You can’t set up an complete online store on Shopify Starter, but you can create individual product pages linked to a checkout. This is great for selling on social media or messages, where you just link to products to sell them online.
Basic Shopify is the least expensive option with full online store capability, 24/7 phone support and an online card processing rate of 2% + 25p for UK-issued cards or 3.1% for Amex or other international card payments. The Shopify package throws in professional reports for better analytics, allows more shop locations, more user accounts and a lower online transaction rate of 1.7% + 25p for domestic cards or 2.7% + 25p for foreign cards.
The pricier Advanced Shopify includes custom report creation tools, customer analytics, real-time calculated carrier shipping, up to 15 staff and the lowest possible rate of 1.5% + 25p per domestic card transaction or 2.5% + 25p per international card transaction online.
If you have a high turnover, the lowered processing rates with Shopify and Advanced Shopify might be worth the extra cost alone.
All of these plans let you download the Shopify POS app and use the free Shopify POS Lite features. But to access all POS features, you need to subscribe to Shopify POS Pro for $89 USD + VAT/month per location.