Rendered Fits · Merchant guide
Shopify sizing and virtual try-on apps compared
Compare Rendered Fits, Antla, GenLook and Kiwi by the shopper problem they address, published capabilities and what to test on your own store.
By the Rendered Fits team · Reviewed 13 September 2026
How this comparison was made
Publisher disclosure: Rendered Fits publishes this guide and is included in it. We selected three Shopify-listed alternatives that illustrate adjacent buying choices: two shopper-photo try-on apps and one sizing-focused app. This is a review of public listings checked on 13 September 2026, not a hands-on benchmark or an exhaustive market ranking.
We do not score image quality, fit accuracy or commercial performance without a comparable test. A feature absent from this summary should be checked with its vendor; absence is not proof that the feature is unavailable.
About Rendered Fits. Rendered Fits is a Shopify app for fashion brands that recommends a size for supported products from the brand's own size chart, and can show shoppers an optional AI try-on preview. There is a Free plan, and Complete is $349 a month with a 14-day trial.
Compare the buying choices
Download the checked source table (CSV)
| App | Published capabilities | Why evaluate it? | Commercial check | Source |
|---|---|---|---|---|
| Rendered Fits | Virtual try-on, product-specific size recommendations and Complete the Look. | A Shopify fashion merchant evaluating appearance and suggested size in one experience. | Ongoing Free plan; optional paid plans. Current allowances. | Shopify listing |
| Antla | Shopper-photo virtual try-on; styling with existing sizing information; analytics and marketing integrations listed. | A merchant comparing visual try-on and promotional workflows. | Paid plans and a trial listed; check current tier and terms. | Shopify listing |
| GenLook | Shopper-photo virtual try-on, email collection and engagement analytics listed. | A merchant comparing try-on and lead-capture workflows. | Free and paid plans listed; review generation allowances and additional charges. | Shopify listing |
| Kiwi Size Chart & Recommender | Customisable size charts, AI fit recommendations and product or collection size guides listed. | A merchant whose primary requirement is chart management and size recommendations. | Free and paid plans listed; check which tier includes the required recommender. | Shopify listing |
Choose the problem before the product
- “Which size?” Prioritise product-specific size information, shopper inputs, uncertainty handling and recommendation evaluation. Compare Rendered Fits sizing with a sizing-focused workflow such as Kiwi.
- “How will it look on me?” Compare own-photo try-on flows, including Rendered Fits, Antla and GenLook, using the same product selection and suitable photos you have permission to use.
- “What goes with it?” Evaluate outfit recommendations, catalogue suitability and cart behaviour. Rendered Fits includes Complete the Look; confirm the exact workflow you need with each vendor.
Use the same test for every shortlisted app
- Select a straightforward garment and a difficult example, such as a detailed print or layered outfit.
- Check colour, pattern, garment shape and obvious image artefacts. Record limitations as well as successful examples.
- Complete the journey on a phone: open the widget, provide input, receive a result, choose an available variant and add to cart.
- Review size guidance independently from how realistic the image looks.
- Inspect permissions, privacy information, support, cancellation terms, included usage and the cost of exceeding an allowance.
- Measure completed journeys and commercial outcomes using a consistent window. Do not compare vendors using their headline uplift claims.
Corrections to our earlier comparison
An earlier version described Antla and GenLook as model-only visualisation tools and made unsupported comparisons about output quality. Their current listings describe shopper-photo try-on. We have corrected that classification and removed those quality rankings. We have also removed unsupported Rendered Fits return-reduction percentages.
Next steps
Watch Rendered Fits in use, review your size information and set an evaluation plan. Recheck the linked listings before committing because capabilities and terms can change.
What Shopify merchants say about Rendered Fits
★★★★★ 5/5 ·
“Sienna & Sidney have been very responsive and adaptable to our needs. Its early days but first signs are that browsers are using the technology and it is contributing towards increased sales.”
Really Wild Clothing Company, United Kingdom · Shopify App Store review★★★★★ 5/5 ·
“Our partnership has significantly enhanced the customer shopping experience, resulting in increased sales and measurable value for our business. The team has been exceptional to work with—reliable, collaborative, and consistently committed to delivering high-quality service”
University of St Andrews Shop, United Kingdom · Shopify App Store reviewRead Rendered Fits reviews · See the reviews on the Shopify App Store
See whether Rendered Fits suits your store
Try your product imagery, check size guidance and review the shopper journey before rolling out.