About Ultimate Gainz

Ultimate Gainz is a performance-focused eCommerce brand that constantly looks for ways to improve revenue efficiency while protecting the customer experience.

After validating pricing changes with TestSignal, the team turned to another critical — and often overlooked — lever at checkout: shipping rates.

The Big Question

Shipping is the final step before purchase — and often the point where customers drop off.

Ultimate Gainz had one big question:

Is shipping optimized — or just inherited? To get real insights from real shoppers, Ultimate Gainz turned to TestSignal’s Shipping Testing.

The Challenge

Shipping cost is often the final decision point before purchase. Even small changes at this stage can significantly impact conversion and revenue.

Ultimate Gainz wanted to understand:

• Shipping is the last step before checkout completion

• Customer sensitivity to shipping price was unknown

• A higher rate could increase revenue — or cause drop-offs

They needed a data-backed answer — fast.

Experiment Setup

• Experiment Type: Price A/B Test

• Shipping Rates Tested:

  • Control shipping rate: €4.95

  • Variant A: €5.00

  • Variant B: €4.50

• Traffic split: Even across all variants

• Duration: Oct 03, 2025 — Oct 04, 2025

• Timezone: Europe/Madrid

High-Level Results

Key Insights from the Data

The experiment showed that customers were highly sensitive to small changes in shipping price.

• A slightly lower shipping rate (€4.50) led to:

  • Higher checkout completion

  • More total orders

  • Stronger overall revenue performance

• Increasing shipping to €5.00:

  • Raised shipping revenue per order

  • But reduced conversion and total purchases

• The control rate (€4.95) performed consistently, but failed to maximize revenue

The data made it clear: revenue was driven more by completed checkouts than by higher shipping fees.

Final Outcome

Based on the results, Ultimate Gainz confidently rolled out €4.50 as the new standard shipping rate.

• Total revenue increased without harming conversion

• Checkout drop-offs remained stable

• The change required no product discounts or UX changes

By relying on TestSignal’s shipping experimentation, Ultimate Gainz turned a small checkout adjustment into a measurable revenue win.