Best Shopify Apps for Pet Supply Stores 2026: The Verified Stack

Short answer: pet retail runs on repeat orders and on getting the size and flavour right the first time. Put food on subscription, then fix the product page with Rubik Variant Images, built by Craftshift, which assigns a separate image set to every flavour and bag size. Free plan available, 5.0 stars across 410 reviews.

Pet supplies is a deceptively awkward category to run on Shopify. On paper it looks simple: bags of food, collars, beds, toys. In practice almost every product stacks two or three option types, and the wrong combination shows up on the page constantly. One grain-free formula might exist in six flavours and four bag sizes. That is 24 variants on one product, each with its own bag photo, plus a kibble shot, an ingredients panel and a feeding chart shared across all of them.

And the customer here is unusually unforgiving, because the buyer is not the user. A dog that will not eat the salmon formula is a return, a refund and a customer who never comes back. Walking gear is worse. Get the fit wrong and it goes back, every time, no exceptions.

Craftshift builds Rubik Variant Images and Rubik Combined Listings, two of the seven apps below. Seven different app categories means there is no single App Store ranking to relay, so we ordered them by what moves revenue in this vertical, which puts a subscription app above both of ours. Ours are flagged as ours every time, inside the ranked list and the comparison table rather than a section of their own, and we say where a competitor beats us. Appstle has 7,986 reviews against our 63. Every figure came off the App Store listing on 29 July 2026.

One number before the list. Six flavours in four bag sizes is 24 variants on a single product, and doing those image assignments by hand is a morning’s work you repeat every time a formula changes. That is the point where filtering the gallery to the flavour and size the shopper actually picked stops being cosmetic. Check your own count with the free variant calculator.

In this post

• The seven apps compared
• 1. Appstle Subscriptions
• 2. Rubik Variant Images (ours)
• 3. Kiwi Size Chart & Recommender
• 4. Kaching Bundles & Upsells
• 5. Rubik Combined Listings (ours)
• 6. Smile: Loyalty Program Rewards
• 7. Preorder, Back In Stock (STOQ)
• How to choose
• FAQ
• Related reading

The seven apps compared

Ratings, review counts and pricing verified on the Shopify App Store, 29 July 2026.

App	What it solves	Rating	Reviews	Pricing
Appstle Subscriptions	Recurring food and litter deliveries	5.0	7,986	Free plan available
Rubik Variant Images (ours)	Gallery shows only the chosen flavour and size	5.0	410	Free plan, then $25/mo
Kiwi Size Chart & Recommender	Collar and coat fit, from real measurements	4.8	1,085	Free plan available
Kaching Bundles & Upsells	Variety packs and new-puppy starter kits	5.0	4,964	Free to install
Rubik Combined Listings (ours)	Flavours as separate products, shown as one listing	5.0	63	Free plan, then $10/mo
Smile: Loyalty Program Rewards	Points and referrals on a predictable reorder cycle	4.9	4,150	Free plan available
Preorder, Back In Stock (STOQ)	Waitlists for out-of-stock formulas	5.0	3,424	Free plan available

1. Appstle Subscriptions: the business model, not a feature

What it does. Turns products into recurring purchases with replenishment schedules, build-a-box, curation models and a customer portal for skipping or swapping deliveries.

Why pet supplies specifically. No other category has consumption this predictable. A 12kg bag lasts a medium dog roughly a month. Litter runs out on a schedule. Flea treatment is monthly by design. Sell those one bag at a time and you are re-acquiring the same customer twelve times a year, paying for it every time.

The detail that matters is the swap. Pets change food, outgrow puppy formula, develop sensitivities. A subscription a customer cannot edit is one they cancel, so the portal that lets them switch flavour or push a delivery back two weeks does more retention work than any discount attached to it. Price that discount against what a retained pet customer is worth using the free customer lifetime value calculator.

5.0 stars across 7,986 reviews, the largest review base on this list, with a free plan and paid tiers from $10 a month. No honest complaint to make about it, so we will not invent one.

2. Rubik Variant Images (ours): the flavour they picked, not all six

What it does. Shopify allows exactly one featured image per variant. Rubik Variant Images assigns a whole image set to each variant through metafields, so choosing Salmon shows the salmon bag, the salmon kibble shot and the salmon feeding guide, and nothing from the chicken range. It also turns the picker into image swatches, colour swatches or pill buttons.

