App Selection Principles
Before diving into recommendations: every app you install adds JavaScript to your storefront. Too many apps slow down your site (directly hurting SEO and conversion rate) and create billing overhead that adds up quickly.
Rules for a clean app stack:
- Every app must solve a specific, documented problem
- Uninstall apps you haven't used in 30 days
- Check Core Web Vitals after installing a new app — if LCP degrades, investigate
- Prefer apps that work at the server/liquid level over heavy client-side JavaScript apps
Conversion & Product Discovery
Shopify Search & Discovery (Free)
Native Shopify app. Replaces the default search with semantic search, synonym support, and product recommendations. Significantly improves zero-results rates. Install this before paying for a third-party search solution.
Judge.me – Product Reviews (Free / $15/month)
The most widely-adopted reviews app on Shopify. Photo reviews, review widgets on collection pages, automated post-purchase email sequences, and Google Review Rich Snippets. The free tier is sufficient for most stores under £1M revenue.
Frequently Bought Together (£9/month)
AI-powered product recommendations bundled together on product pages. One of the highest-ROI apps for AOV improvement. Simple setup, unobtrusive UI.
Inventory & Operations
Stocky (Free, included with Shopify POS)
Demand forecasting, purchase order creation, and reorder point management. If you're managing physical inventory and reordering from suppliers, Stocky replaces spreadsheets.
Inventory Planner (from $99/month)
For stores with 100+ SKUs and multiple suppliers. Forecasts demand by SKU, auto-generates purchase orders, and integrates with Amazon FBA inventory. Expensive but pays for itself if you're over-ordering or regularly stocking out.
ShipStation ($9–$159/month)
Multi-carrier shipping management. Connects to Shopify, Amazon, eBay, Walmart, and Etsy. Rate shopping across UPS, FedEx, USPS, Royal Mail, and DPD. Automated fulfillment rules (route orders to specific carriers by weight, destination, or SKU).
Customer Retention & Marketing
Klaviyo (Free up to 250 contacts, then from $20/month)
The industry-standard email and SMS platform for Shopify. Pre-built flows for abandoned cart, welcome series, post-purchase, win-back, and browse abandonment. Deep Shopify integration syncs purchase history for personalised segmentation. Required reading: set up your abandoned cart flow before anything else.
Smile.io – Loyalty & Rewards (Free / from $49/month)
Points-based loyalty program. Integrates with Klaviyo so you can email loyalty tier updates and rewards reminders. Measurably increases repeat purchase rate. The free tier covers most stores under £500K revenue.
Okendo – Reviews & Loyalty (from $19/month)
Alternative to Judge.me with stronger loyalty features, UGC management, and survey capabilities. Better choice if you need reviews + loyalty in one platform.
Subscriptions & Recurring Revenue
Recharge (from $99/month)
The most mature Shopify subscription app. Handles recurring billing, dunning management, customer portal for self-service pause/skip/cancel, and multi-currency. Industry standard for subscription brands.
Skio (from $299/month)
Recharge competitor with a cleaner customer portal and better dunning. Better choice for higher-AOV subscription products where churn cost is high.
Post-Purchase & Returns
Loop Returns (from $99/month)
Replaces email-based returns with a self-service portal. Customers initiate returns, choose exchange or refund, and print labels themselves. Reduces returns operations labour by 60–80% for stores with high return volumes.
AfterShip (Free / from $11/month)
Branded order tracking pages and proactive shipping notifications. Reduces "Where is my order?" support tickets by 40–60%. The branded tracking page is a second conversion opportunity — show product recommendations while customers wait for delivery.
Analytics & Testing
Triple Whale ($129–$499/month)
Post-iOS 14 attribution modelling for Shopify brands running paid social. More accurate than Meta/Google's own attribution. Essential if you're spending £5,000+/month on Facebook or Google ads and not trusting the reported ROAS.
Hotjar (Free / from £32/month)
Session recordings, heatmaps, and surveys. Shows exactly where buyers drop off on product pages and checkout. The free tier (35 sessions/day) is enough for meaningful insights for most stores under 10K monthly visitors.
Site Speed & Technical
TinyIMG – Image Optimiser (from $4/month)
Auto-compresses images uploaded to Shopify, adds alt text, and fixes broken image links. Set-and-forget image optimisation. Typically improves LCP score by 15–30%.
Hextom: Page Speed & Image Optimiser (Free / from $9.99/month)
Lazy loading, preloading of critical resources, and image compression. One of the most lightweight speed apps on the market.
App Stack by Store Stage
Under £500K revenue (keep it lean)
- Search & Discovery (free)
- Judge.me (free tier)
- Klaviyo (free until 250 contacts)
- AfterShip (free tier)
£500K–£2M (add retention and ops) Add: Smile.io, ShipStation, Loop Returns, Hotjar
£2M+ (full stack) Add: Inventory Planner, Triple Whale, Recharge or Skio, Okendo
Total monthly cost for the full stack: approximately £600–£1,200/month. Compare this against the incremental revenue from better retention, lower cart abandonment, and reduced ops labour.
eData4You configures and manages Shopify app stacks for scaling DTC brands. See Shopify services →