The performance and scaling of a Bubble app are heavily impacted by how the app is built. The talented developers of RapidDev build this template. Upsumo works highly optimized and has high performance. To make sure of this, you can test the template.
How many users can use my app at the same time?
Unfortunately, there is no definite answer to how much instantaneous user traffic your application can handle because the functions of each application, how it is built, and the number of workflows that can work instantly is different.
At this point, the "Logs" tab in the application editor comes to help us. From this tab, you can see how much of the application's capacity is spent, when it is approaching its limits, and which workflows are consuming capacity. You can increase your app limits by upgrading or purchasing additional capacity when you need it.
For detailed information about “capacity” → https://manual.bubble.io/help-guides/optimizing-an-application/performance-and-scaling#capacity