Would it be possible to build a Invoice Tracking app?

Yes, definitely! You can prototype any internal tool you can imagine. If any elements are missing, you can create your own using custom HTML, CSS and Javascript. However, I’ve noticed that complex apps often struggle with performance issues, so it’s a trade-off between functionality and performance. That said, simple internal apps tend to run smoothly. I highly recommend reading the thread below which includes viewpoints of other developers working on business apps.

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