Your checkout breaks on mobile
Most of your traffic is on a phone, and a checkout that fails there, or in the Instagram in-app browser, loses buyers at the exact moment they're trying to pay. These breaks are often invisible on the desktop you test from.
Signs this is happening to you
- Add to cart does nothing, or needs two taps, on certain phones
- The checkout button is unresponsive or scrolls off screen on mobile
- Orders come in from desktop but mobile conversion is near zero
- Paid social traffic, which lands in in-app browsers, barely converts
What's usually causing it
- In-app browser incompatibilityThe Instagram and TikTok in-app browsers handle scripts, cookies, and payment sheets differently. Code that works in Safari can silently fail there, and that's where most paid social traffic lands.
- A script error that only triggers on mobileA single JavaScript error on the product or cart page can disable the add-to-cart or checkout button on mobile while desktop stays fine.
- Tap targets and layout breakageButtons that overlap, sit under a sticky bar, or fall below the fold on small screens stop shoppers from completing the action.
- Slow or blocked payment sheetsExpress wallets like Shop Pay, Apple Pay, or Google Pay that fail to load in an in-app browser strip away the fastest path to purchase.
How Mimetic finds it and ships the fix
Mimetic actually taps through your buying path on real mobile and in-app browser environments, so it catches the breaks your desktop testing never will.
- We run add to cart and checkout on mobile Safari, Chrome, and the Instagram in-app browser
- We catch the script errors, dead buttons, and broken payment sheets that block the purchase
- We rank each break by how much paid and organic traffic it's costing you
- We open the fix as a pull request so the broken step is repaired, not just reported
A large share of Instagram and TikTok ad clicks open inside the app's browser. A break there directly taxes every dollar of social ad spend.
Questions
It works on my phone. How can checkout be broken?
Breaks are often specific to a device, OS version, or the in-app browser inside Instagram and TikTok. Your phone and browser may be among the ones that work while a meaningful slice of your buyers hit the failure. Mimetic tests the environments your traffic actually uses, not just one.
Why does my Instagram traffic convert so much worse than other sources?
Instagram ad clicks open in the app's in-app browser, which handles scripts and payment sheets differently from Safari and Chrome. Add-to-cart or checkout often breaks there specifically, which shows up as poor conversion from paid social.
Can you fix the mobile issue or only flag it?
Mimetic identifies the exact failing element and can open the fix as a pull request your developer reviews and merges, so the buying path is actually repaired rather than left as a note in a report.