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Step-by-step guides for Freebies Engine and Experiment Engine, written against the screens you use. Search, or browse by topic.

Gifts, bundles, upsells, discounts and codes for your Shopify store, with checks at checkout.

Install the app, turn on the app embed, create your first offer and publish it.

One guide for each kind of offer: gifts, bundles, upsells, discounts, codes, shipping, subscriptions and boosters.

Add upsells inside checkout, which needs Shopify Plus, and on the order confirmation page.

Read revenue and orders by offer, and know exactly what each number counts.

Plans, the free trial, limits, and what happens when a plan changes.

Invite people and decide who can change offers, settings and billing.

Move offers in and out with a CSV or an offers file.

Offers not showing, discounts not applied, the app embed, limits and Diagnostics.

Experiment Engine

A/B tests on prices, discounts, shipping, content and offers, compared by profit.

Install, turn on the app embed and tracking, and add product costs.

Plan a test, then set up page content, two-page, discount, shipping and offer tests.

Chance to win, likely range, guardrails and the traffic split check.

Pause a test, end it and ship the winning version.

Running test limits and what each plan adds.

Tests that will not launch and numbers that look wrong.