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Hey everyone,

I’ve been experimenting with integrating small web-based tools into PrestaShop stores — specifically, things like price estimators, delivery fee calculators, or gratuity/tip calculators for service-based products.

The idea is to give customers quick, interactive insights before checkout without adding too much load on the backend.

Here’s what I’m trying to figure out:

Has anyone here integrated a custom calculation tool (like a cost or bonus estimator) inside a product or cart page?

What’s the best way to do this without slowing down the store — using a module, iframe, or API call?

Any gotchas to avoid when caching or updating the theme?

I’m testing it with a simple script hosted externally, and it works fine, but I’d love to hear how others handled similar integrations or performance challenges.

Appreciate any insights or examples you

all can share! 🙌