When the data changes

DiscountOS rewrites the data when something changes. The times below were measured on a test store on 28 September and 1 October 2026. They are typical times, not guarantees.

What happens	When the data follows	Measured
You create or edit a DiscountOS discount	Within seconds	About 10 seconds
A discount’s tags change: in Shopify’s discount editor, from the discount list, or through the Admin API	Within about 2 minutes	39 seconds for a tag added through the Admin API
A Shopify discount is edited through the Admin API (its value, dates, and so on)	Within seconds	17 seconds
A scheduled DiscountOS discount reaches its start time	Within a minute	19 seconds after the start
A DiscountOS discount reaches its end time	Within a minute	38 seconds after the end
A scheduled Shopify or other-app discount tagged dos:publish reaches its start time	Within about 2 minutes	Not measured (the 2-minute tag check picks it up)
You press Manual sync	Right away	A few seconds
Nothing changes for a while	An automatic check	At least every 2 hours

Tag changes

Shopify does not always tell apps when a discount’s tags change. A tag changed from Shopify’s discount list or through the Admin API sends no notice. So DiscountOS checks the tags of your active discounts every 2 minutes and updates the data when they changed. Sometimes Shopify does send a notice, and then the update comes sooner. Press Manual sync if you need it right away.

Scheduled discounts from Shopify or other apps

DiscountOS knows the start time of its own discounts and syncs right after it. For Shopify’s own discounts and other apps’ discounts it sees only discounts that are already active. The 2-minute tag check sees a tagged discount once it becomes active, so it appears within about 2 minutes of its start. Press Manual sync after the start if you need it right away.

While Live sync is paused

Nothing is updated. A discount that ends while paused stays in the data: in our test it was still there after its end time. Turning Live sync on again removed it on the first sync. Check sync_paused in your theme. See Turn it on and control it.

After removing and writing the data again

Removing the data and turning Live sync back on writes everything again. On the test store, with 21 discounts, removal took 12 seconds and the fresh write took 21 seconds. The result matched the data before the removal field for field. The only difference: each entry got a new metaobject ID. Its handle (discount-<id>) stayed the same.

Pages that stay open

A shopper who keeps a page open still sees the offers from when it loaded. For an offer with an end time, a small script can hide it when the time runs out.