Solution

Stop Building Reorder-Timing Flows by Hand

Building reorder timing by hand means a maze of per-product if/else branches in Klaviyo that's slow to maintain and still relies on generic intervals. reOtter collapses it to one flow: the engine decides who's due per customer and per SKU, fires the event into your channel, and your flow just sends.

The problem

Building reorder timing by hand means turning one clean idea — "remind people when they're about to run out" — into a maze of if/else branches. Real timing depends on the customer, the SKU, and the lifecycle stage, so doing it manually forces a branch for each product, each interval, and each edge case. The flow balloons into spaghetti that's fragile to edit, painful to QA, and slow to maintain.

And here's the cruel part: after all that work, it's still wrong. The branches just hardcode a handful of generic intervals — 30 days for this product, 45 for that one — applied to everyone who hits them. You've spent the engineering effort of personalization and ended up with the accuracy of a fixed clock. The team is buried in maintenance, and customers still get mistimed reminders.

Why the usual fix falls short

The instinct is to make the tree bigger: more branches, more product splits, more conditional intervals to cover the cases you're missing. But that scales the wrong thing. Every branch you add is another path to test, another rule to remember, and another place to break when a product or price changes.

It also can't reach true per-customer timing, because the inputs aren't in your flow builder. The branches can split by product or by a static interval, but they don't know how fast this customer actually goes through the product, or that the gap from a first order to a second differs from a fourth to a fifth. So the maze grows without getting more accurate — more maintenance burden, same generic timing underneath. Manual branching is the wrong tool for a prediction problem.

How reOtter solves it

reOtter moves the timing logic out of your flow and into the engine. It predicts who's due — per customer, per SKU, per lifecycle stage — and fires a reorder event into your existing channel at the right moment. Your flow stops being a decision tree and becomes one simple listener: it waits for the event and sends. The engine decides; the flow delivers.

That event drops the customer onto a dynamic reorder storefront — a personalized one-click reorder page with their products pre-loaded and any rules-based discount already applied. The send itself goes out through your existing Klaviyo, Attentive, Postscript, or Omnisend under your own logo. reOtter doesn't replace your stack or send its own messages; it supplies the timing and the storefront so your one flow can do the rest.

You also keep control of the timing. reOtter shows a suggested cadence per variant and lifecycle stage, and you can override any of it — smart defaults on day one, adjustments whenever you want. The merchant owns the timing; the AI does the math. For agencies, that means one reOtter-driven flow per brand instead of a bespoke timing tree to build and babysit for every client.

What changes

Before: a sprawling per-product flow full of if/else branches, slow to maintain, that still fires generic intervals at everyone — high effort, low accuracy.

After: one triggered flow that listens for reOtter's reorder events and sends. The engine handles per-customer, per-SKU timing; customers land on a one-click reorder storefront through your own channels and branding. Your team stops maintaining branch spaghetti, agencies stop rebuilding it per client, and the timing is finally personalized instead of hardcoded.

See it in action → Join the waitlist

Frequently asked questions

Why is building reorder timing by hand so hard in Klaviyo?
Because real timing depends on the customer, the SKU, and the lifecycle stage — so doing it manually means a branch per product and per scenario. The flow grows into if/else spaghetti that's fragile to edit and slow to maintain, yet still relies on a few hardcoded intervals underneath.
How does reOtter replace branch spaghetti?
reOtter moves the timing logic out of your flow and into the engine. It decides who's due per customer and per SKU, then fires a reorder event into your channel. Your flow becomes one simple branch that listens for the event and sends — no per-product trees to build or maintain.
Do I have to rebuild my existing flows?
No. reOtter fires events into your existing Klaviyo, Attentive, Postscript, or Omnisend under your own logo — it doesn't replace your stack or send its own messages. You add a single triggered flow that listens for reOtter's reorder events; your other flows stay exactly as they are.
Is this useful for agencies managing many brands?
Yes. Instead of hand-building and maintaining bespoke timing trees per client, an agency adds one reOtter-driven flow per brand and lets the engine handle per-customer, per-SKU timing. Less build time, fewer brittle branches, and consistent reorder timing across the whole client roster.
Does one flow mean every customer gets the same timing?
No — the opposite. One flow handles the sending; reOtter decides the timing individually. The engine predicts each customer's run-out per SKU and per lifecycle stage and fires only when they're due, so a single flow delivers fully personalized timing without any per-product branching.

Keep exploring

Retention

The 80/20 of Retention Flows

37% of email revenue comes from just 2-3% of sends. Here's which retention automations actually move the needle for replenishable brands — and which ones you can stop obsessing over.

Lifecycle

Replenishment Automation

Replenishment automation is the use of software to detect when a customer is due to run out of a consumable and automatically send a timed reorder prompt. It turns a manual, easily-forgotten task into a consistent, per-customer revenue engine.

Replenishment

Consumption-Based Timing

Consumption-based timing schedules a reorder prompt around how fast an individual customer actually uses a product, not a one-size-fits-all interval. Someone who finishes a bag of coffee in 18 days and someone who takes 40 each get prompted on their own cycle — raising relevance and conversion while cutting message fatigue.

Lifecycle

Reorder Reminder

A reorder reminder is an automated message nudging a customer to rebuy a consumable as they near running out. The most effective ones are timed to each customer's consumption rate rather than a fixed calendar, and link to a pre-filled one-click reorder instead of a generic product page.

Triggers & Reorder Moments

How to Set Up Reorder Reminders on Shopify

Reorder reminders work best when you time the prompt to each customer's consumption cycle and send them to a one-click reorder storefront instead of a generic product page.

Agency

reOtter for Agencies: Replenishment Across Your Client Roster

A transparent, white-label replenishment engine agencies can run across multiple Shopify clients — fires into each client's own Klaviyo under their brand, with editable timing the agency controls.