Reorder Reminder
An automated email asking a customer to buy a consumable product again before their supply is used up. Also called a replenishment reminder, replenishment email or repurchase reminder. In Reorder Reminder Pro, the reminder is timed from each customer's purchase date plus the usage days the merchant sets for that product.
Example A protein powder tub lasts about 30 days. The merchant sets its usage days to 27, so Reorder Reminder Pro sends each customer a reorder reminder 27 days after their purchase, about three days before a 30-day tub would be finished.
# Consumables (Shopify)
Physical products that are used up over time and need to be repurchased. Consumables suit repeat purchase automation because each product is used up over a fairly regular number of days.
Example Supplements, skincare serums, pet food, cleaning refills, candles, and coffee beans are all consumables. Custom one-off products (art prints, furniture) are not.
# Purchase Cycle
The time between a customer's initial purchase and their expected next purchase of the same consumable product. A merchant can estimate it as quantity purchased ÷ daily usage. Knowing the purchase cycle helps merchants decide what usage days to set for reorder reminders.
Example A 60-count bottle of probiotics taken once daily has a 60-day purchase cycle. A customer who buys on January 1 should receive a reorder reminder around day 57–58.
# Usage Days (per product)
The number of days a single unit of a consumable product typically lasts for one customer. Merchants configure usage days manually in Reorder Reminder Pro per product or variant. This is the core input that drives per-customer reminder scheduling.
Example A 250ml face wash used twice daily typically lasts 45 days. The merchant sets usage days = 45 for that product.
Calculate usage days for your products → # Repeat Purchase Automation
A system that automatically identifies past buyers of consumable products and sends them a timely prompt to repurchase — without the merchant needing to manually segment or schedule campaigns. Repeat purchase automation is distinct from subscription billing: customers are not locked into recurring charges.
Example Reorder Reminder Pro schedules a reminder email per customer based on their individual order date and the product's usage days. No subscription is required on the customer side.
# Batch Email / Batch Blast
Sending the same email to a large segment of customers at the same time, regardless of when each individual customer made their purchase. Batch blasting for reorder reminders is inaccurate: a customer who bought 3 days ago does not need a reminder at the same time as one who bought 27 days ago.
Example A weekly newsletter sent to all customers is a batch blast. A reminder sent exactly 27 days after each customer's individual order is per-customer automation.
# Auto Mode
An optional shortcut in Reorder Reminder Pro that applies one usage-days value to every product in the store. It only suits catalogs where every product has the same usage cycle; otherwise merchants set usage days per product (Manual Mode).
Example A skincare brand whose entire range is used in approximately 30 days sets Auto Mode to 28 days. Every customer gets a reminder 28 days after their order.
# Manual Mode
The standard configuration in Reorder Reminder Pro: merchants set usage days per product or variant. Products that last different lengths of time get different reminder dates — a 30-day supplement and a 90-day supplement are each reminded after their own usage days.
Example A pet supply brand sells flea treatment (30 days) and a 5kg bag of dog food (14 days). Manual Mode sends reminders at different intervals for each product.
# Per-Customer Timing
Scheduling a reorder reminder relative to each customer's individual purchase date, rather than a fixed calendar date or batch schedule. Per-customer timing ensures every reminder arrives when it is relevant to that specific customer.
Example Customer A buys on March 3; customer B buys on March 15. Both receive their reminder 27 days after their own order (March 30 and April 11 respectively), not on the same date.
# Shopify Reorder App
A Shopify app that automates the process of prompting customers to repurchase consumable products at the right time. A Shopify reorder app typically integrates with the store's order data to identify which customers are due for a reminder, then sends an email on the merchant's behalf.
Example Reorder Reminder Pro is a Shopify reorder app: the merchant sets usage days per product, and each customer's reminder is timed from their purchase date.
# AWS SES (Simple Email Service)
Amazon Web Services' transactional email sending infrastructure. Reorder Reminder Pro currently uses AWS SES to deliver reminder emails on behalf of merchants.
Example When a customer's reminder is scheduled and the send date arrives, Reorder Reminder Pro triggers an email dispatch via AWS SES.
# Shopify Cart Permalink / Checkout URL
A direct URL that adds one or more specific Shopify products to a customer's cart and takes them immediately to checkout. Cart permalinks are used in reorder reminder emails to reduce friction — the customer clicks and goes directly to a pre-filled checkout rather than navigating the store.
Example https://yourstore.myshopify.com/cart/12345:1 adds variant 12345 with quantity 1 to the cart and opens checkout directly.
# Repeat Purchase Rate
The percentage of customers who make more than one purchase from a store within a given time window. For consumables merchants, a healthy repeat purchase rate is the primary indicator of customer retention.
Example If 400 of 1,000 customers who bought in January also bought again within 90 days, the 90-day repeat purchase rate is 40%.
# Retention Email
An email sent to existing customers with the goal of encouraging a repeat purchase, preventing churn, or deepening the customer relationship. Reorder reminders are a category of retention email targeted specifically at consumable product replenishment.
Example A winback email sent 60 days after a customer's last purchase is a retention email. A reorder reminder sent 27 days after a protein powder purchase is a retention email focused on replenishment.
# Email Service Provider
A platform used for sending marketing and transactional emails at scale. General-purpose email marketing platforms like Klaviyo handle the full lifecycle of email marketing. Dedicated tools like Reorder Reminder Pro are purpose-built for a single workflow (reorder reminders) and do not replace a general email marketing platform.
Example Klaviyo is a full email marketing platform — merchants use it for welcome flows, abandoned cart, newsletters, and more. Reorder Reminder Pro is a single-purpose automation layer that handles only reorder reminders.
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