Relentless Apps is a Shopify app developer with 3 apps on the Shopify App Store. It provides apps for Shopify merchants. Among the 15,394 Shopify brands over $5M that dtcmvp tracks, 476 (3.1%) run at least one of Relentless Apps's apps, #5 of 163 product variants apps by that count. Its share is highest among Pets (4.7%), Business & Industrial (4.5%) and Automotive (4%) brands. Its most reviewed app, Variant Option Product Options, is rated 4.6 out of 5 from 637 reviews on the Shopify App Store. All of its apps carry Shopify's Built for Shopify badge. Plans across its apps run from free to $19.99 a month on the Shopify App Store.
Overview
Relentless Apps makes Shopify apps for product options, size charts and a terms and conditions checkbox. They let a merchant add custom options, size guides and required agreement at checkout without building them into the theme. The company was founded by Jonathan Kruse and Martin Broder in California.
For Shopify brands
- Add product options such as buttons, swatches, text boxes, file uploads and checkboxes to product pages.
- Show size chart popups on product pages and connect each chart to many products.
- Require customers to tick an agree-to-terms checkbox on the cart before they check out.
How it works
A merchant installs each app from the Shopify App Store and sets it up in the app's dashboard. Each app has a knowledge base with setup help, and merchants can message the team for fixes such as options appearing twice on some themes.
- Built for
- Shopify merchants who want custom product options, size charts or a terms agreement checkbox on their store.
- Pricing
- All three apps have a free plan. Paid plans run from $2.99 to $19.99 a month: Variant Option Product Options $9.99 and $19.99, BF Size Chart & Size Guide $2.99 to $11.99, and the terms checkbox Premium at $4.99. Paid plans on two apps are free for development stores.
Products
- Variant Option Product Options Adds and styles product options, with conditional logic and price add-ons on the Advanced plan.
- BF Size Chart & Size Guide Creates size charts and size guides shown as popups on product pages.
- RA Terms and Conditions Checkbox Adds an I agree checkbox to the cart page and drawer cart that must be ticked to check out.
Buyer notes
- Price add-ons and conditional logic in Variant Option Product Options need the Advanced plan.
- Price add-ons use draft orders, which default to Shopify's General shipping rate.
- Ajax carts are off by default in Variant Option Product Options because they are not compatible with price add-ons, file uploads and the grid option.
- All three apps carry the Built for Shopify badge on the App Store.
From Relentless Apps's own site and Shopify App Store listings, as of 2026-10-30.
Among Shopify brands over $5M
Share of each sector's brands running it, where that beats the overall rate.
On the Shopify App Store
Variant Option Product Options
4.6 · 637 reviewsBuilt for ShopifyFree planPaid from $9.99/moOn 2.2% of brands over $5MLaunched 2017Product variantsShopify Product Options App for Shopify. Create variants options with infinite options.
Pricing
Starter PlanFree- Limited to 1 Product
- Unlimited Product Options
- buttons, image/ color swatches
- long and short text boxes
- +3 more
Basic Plan$9.99/monthor $99.99/year and save 17%- Unlimited Products
- Unlimited Product Options:
- buttons, image/ color swatches
- long and short text boxes
- +4 more
14-day free trialAdvanced$19.99/monthor $199.99/year and save 17%- Unlimited Products
- Unlimited Product Options
- Everything in the Basic Plan
- Conditional Logic
- +3 more
14-day free trialR Terms and Condition Checkbox
5.0 · 200 reviewsBuilt for ShopifyFree planPaid from $4.99/moOn 0.4% of brands over $5MLaunched 2023Cart customizationShopify Terms and Conditions app for Shopify, checkout rules, age verification. Add an I agree to terms and conditions checkbox on the cart page & drawer cart.
