S Estimated Delivery Date Plus
S Estimated Delivery Date Plus is Synctrack's delivery date app, on the App Store since 2018 and Built for Shopify. The free plan is generous on traffic (unlimited ETA views) but limited on logic (three estimate rules), and the paid tiers add SKU, inventory-location and market rules, carrier-based exact delivery dates and, on Premium, a checkout extension with dynamic ETAs for Shopify Plus stores.
It also bundles a shipping protection quota on every plan, which is useful if you want both features from one vendor and irrelevant if you don't.
Strengths:
Unlimited ETA views on the free plan
Rules by product, collection, vendor, SKU, inventory location and market
Exact delivery dates via carrier integration on the PRO plan
Checkout extension and thank-you page ETA banner for Shopify Plus on Premium
Public API for custom builds
Worth knowing:
Cut-off times, workdays and blackout dates start on the $4.99 STANDARD plan, not the free one. Geolocation and full translations need PRO ($9.99/month).
Price
Free (3 rules, unlimited views). STANDARD is $4.99/month (10 rules, cut-off and blackout dates). PRO is $9.99/month (unlimited rules, geolocation, carrier dates). Premium is $18.99/month (Shopify Plus checkout extension). 7-day free trial on paid plans.
Shopify rating
4.9 out of 5 (450 reviews), Built for Shopify.