OptionKit

Name: OptionKit
Brand: FourCore
Rating: 5.0 (2 reviews)

Pricing: Free plan available
Rating: 5.0 (2)
Developer: FourCore

Install

Custom product options and paid add-ons for any product

Add product options and paid add-ons to any product. Upgrades are priced at checkout automatically.

OptionKit lets you add option fields to your products so customers can personalize what they buy. Build text fields, dropdowns, checkboxes, color and image swatches, file uploads, and date pickers, then group them into reusable option sets assigned to products or collections. Premium options can add an upcharge — fixed, percentage, or per-character — carried through to the cart and checkout. Conditional logic shows or hides options, with per-language translations and per-market localization.

20+ option types including text, dropdowns, swatches, file upload, and date
Premium options can add an upcharge: fixed, percentage, or per-character
Conditional logic to show or hide options based on earlier choices
Translate options per language and localize them for every market
Theme-matched widget with cart editing so shoppers can change options

Languages

English

Works with

Checkout
Shopify Admin

$14.99 / month

or $149/year and save 17%

Features

Unlimited option sets
20+ option field types
Conditional logic
Add-on pricing
Per-market pricing
Per-language translations
Priority support

All charges are billed in USD. Recurring and usage-based charges are billed every 30 days.

Reviews (2)

Overall rating

Counts per rating level

100% of ratings are 5 stars
2
0% of ratings are 4 stars
0% of ratings are 3 stars
0% of ratings are 2 stars
0% of ratings are 1 stars

All reviews

June 28, 2026

Very much love that this app has an in-app messenger where I was able to connect with someone with something I was technically challenged on. Wonderful assistance and customer service. This app has been very lucrative for our business in particular for setting up product-specific customizations for shoppers. I love that there are multiple options for assigning various traits for our products that make the customer experience much better! Very smooth and makes our shop top-tier. Recommend this app and its easiness to set up and explanations!

Weeping Willow Works

United States

2 days using the app

July 2, 2026

I would like to start by saying customer service was superb! Answered all questions that I had, and responded in a timely manner. I was also able to get the layout I was looking for. Enjoying the app so far :)

ZenZaray

United States

About 1 hour using the app