The best way for most Shopify stores to get a mobile app is a no-code app builder that installs from the Shopify App Store and syncs your products, stock and checkout automatically. Shopify stays your store and your source of truth, and the app sits on top of it. The real decision is price: these tools run from $99 a month to $2,850 a month, and some also take a slice of in-app sales. Prices are in US dollars, since that’s how Shopify bills apps (UK merchants pay the dollar price too, so check the £ figure on your Shopify invoice). diy for Shopify syncs your catalog, uses Shopify checkout and sends unlimited push notifications for a flat $99 a month, with a 30-day free trial.