to sync two Shopify stores, one-way against two-way and where catalogue drift comes from.
Why webhooks alone are not enough - the delivery guarantee every sync app silently depends on.
Going into the peak weekend: what a bulk-edit mistake costs on your own numbers, and the handoff checklist if an agency is giving the store back before it.
The sync audit - every difference named by product and field, on a schedule.
Verifying a sync you already run - the free audit reads any catalogue, including one another app is syncing.
Keeping an expansion store in step, and why duplicates appear when stores are synced carelessly.
Syncio and Easify - by the work each does, with every figure dated.
What to check before trusting a sync app - five questions answered badly until you ask them.
Should a sync app copy prices? - a price is a decision, not a fact that travels with the product.
Our pricing - one number decides the plan, source stores are always free.
A free month for a conversation - a review is not required, not implied and not checked.