Sell a product. The right fee, warranty, or gift attaches automatically.

Set a rule once. Tweakday auto-attaches fees, warranties, insurance, and free gifts to specific products at checkout. Per item. Silent. No code. No theme edits. All Shopify plans.

Start Free — No Credit Card

See How It Works

Free plan available — no credit card required · See pricing

Checkout cart with an Extended Warranty automatically attached to the gaming desktop

Customer adds 1 product

+ Warranty attached automatically

Fragile product in cart

+ Insurance attached automatically

Item priced over $500

+ Free gift attached automatically

Perishable product in cart

+ Handling fee attached automatically

Gift product in cart

+ Gift wrap attached automatically

Up and running in 3 minutes

Install from Shopify

One click from the Shopify App Store. No theme edits, no code required.

Pick a rule type

Choose from checkout add-ons, order protection, shipping control, or payment control.

Set conditions & go live

Use ready-made templates or build custom rules with AND/OR logic. Test in sandbox mode first, then activate.

Everything happens at checkout

Any product in your store becomes a checkout add-on. Set the condition, pick the product, done.

Fees, warranties & gifts — attached to the right product automatically

Set a condition. When a customer buys a fragile item, a handling fee attaches. Buy a phone, a warranty adds. Buy 2 phones, 2 warranties. Per item, not per order. Quantity scales 1:1 by default, or set your own ratio per add-on. Attach multiple add-ons to one product, and update the parent title and image so it looks like a bundle while fulfilling separately. No customer action needed.

Your rules. Your conditions.

Trigger add-ons by product tag, cart total, customer tag, item price, quantity, weight, discount code, and more. Combine conditions for precise control.

No product? We create it automatically.

Need to add shipping insurance or a warranty but don't have a product set up? Tweakday auto-creates a draft virtual product — never shows in your store, never requires fulfillment.

Not just for Shopify Plus.

Every competitor either requires Plus or touches your theme code. Tweakday runs purely on Shopify Functions — no theme edits, no code, works on Basic, Grow, Advanced, and Plus.

0+

Active Stores

5.0 ★

App Store Rating

Free

Plan to get started

Ready-made templates

11 ready-made templates for protection, fees, gifts and accessories. Install in one click — no setup from scratch.

View all templates →

Pro

Shipping Insurance

Auto-attach shipping insurance to fragile or high-value products. Customer buys, insurance attaches. You keep 100% of the fee.

Learn more →

Pro

Extended Warranty

Auto-add a warranty when eligible products are in the cart. High-margin revenue on every qualifying order.

Learn more →

Pro

Installation & Assembly Fee

Automatically recover installation costs at checkout. Fee attaches to the product, not the order.

Pro

Buy X Get Y

Customer buys a specific product — a free companion product auto-attaches at checkout. Silent. No customer action needed.

Pro

Cold Chain & Fragile Handling Fee

Auto-add a handling fee to perishable or fragile products. Recover specialist packaging and cold-chain costs on every order.

Pro

Free Gift on High-Value Product

When a product is priced above your threshold, a free gift attaches to it automatically. Make premium products feel more complete.

Pro

Gift Wrap

Auto-add gift wrap when gift or occasion products are in the cart. Easy, high-margin revenue and a premium unboxing experience.

Pro

Greeting Card

Attach a greeting card to gift orders automatically. Turns a regular purchase into a complete gift.

Pro

Product Accessory

Add the most relevant accessory the moment a product is in the cart: cases, cables, filters, care kits.

Start free. Upgrade when you're ready.

Common questions

Does it work on all Shopify plans? +

Yes. Order protection, shipping control, and payment method control work on every Shopify plan — free. Checkout add-ons (auto-adding warranties, fees, or free gifts) require the Pro plan.

What does the free plan actually include? +

The free plan gives you: block invalid pincodes, PO boxes, age-restricted products, and risky combinations (order protection); hide, rename, or reorder shipping methods; hide, rename, or reorder payment methods; plus access to all ready-made templates. No time limit.

Is there a free trial on the Pro plan? +

Yes — 7 days free, no credit card required. You can cancel any time during or after the trial and keep using the free plan.

Does it require theme edits or custom code? +

No. Tweakday runs entirely through Shopify's native Functions API. There is nothing to install in your theme and no code to write — ever.

Can I test a rule before it goes live? +

Yes. Every rule has a Testing mode — it only fires for a designated test email address, so you can verify behaviour in your real store before activating it for all customers.

5★ from every merchant

"Most developers were asking me to pay for Shopify Plus. Bharat was very helpful and instantly solved the issue."

HAWTHONS — UK

"We compared it with five other checkout rules apps, but either they did not work properly or they required payment even for the smallest tweak. Tweakday clearly stood out."

Ayoub, Kingspan — Belgium

"I had been looking for a simple checkout validation app...tried many, but they either didn't function well or required Shopify Plus accounts."

House of Habanero — UAE

"Very user-friendly app that absolutely fulfils its purpose. We highly recommend it."

Carrera — Austria

"Bharat has been great giving me support. Even went the extra mile and created a new feature aligned to my store's needs."

Proven Part — United States

Start recovering costs and adding revenue on every order.

Free plan included. No credit card. No code. No theme edits.

Install Free on Shopify