What are Shopify Apps and which ones are worth installing

Apps or plugins?

People coming from WordPress or other platforms search for "Shopify plugins", but on Shopify the official term is always app, and they do exactly the same thing: add functionality without changing the theme's base code.

The distinction is just naming; the Shopify App Store is the only place to install these extensions, there are no third-party plugins outside it.

How they work

A Shopify app connects to the store through the Shopify API, with permissions defined at install time: access to products, orders, or customers, depending on what the app needs.

Most run inside the store admin or inject scripts into the storefront; only storefront apps add weight to the page the customer sees.

The apps that usually earn their place

Messaging: Shopify Inbox is native and free, and covers customer chat without installing anything else. Only switch to a paid app if you need reply automation Inbox doesn't have; don't install a paid chat app before confirming what Inbox already covers.

Email marketing: Shopify Email is also native and covers newsletters and simple campaigns at no extra cost. It's only worth migrating to a dedicated app once you need more complex automation flows, such as multi-step sequences or fine segmentation, that the native tool doesn't support.

Abandoned cart recovery: Shopify already sends an abandoned-checkout email natively, no app required. Before paying for a dedicated app, confirm what's actually missing is multi-step automation: for most small stores, the native email already covers it.

Reviews and social proof: here the nuance runs the other way. Almost every reviews app loads its own script and pulls data from an external CDN on the storefront, which directly weighs down load time. It's only worth it if the product genuinely has a slow purchase decision that depends on visible social proof, not installed out of habit.

Checkout upsell/cross-sell: these depend on apps built specifically for checkout extensibility, Shopify's current way of customizing checkout. Not every generic upsell app can act there, worth confirming before installing.

Choosing without overloading the store

Every installed app is one more script to load, one more external dependency, and one more point of failure if the app gets discontinued.

Before installing, check whether the theme already covers the need, to avoid stacking apps for simple tasks that add load time for no reason.