Pricing
FreeFree- Add a terms checkbox to the cart
- Checkbox required with checkout button
Premium$4.99/monthor $49.99/year and save 17%- Logs the consent date in order's details
- Supports Buy It Now buttons
- Supports Dynamic Checkout buttons
- Optional checkbox setting
- +2 more
14-day free trialBF Size Chart & Size Guide
4.7 · 137 reviewsBuilt for ShopifyFree planPaid from $2.99/moOn 0.5% of brands over $5MLaunched 2018Product comparisonShopify Size chart app for Shopify. Create size charts & size guides for all your products in your Shopify store.
Pricing
Basic PlanFree- 3 Free Size Charts
- Connect Charts to Unlimited Products
- Cm/ Inches Unit Conversion
- Fully Customizable Size Charts
- +3 more
Starter Plan$2.99/month- Everything in Basic Plus:
- Up to 10 size charts
- Cm/ Inches Unit Conversion
- Link placement next to size label
- +3 more
14-day free trialPremium Plan$5.99/monthor $59.99/year and save 17%- Everything in Starter Plus:
- Up to 100 size charts
- Cm/ Inches Unit Conversion
- *FREE for Development Stores
14-day free trialUnlimited Plan$11.99/monthor $119.99/year and save 17%- Everything in Premium Plus:
- Unlimited Size Charts
- Cm/ Inches Unit Conversion
- *FREE for Development Stores
14-day free trial
Ratings, reviews, plans, prices and descriptions as the Shopify App Store lists them. how we count.
Alternatives to Relentless Apps
The most used product variants apps among Shopify brands over $5M.
| App | Brands over $5M | App Store |
|---|---|---|
| Infinite Options · ShopPad Inc. | 4% | 4.7 · 2,624 |
| GLO Color Swatch Variant Image · Globo Options | 3.2% | 4.9 · 1,902 |
| SC Product Options · Shop Circle | 3% | 4.6 · 1,255 |
| Optionize Product Options · BasicApps | 2.5% | 4.4 · 94 |
| Ymq Product Options, Variants · YMQ | 2% | 5.0 · 425 |
| Globo Product Options, Variant · Globo Options | 1.8% | 4.9 · 5,184 |
Often used with Relentless Apps
What its brands run more often than Shopify brands over $5M do overall.
- Rubik Variant Images & Swatch12.8% of its brands · 32.3x average
- Upcharge Surcharge Fee Tariff14.1% of its brands · 17.6x average
- Aris Product Options, Variants14.3% of its brands · 15.4x average
- Magic Zoom Plus13.2% of its brands · 13.2x average
- Discount Ninja Promo Engine24.4% of its brands · 13.2x average
What Shopify apps does Relentless Apps make?
Relentless Apps has 3 apps on the Shopify App Store: Variant Option Product Options, R Terms and Condition Checkbox and BF Size Chart & Size Guide.
How many Shopify brands use Relentless Apps?
Among the 15,394 Shopify brands over $5M that dtcmvp tracks, 476 (3.1%) run at least one of Relentless Apps's apps, #5 of 163 product variants apps by that count. Its share is highest among Pets (4.7%), Business & Industrial (4.5%) and Automotive (4%) brands.
What are the alternatives to Relentless Apps?
The most used product variants apps among Shopify brands over $5M, after Relentless Apps: Infinite Options (4%), GLO Color Swatch Variant Image (3.2%), SC Product Options (3%), Optionize Product Options (2.5%), Ymq Product Options, Variants (2%) and Globo Product Options, Variant (1.8%).
What do Relentless Apps's brands use alongside it?
Of the brands running Relentless Apps, 12.8% also run Rubik Variant Images & Swatch, 14.1% also run Upcharge Surcharge Fee Tariff, 14.3% also run Aris Product Options, Variants, 13.2% also run Magic Zoom Plus and 24.4% also run Discount Ninja Promo Engine. Each is at least 13.2 times as common among them as across all brands over $5M.
How is Variant Option Product Options rated?
Variant Option Product Options is rated 4.6 out of 5 from 637 reviews on the Shopify App Store.
How much does Relentless Apps cost?
Plans across its apps run from free to $19.99 a month on the Shopify App Store. Variant Option Product Options: Starter Plan, Free; Basic Plan, $9.99/month; Advanced, $19.99/month.