Our methodology
WhichAppBuilder is built by a team that has spent years in the ecommerce and mobile commerce industry, helping online stores launch and grow mobile apps. We dig into how ecommerce app builders actually work — the technology under the hood, real pricing, integration counts, and hands-on flexibility — then score them consistently so you can compare like for like.
The WAP Score
Every builder gets a WAP Score — our proprietary 0–10 rating that powers the rankings across the site. Instead of one reviewer's opinion, it blends the factors that actually predict whether a tool will serve a growing store well:
- Longevity — how long the tool, and the company behind it, have been operating.
- Reviews — the weight of independent customer ratings across the app stores and review platforms.
- Service — how the app is delivered and supported, from pure self-serve to fully managed.
- Flexibility & functionality — how capable the product is: the kind of app it builds and how deeply it works with the rest of your stack.
We keep the exact formula proprietary, but it's applied identically to every tool so you can compare like for like. Basic transparency counts too — a builder that won't name a single customer or say when it was founded scores lower for it.
Where our data comes from
We combine our editorial testing with public review data from sources like the Shopify App Store, G2, Capterra and Trustpilot. Pricing always comes from each builder's own pricing page, and review figures are dated so you can see how fresh they are.
Why trust us
We know this space from the inside. Years of working in ecommerce and mobile commerce — building, shipping and supporting apps for online stores — taught us what makes a mobile app convert, what breaks at scale, and which technical trade-offs actually matter. That experience is what the WAP Score is built on.