Start Free Trial Whoosh vs Booster
Booster Page Speed Optimizer and Whoosh both load the next page before a shopper opens it. Booster starts loading a page when the shopper's mouse rests on a link, and it is free. Whoosh's AI Page Preloading predicts where a shopper will go next and preloads on hover, scroll or pause, and Whoosh also loads your other apps in the right order, for US$99 to US$149 a month.
Checked on both apps' Shopify App Store listings. We make Whoosh.
Looking for a Booster alternative?
If your first page loads well and only the next one drags, Booster may be all you need, and it costs nothing.
If the first page is slow too, because apps such as a popup, chat or reviews widget load before the product photo, preloading the next page will not fix that. Whoosh's Smart App Loading does: it puts those apps behind the photo, and AI Page Preloading handles the next page.
Whoosh vs Booster, line by line
| Compared | Whoosh | Booster |
|---|---|---|
| Price on the App Store | US$99 a month (Smart App Loading or AI Page Preloading); US$149 for both (Whoosh Max) | Free |
| Free trial | 7 days | Free app |
| When preloading starts | AI predicts the next page and preloads on hover, scroll or pause | When the shopper's mouse rests on a link |
| Main image of the next page | Preloaded too (LCP image) | Not on its listing |
| Third-party app loading | Yes: Smart App Loading puts the apps shoppers see first | Not on its listing |
| Install | Minutes, no code changes | Under a minute, no code |
| Support | In-app chat and email, direct to the product team | 24/7 live chat |
| Rating on the App Store | 5.0 from 10 reviews | 4.8 from 431 reviews |
Sources, checked : Booster Page Speed Optimizer on the Shopify App Store and Whoosh on the Shopify App Store. Both bill in USD; prices and plans change, so check the listing before you install.
When Booster is the better buy
- Your first page is fine and only the next page drags.
- You want a free app, with 24/7 live chat support.
- You want the longest review history of the two (431 reviews since 2019).
When Whoosh is the better buy
- Apps (a popup, chat, reviews or tracking) hold up the product photo on the first page.
- You want the next page chosen by where shoppers go, preloaded on scroll and pause as well as hover.
- You want a dashboard that shows speed next to revenue.
Questions merchants ask
What is the difference between Whoosh and Booster?
Booster Page Speed Optimizer loads a page in the background when a shopper's mouse rests on a link. Whoosh's AI Page Preloading predicts the next page and preloads on hover, scroll or pause, including that page's main image, and Whoosh's Smart App Loading also puts your other apps behind the product photo.
Is Booster free?
Yes. Booster Page Speed Optimizer is free on the Shopify App Store, per its listing on 2 Oct 2026. Whoosh is US$99 a month for Smart App Loading or AI Page Preloading, or US$149 a month for Whoosh Max, with a 7-day free trial.
Can I use Booster and Whoosh together?
Both preload the next page, so running the two preloaders at once doubles that job. If you keep Booster for preloading, Whoosh's Smart App Loading plan (US$99 a month) does the app loading on its own.
Try Whoosh free for 7 days
US$99 a month for Smart App Loading or AI Page Preloading, US$149 for Whoosh Max. Billed through Shopify, cancel anytime.
