Free tool · No signup

Stop guessing your bundle discount.

Should you offer 20% off, or will that just eat the margin? Enter a product pair’s confidence and lift and the calculator shows which strategy earns more: a discounted bundle, a full-price cross-sell, or leaving the products apart.

Runs in your browser · Nothing uploaded

Calculator

Bundle Strategy Calculator

Input your product data to simulate profitability.

A

Anchor Product

$
$
units
B

Add-on Product

$
$
units
Scenarios

Three Scenarios, One Right Answer

Without knowing your exact Lift & Confidence, any discount is a guess. See how the data shifts the outcome:

Best Case

Hidden Synergy

Products with strong synergy (Lift 3.0×) but low organic overlap: customers want both but rarely discover the pairing on their own.

Projected Uplift

+$733/mo

Optimal discount: 8% Off

Most Common

The Margin Trap

Products that seem popular together (Conf. 25%) but have only average synergy (Lift 1.6×). The discount eats more margin than it creates.

Fragile Profit

L:1.6× / C:25%

+$0/mo

If Lift drops to 1.3, profit turns negative. Do you know your exact number?

Substitutes

Products that compete with each other (e.g. Vanilla vs Chocolate). Bundling forces a hard choice.

Outcome

Conversion drops because customers feel forced into a compromise.

Do not bundle these products.

Which scenario are you actually in?

Affinsy runs Market Basket Analysis on your real transaction data to calculate your exact Lift & Confidence for every product pair, so you never have to guess. Upload a CSV or connect your Shopify store in 30 seconds.

Reveal My Metrics
01 · The two numbers

Profitability hides in lift and confidence.

01 · Lift
The synergy score

How much more often two products are bought together than random chance would predict.

  • Above 1.0: positive synergy, the products sell each other
  • Below 1.0: competition, the products replace each other
02 · Confidence
The habit score

The share of buyers of product A who also bought product B in the same order.

  • High (over 30%): a strong organic habit, do not discount it
  • Low (under 10%): a weak connection that needs a nudge
02 · Three rules

Read the pair, pick the play.

High lift · Low confidence
Opportunity
Hidden synergy

Customers love these together but rarely find them. This is the pair to bundle: a discount buys discovery, not cannibalised margin.

Action: Bundle and discount
Any lift · High confidence
Margin leak
Organic habit

They already buy both. A discount here is a donation to the customer. Cross-sell at full price with a simple prompt in cart.

Action: Cross-sell at full price
Low lift · Any confidence
Risk
False friends

These products compete for the same need, like two flavours of the same thing. Forcing a choice in one offer kills conversion.

Action: Keep separate
03 · Free for 7 days
Affinsy report, products table: one row per product with its job glyphs, revenue, buyers, the share of first-time buyers back by month 1, 3, 6 and 12 against all products, reorder cycle, repeat rate and overdue buyers
Product lineage
Before · with · after
one graph per product, in the trial

The calculator shows one pair. The trial shows the whole pattern.

Affinsy is free for 7 days. Upload the same export inside the app and every product gets a lineage: what customers buy before it, what lands in the same basket, and what they come back for afterwards. Step deeper, raise the lift floor, click any product to move the view there. That is how you find the pattern, not just the pair.

  • Every association rule, not just the top pair
  • Every product's job: what it opens, what brings customers back, what to bundle
  • Customer segments with counts, revenue share, and exportable lists
  • A ranked test backlog: which bundle, cross-sell, or campaign to try first

7 days free · Cancel anytime · First report in minutes