Find out how much a slow sales page costs your launches
Course buyers arrive from ads, email and social, mostly on their phones. SIUX Studio ties the speed of your sales page and checkout to the enrolments they bring in.
Your own sales dataDelivered in 48 hMoney-back guarantee
What to fix first
yourcourse.com
Sample report, ranked by money at stake each month
- 1/course/masterclassVideo cover image is 1.6 MB$980/mo
- 2/checkoutBuy button reacts in 390 ms$620/mo
- 3/webinarCountdown timer shifts the layout$240/mo
Fix #1 before the next launch: about $980 more a month.
The driver to watch
For a course, the driver is the first screen of the sales page on a phone
Launch traffic comes from Instagram, YouTube and email, and it opens on a phone. If the video cover or hero image takes seconds, paid clicks leave before they read the promise.
What usually causes it
- Video embeds loading the full player up front
- Large hero images and background videos
- Page builders loading every block’s scripts on every page
LCPLargest Contentful Paint
4.4 s
/course/masterclass on mobile, in a sample report
+8%more sales at Vodafone after improving LCP by 31%.
Source: web.devOnline courses
Where speed costs a course creator money
Launch traffic is expensive and impatient. These are the pages where it gives up.
/course/…LCP
Sales page
Long sales pages open with a video or a large hero image. On a phone over mobile data, that first screen is where paid clicks leave.
/checkoutINP
Checkout
Payment forms, coupon fields and order bumps run on third-party scripts. A slow response to “Buy now” is a lost enrolment.
/webinarCLS
Webinar and launch pages
Countdown timers, sticky bars and embedded players load late and move the button just as people tap it.
What we measure
Five signals, and what each one costs you
Speed metrics on their own are trivia. Each one below is tracked per page and tied to the sales that page brings in.
0.1s
Faster on mobile was enough to lift retail conversions by 8.4% in the Deloitte × Google study.
Read the Core Web Vitals guideLargest Contentful PaintWhen the main image or headline shows up.Good ≤ 2.5 s
Interaction to Next PaintHow fast the page reacts to a tap.Good ≤ 200 ms
Cumulative Layout ShiftHow much the page jumps while loading.Good ≤ 0.1
Time to First ByteHow long the server takes to answer.Good ≤ 0.8 s
Revenue per pageSales matched to the page that made them.Via webhook
Calculator
What a faster sales page is worth to you
Use a normal month or your last launch. The assumption behind every figure is spelled out below.
Extra annual revenue at 3.8 s
Drag the slider to the right to see what a faster page earns.
- Revenue today
- $18,000/mo
- Sales per month today
- 91
Assumes, for every 0.1 s faster, +1% more conversions and +0.4% more visitors (fewer people give up before the page loads, plus a light Google ranking boost), both halved below 2.5 s, with visitors capped at +10%. Deloitte × Google measured +8.4% conversions for retail from 0.1 s, so this is conservative. Your real report uses your own visitors and orders.
The research behind the maths
More retail conversions from a site just 0.1 s faster on mobile.
+8.4% conversionsDeloitte × Google
Higher average order value in the same study, same 0.1 s.
+9.2% order valueDeloitte × Google
More sales at Vodafone after improving LCP by 31%.
+8% salesweb.dev
Better mobile conversion at Lazada with a 3× faster LCP.
+16.9% mobileweb.dev
Ask the report
Questions the report answers for a course
Sample answers, from the kind of data a connected site produces.
Which traffic source sees the slowest sales page?
Instagram. Those visitors wait 3.9 s on mobile, against 2.1 s for your email list, which mostly opens on Wi-Fi.
Did the new video hurt the launch?
The sales page got 1.2 s slower after the video was added, and mobile checkout visits fell 14% the same week.
Is my checkout or my sales page the bigger problem?
The sales page. Checkout reacts in 150 ms, while the sales page takes 4.4 s on mobile and carries $980 of the $1,840 at stake.
Inside the product
Three screens, one question answered
How much is my website costing me, and what do I fix first?
Loss
Last 28 daysAt stake
$3,140
/mo
Pages to fix
3
of 38
Mobile LCP p75
4.1 s
target 2.5 s
| Page | Problem | Fast vs slow conv. | At stake |
|---|---|---|---|
| 1/checkout | LCP 4.1 s | 41% vs 29% | $1,200/mo |
| 2/pricing | INP 480 ms | 2.6% vs 1.2% | $740/mo |
| 3/course/masterclass | CLS 0.24 | 2.1% vs 1.7% | $310/mo |
| 4/ | LCP 2.9 s | 1.9% vs 1.6% | $190/mo |
Fix #1 first: the hero image on /checkout is 1.8 MB and loads after two third-party scripts.
Then the alerts do the rest
Every signal flows into one place. When a deploy, a new app or a theme change makes things worse, you hear about it the same day, with the page and the price.
Deploy watch — A new release is compared with the week before it. If a page gets slower, you get an alert naming the page and what it now costs.
How it works
How it works for online courses
- 1
Get your revenue report
Share your course site and a sales export. In 48 hours you know what your sales page costs you.
- 2
Add the tracker to the pages you control
One script tag on your sales page and checkout. Under 2 KB, no cookies.
- 3
Connect your sales
Enrolments meet the speed data page by page, so each fix comes with the money at stake.
Course and payment platforms
- StripeEarly access
- WordPress, Webflow and custom sales pagesTracker only
It works on sites where you control the page code, because that is where the fixes happen.
FAQ
What course creators ask first
Talk to a person
Nothing here is a chatbot. Write to us and a founder answers, usually the same day.
Write to usWhich course sites does it work on?
I sell in launches. Does speed still matter between them?
Will the tracker slow my site down?
What do you need from me for the report?
What if the report doesn’t find anything worth $99?
Is it GDPR friendly?
still guessing?
See what your sales page costs you, before your next launch
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