Why pet supplies specifically. Two option types is the norm here, which is exactly where galleries fall apart. Six flavours in four bag sizes is 24 variants. Three photos per flavour puts 18 images on the page, and the shopper after the 12kg salmon bag has to pick it out of a wall of near-identical packaging. Every flavour in a range uses the same design with a different colour band. Nobody spots that at thumbnail size.

Shared images solve the other half. The ingredients panel, feeding chart and lifestyle shot are identical across all 24 variants, so you assign them once instead of uploading them 24 times and hitting the 250 image per product ceiling. Our guide to multiple images per variant covers the setup, and there is a fuller walkthrough for products with more than one option type.

And while we are here: why does Shopify still cap you at one image per variant in 2026? Every app in this category, ours included, exists because of that one product decision.

Where it is the wrong pick. A store selling toys, beds and single-SKU accessories with one photo each gets nothing from this. It earns its keep on food, treats and anything with flavour or size options. On review count we are well behind Appstle and Kaching: 410 at 5.0 stars. Pricing is flat and ignores your Shopify plan: free for 1 product, then $25/month for 100, $50 for 1,000, $75 for unlimited.

“This app makes it super easy to manage images for products that have multiple variations (size and flavor in my case). The support is great as well!”

Anonymous merchant, February 2026, Rubik Variant Images on the Shopify App Store

3. Kiwi Size Chart & Recommender: the returns problem

What it does. Adds size charts and measurement-based size recommendations to product pages, so the shopper enters dimensions and gets told which size to buy.

Why pet supplies specifically. The strong opinion: sizing a harness by the animal’s weight is wrong, and this category does it anyway because weight is the number owners already know. A 12kg beagle and a 12kg whippet are not the same shape. Chest girth determines fit, neck circumference determines the collar, back length determines the coat. A chart that asks for those three and returns one answer beats any amount of product copy.

The honest limitation. 4.8 stars is the lowest rating on this list, across 1,085 reviews, with a free plan and paid tiers from $6.99. If you only need a static chart and not a recommender, Jotly Size Chart & Size Guide sits at 5.0 stars across 62 reviews with a free plan, and is simpler to set up.

4. Kaching Bundles & Upsells: variety packs and starter kits

What it does. Product bundles, mix-and-match sets, volume discounts, free gifts and upsells, applied through Shopify’s own discount system.

Why pet supplies specifically. Two offers carry this category. The variety pack solves the fussy-eater problem by letting someone try four flavours before committing to a 12kg bag, and it doubles as the cheapest customer research you will ever run. The starter kit solves the other: a first-time owner has no idea what they need, so a bundle of collar, lead, bowl, treats and a chew is helpful rather than a discount gimmick. Both raise order value without touching margin, which the free profit margin calculator confirms faster than a spreadsheet.

Free to install with paid tiers from $14.99 a month, 5.0 stars across 4,964 reviews. It stays in its lane, which is more than can be said for a lot of apps that start as bundles and end up shipping an email tool.

5. Rubik Combined Listings (ours): when each flavour deserves its own page

What it does. Links separate Shopify products so they behave like one listing, with swatches on product pages and collection page cards. AI Magic Fill reads colours from your images, bulk grouping builds groups from title patterns, tags or metafields, and none of it needs Shopify Plus.

Why pet supplies specifically. People search by flavour and by need, not by brand line. “Grain free salmon dog food” and “puppy chicken kibble” are separate searches with separate intent. Keep all six flavours as variants and Google indexes one URL for the lot. Split them and each gets its own page, title and reviews, then group them so the shopper still sees one listing with flavour swatches. The free separate products versus variants tool will tell you which structure your catalogue wants, and our collection page swatches guide covers what shoppers see on the grid.

Where it is the wrong pick. It does not filter images inside a single product, which is the other app, and people conflate the two constantly. It earns nothing if your flavours genuinely belong as variants, which for a small range they often do. 63 reviews at 5.0 stars is thin next to everything else here, and that is the fair criticism: the app is young. Free for 5 groups, then $10 a month for 100, $30 for 500, $50 for 5,000.

6. Smile: Loyalty Program Rewards

What it does. Points, referrals and VIP tiers, with the usual earn and redeem rules.

