01Mobile speed
Why it mattersMost e-commerce visits happen on mobile phones. A slow theme turns visitors away before the page even displays.
How to verifyTest a theme demo store on PageSpeed Insights in mobile mode. Check Google's 3 Core Web Vitals: Largest Contentful Paint (LCP) under 2.5 seconds, responsiveness (INP) under 200 milliseconds, and visual stability (CLS) under 0.1.
With Speedfly During our Lighthouse audit on October 5, 2026, the Glow demo store scored 95 on desktop and 100 in SEO. Each page only loads what it actually uses.
02Native features vs. apps
Why it mattersEvery app adds a subscription and extra code that slows your store down. A good theme builds in everything you need to sell.
How to verifyList the apps you currently pay for or plan to install (reviews, upsells, shipping bar, popups, wishlists) and check if the theme replaces them natively.
With Speedfly 111 native features, including 11 that replace around €202 in app subscriptions per month.
03Updates
Why it mattersShopify evolves constantly. A theme that is no longer updated will eventually break or miss out on new features.
How to verifyAsk how often updates come out, whether they are included in the price, and how they are installed without losing your settings.
With Speedfly Continuous updates, included in the subscription, installed through the SpeedFly One app.
04The license: how many stores?
Why it mattersIf you launch multiple stores, the real cost depends on the number of licenses you need, not just the sticker price.
How to verifyRead the licensing terms: 1 store, 3 stores, unlimited? And check what happens if you cancel the subscription.
With Speedfly With the Pioneer offer, until December 31, 2026, a single subscription covers all stores owned by the same account holder, as long as it remains active.
05Support and language
Why it mattersThe day something gets stuck, the quality of support matters more than any single feature.
How to verifyAsk support a question before buying. Check the response time, the clarity of the answer, and the language.
With Speedfly Support in French by the Speed Ecom team, with tutorials for every setting.
06Demos that match your niche
Why it mattersA fashion demo does not help you envision a pet store. The closer the demo is to your project, the less work you have to do.
How to verifyFind a demo in your niche and browse it on your phone: homepage, product page, cart.
With Speedfly 12 complete styles, one per niche, to test directly on the website with your brand name.
07Layout flexibility
Why it mattersYour store will evolve. The theme should let you design your pages without needing a developer.
How to verifyOpen the demo editor: how many sections and blocks are available, and can you rearrange them freely?
With Speedfly 41 sections and 116 modular blocks, fully customizable in the Shopify editor without code.
08AI: useful or a gimmick?
Why it mattersAI tools that build stores are multiplying fast. Some quickly draft a page; others assemble a real, functional store.
How to verifyCheck which theme the AI builds on, whether the theme stays updated afterward, and whether you can review all your pages before installing. Note: Shopify Canvas does not support third-party themes (Shopify Help, October 2026).
With Speedfly The Speedfly Studio: one prompt, 7 branded pages on desktop and mobile, free with no sign-up required.
09Total cost over one year
Why it mattersThe real cost is the theme plus the apps it does not replace, plus the time you spend managing them.
How to verifyAdd up the theme price over 12 months and the apps you will still need to pay for. Then compare.
With Speedfly €197 per year, or €27 per month, with a 14-day free trial with no immediate charge.
Free theme, premium theme, or AI builder?
| - | Shopify free theme | Premium theme | AI builder |
|---|
| Price | Free | Subscription or one-time purchase | Variable, usually monthly |
|---|
| Sales features | The basics | Extensive, built-in | Depends on the tool |
|---|
| Apps to add | Many | Few | Depends on the theme used |
|---|
| Updates | By Shopify | By the theme developer | Depends on the tool |
|---|
| Best for | Testing an idea | Selling seriously | Moving quickly on a first draft |
|---|
The pre-purchase checklist
- I tested a demo on my phone
- Google's 3 Core Web Vitals are green on the demo
- The theme replaces the apps I planned to pay for
- I know how many stores the license covers
- Updates are included
- I asked support a question
- I calculated the total cost over 12 months
What is the best Shopify theme?
The one that checks all 9 criteria for your specific project. For a first store, prioritize speed, native features, and support you can easily communicate with. Always test the theme on your own store during the free trial.
Is a free theme enough to start?
To test an idea, yes. As soon as you invest in advertising or content, a premium theme pays for itself through higher conversion rates and fewer app subscriptions.
Can you change themes without losing everything?
Yes. Your products, collections, and orders remain safe in Shopify. The new theme installs alongside the current one, allowing you to configure it and publish only when you are ready.
Speedfly vs Fullstack → Speedfly vs Shopify Canvas → The 111 features →
