Plan
Free
$0
No subscription
- 1 published size chart
- Size table on your product pages
- Button on every theme
Pricing
Free to start. Then a flat price, no per-order fees.
The Free plan shows the size table of one size chart. HeyFit adds the recommended size, “Select size”, learning from returns and unlimited size charts, for an amount known in advance: no fee per order, no commission on your sales. Billed by Shopify, with your Shopify bill.
Pricing
Plan
HeyFit
$19 per month
Store billed in euros: €19 per month.
- Unlimited size charts
- A recommended size for every shopper
- “Select size” on the product page
- Learning with HeyReturn
How billing works
- Billed by Shopify, on your Shopify bill: we never see your payment method
- The trial applies once per store: after reinstalling, it resumes where it left off
- No commitment: switch back to the Free plan anytime, from Settings, without uninstalling
- Only an owner or an administrator can activate the subscription
- Without a subscription, your size charts are never deleted: the first stays published, the others come back as soon as you upgrade to HeyFit
Why HeyFit
Two differences, you can check in the app.
What HeyFit does, next to what most size guides for Shopify offer.
Advice that learns from your returns
With HeyReturn, from the same Heylio suite, “Too small” and “Too large” returns are counted product by product. From 3 returns in the same direction, the trend shows; from 5, the recommended size shifts by one size. Your own declaration always comes first.
A flat price, no per-order fees
A monthly subscription with an amount known in advance: no fee per order, no commission on your sales. Billed by Shopify, with your Shopify bill.
| Criterion | Most size guides | HeyFit |
|---|---|---|
| Size advice | A fixed chart: the advice stays the same, whatever your returns say | Learns from your returns with HeyReturn: the recommended size adjusts, item by item |
| An item that runs small | Up to you to spot it, then fix the chart | Spotted by your returns, or declared by you: shoppers see the recommended size and the reason |
| Price | Often tiered, by number of orders | A flat monthly price, no per-order fees |
Comparison based on the public plans of size guide apps on the Shopify App Store, in October 2026. A few custom-quoted solutions, built for large retailers, also learn from returns.
Your questions
Questions about the subscription
How much does HeyFit cost?
Two plans:
- Free, with no subscription: 1 published size chart, and the size table on your product pages (the button then reads “Size chart”); no size recommendation, no “Select size” and no learning from HeyReturn returns;
- HeyFit, all included: unlimited size charts, size recommendations, “Select size” and learning from returns — €19 per month if Shopify bills your store in euros, $19 (US dollars) per month otherwise, plus applicable taxes, with a 14-day free trial.
The subscription is billed by Shopify, on your Shopify bill: HeyFit never sees your payment method. Prices exclude taxes: any applicable VAT or local tax is added by Shopify to your bill.
The trial applies once per store, and its end date is set as soon as it starts: it never pauses. If you switch back to the Free plan or uninstall HeyFit, then come back before that date, you only get the days left until it; after it, the subscription starts with no trial.
How do I upgrade to HeyFit?
With the “Upgrade to HeyFit” button, in the banner at the top of the pages, in Settings or wherever a feature is reserved for HeyFit: Shopify shows you the plan, which you approve. Only an owner or an administrator can activate it.
Without an active subscription or running trial, your store is on the Free plan: only your first size chart stays published, as a size table. Your other size charts are never deleted: they are kept, not shown, and come back as soon as you upgrade to HeyFit.
How do I stop the subscription?
In Settings, Subscription card, click “Switch to the Free plan” (owner or administrator): the subscription stops right away in Shopify, with no refund of the current period already paid. Your store moves to the Free plan: nothing is deleted, and your first size chart stays published as a size table. A running trial stops too, and keeps its end date (see “How much does HeyFit cost?”). There is no minimum term.
Uninstalling HeyFit from the Shopify admin also stops the subscription, with no refund of the current period already paid, and the store’s data is then deleted 48 hours later. To stop paying while keeping your size charts, use “Switch to the Free plan” instead.
No commitment
$19 per month, 14 days to try it.
$19 per month · 14-day free trial. Billed by Shopify, with your Shopify bill. No commitment: switch back to the Free plan anytime, from Settings, without uninstalling.