Why pet supplies specifically. Loyalty programs are dead weight where people buy twice a year. Here the reorder cycle is roughly 30 days and will not change, because the animal keeps eating. That is the rare case where a points balance genuinely influences where the next order goes. Referral is the stronger half though: dog owners talk to other dog owners at the park daily, which is a distribution channel most stores ignore.

4.9 stars across 4,150 reviews, free plan, paid tiers from $15. BON Loyalty Program & Rewards is the other verified option at 5.0 stars across 1,797 reviews with a free plan, and it is worth a look before committing.

7. Preorder, Back In Stock (STOQ)

What it does. Adds a notify-me waitlist to sold-out variants with email and SMS alerts on restock, plus preorders with deposits or partial payment.

Why pet supplies specifically. A stockout here is not a delayed sale, it is a permanent one. If the veterinary formula is out, the owner buys a different brand today, because the animal eats today, and switching back is a two-week transition nobody volunteers for. It works per variant too, so the 2kg bag can show a waitlist while the 12kg keeps its buy button. Free plan, 5.0 stars across 3,424 reviews.

How to choose

The rule is boring but it works: install in the order your customers hit the problem. Food store, subscriptions first. Accessories store, sizing first.

• Selling consumables (food, litter, treats, flea treatment): subscriptions, then flavour and size image filtering.
• Selling wearables (collars, coats, walking gear): a measurement-based size recommender, then swatches.
• Selling both, which most stores do: subscriptions, sizing, images, in that order.
• Already have all three and want more order value: bundles before loyalty. Bundles work on the first order, loyalty only pays off on the third.

Six of the seven have a genuine free plan and the seventh is free to install, so nothing here needs to be a guess.

That covers products with more than one option, which is every food product you sell. Try a working store in the live demo store and setup steps in the getting started guide. Grouped flavours have their own demo store and docs.

Frequently asked questions

Which app should I use to show the right photos for each flavour and bag size?

Rubik Variant Images, built by Craftshift. It assigns a separate image set to every variant through Shopify metafields, so picking Salmon in 12kg filters the gallery to that bag while the shared ingredients panel and feeding chart stay visible. It works on 350+ themes and is free to install. 5.0 stars across 410 reviews.

What are the best Shopify apps for pet supply stores in 2026?

Appstle Subscriptions for recurring food, Rubik Variant Images for flavour and size galleries, Kiwi Size Chart & Recommender for fit recommendations, Kaching Bundles for variety packs and starter kits, Rubik Combined Listings for grouping flavours sold as separate products, Smile for loyalty and referrals, and STOQ for restock waitlists.

How do I sell pet food on a subscription in Shopify?

Use a subscription app that runs on Shopify’s native subscription contracts, so billing and checkout stay inside Shopify. Appstle Subscriptions has a free plan and 7,986 reviews at 5.0 stars. The setting that matters most is the customer portal: let people swap flavour, change bag size and delay a delivery themselves, or they cancel instead of editing.

How do I stop harness and collar returns caused by bad sizing?

Stop sizing by weight. Ask for chest girth, neck circumference and back length, then recommend one size from those measurements rather than publishing a table and hoping. Kiwi Size Chart & Recommender does this at 4.8 stars across 1,085 reviews with a free plan. Add a photo showing where to measure, because most owners guess.

Can I list each flavour as its own product and still show them together?

Yes. Rubik Combined Listings groups separate products into a single listing with swatches on product pages and collection cards, without Shopify Plus. Each flavour keeps its own URL, title, reviews and inventory, which is the point if you want to rank for flavour-specific searches. Free for 5 groups, then $10 a month.

What should happen when a pet food formula sells out?

Capture the email rather than losing the customer. A notify-me waitlist on the sold-out variant sends an automatic alert on restock, and it works per variant so in-stock bag sizes keep their normal buy button. STOQ has a free plan at 5.0 stars across 3,424 reviews. In this category a stockout is usually a permanent switch, not a delay.

Related reading

• The Shopify variant limit, explained
• Shopify colour swatches: the complete guide
• The product page optimization checklist
• How many images can you put on one variant (rubikvariantimages.com)
• Separate products versus variants for SEO (rubikify.com)

Pick the one your support inbox keeps complaining about. That is usually the flavour on the wrong photo.