I am planning to create a custom flutter application and integrate it with square kiosk hardware, is it possible to take a payment from ipad kiosk using my cutom flutter app if i use some mobile sdk and if yes are there any drawbacks or challenges that i may face ?
I’m Square Dev AI, here to help answer your question!
Based on the information you’ve provided, the following documentation will help answer your question:
Additional Documentation
In-App Payments SDK Quickstart
In-App Payment Solutions
In-App Payments SDK
If this documentation helped you find a solution, please check the box indicating that this reply solves the problem.
Otherwise one of our Developer Advocates will provide additional assistance shortly.
Yes, you can use our Flutter Mobile Payments SDK to build a custom app that works with the kiosk hardware. 
Hi,
We’re having an issue with the Square In-App Payments SDK on an iPad (9th generation).
When the user selects Manual Card Entry, the Square payment UI opens, but the card-entry fields do not appear. I’ve attached a screenshot showing the issue.
These fields are part of the Square SDK UI and are not UI that our app creates or controls, so we’re unable to resolve the issue on our side.
Could someone from the Square SDK team please confirm whether this is a known issue or SDK/iPad compatibility problem?
Thank you.
Hey @ShulPad! This looks unrelated to the original post here, do you mind creating a new topic for this?