> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://docs.helixo.co/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Using hundreds of upsell apps

> Unfortunately, It's Not Gonna Work 

### Why?

Most of the upsell `apps use the same AppStore draft order` to `apply discounts` to the upsell products. So, There will be conflict among all these apps.

Only the `app that gets control over` the `checkout button` on the `cart page` works and applies the discount.

This is based on several factors like,

* Installation order of app.

* script loading.

* additional scripts injected to theme etc.

> **Related LInks **
> [Quick! Quick! Quick Money!](https://docs.helixo.co/en/article/quick-quick-quick-money-1vr39ta/) 
> [Not contacting the support agent](https://docs.helixo.co/en/article/not-contacting-the-support-agent-1otc23a/) 
> [Using hundreds of upsell apps](https://docs.helixo.co/en/article/using-hundreds-of-upsell-apps-kjmvtu/) 
> [Staying in Free Plan [Old Users]](https://docs.helixo.co/en/article/staying-in-free-plan-old-users-17wooyh/) 
> [Trying to do what app can't do](https://docs.helixo.co/en/article/trying-to-do-what-app-cant-do-1u7elx4/) 
> [Not measuring the funnel performance](https://docs.helixo.co/en/article/not-measuring-the-funnel-performance-bg457q/) 
> [App install, Quick uninstall](https://docs.helixo.co/en/article/app-install-quick-uninstall-1g3xcjh/) 
> [No patience!](https://docs.helixo.co/en/article/no-patience-1adjg3y/) 
> [Not testing funnels properly](https://docs.helixo.co/en/article/not-testing-funnels-properly-1gmm6s1/)

Hope you've got some value from this article. Let us know your feedback 🙂 We are excited to hear your thoughts.

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