Shopify Design, Development & CRO Agency

It depends on the same complexity that sets the cost. A build on an existing theme moves fastest, typically six weeks. 

Custom sections on an existing theme add one to two weeks, and a custom theme built from the ground up or a migration typically takes three to four months.

Any timeline is agreed before work starts and written into the project plan.

Both. Many builds start from a proven Online Store 2.0 theme and are customized to fit the brand. Where a theme doesn't fit how you sell, we build custom sections and functionality on top of it, or design and build a custom theme from the ground up. 

We also have built our own custom apps to serve bespoke functions for websites like bundle builders and gift-with-purchase. 

Yes. We migrate brands to Shopify from Magento (Adobe Commerce), BigCommerce, WooCommerce, Salesforce Commerce Cloud and custom-built platforms. Products, customers, order history, URLs and integrations are mapped before anything moves, redirects protect search rankings, and everything is checked against the source before launch.

Yes, and that's the point. You get a fully capable theme your team runs from Shopify's theme settings: content, layouts, colors, images and sections are all editable without touching code. You own everything, and nothing is siloed in code that only a developer can change.

That holds for anything we add later. A new section or a ground-up redesign is built with the same editable settings, so the site stays in your team's hands.

CRO starts with where shoppers drop off. We review analytics, session recordings, product pages, collections and the cart, then rank ideas by their likely revenue impact. Each idea becomes a split test with a written hypothesis and a success metric, judged on revenue per visitor rather than clicks alone, since a change that lifts conversion but lowers order value isn't a win.

Winning variants are built into the theme, and every result is logged so tests aren't repeated. Over time, that log becomes a record of what actually works for your customers.

Some gains show at launch: a faster, cleaner site and fixes to known friction points in the product page, cart and checkout path start working on day one. Testing gains come after, as each split test needs enough traffic to reach a clear answer, so results build month over month once the testing program is running.

Yes. Zettler Digital also runs Klaviyo email and SMS and Meta and Google Ads, with dedicated specialists for each. Because the site, retention and paid media can sit with one agency, signup forms, tracking and landing pages are built with those channels in mind from the start, instead of being handed between agencies.