Describe the job before choosing the software
Write down who needs to use the solution and what they need to accomplish. Do they need information moved between existing tools, or do they need a new place to work? Those are different problems, and they can lead to different scopes.
Use integrations when the work already has a home
If your CRM is the right place for an inquiry and your messaging platform is the right place for a conversation, the missing piece may be the workflow between them. Field mapping, ownership, notifications, and exceptions can matter more than a new interface.
Consider an app when the user needs a workspace
A custom tool can make sense when people need to review information together, track progress, handle a structured process, or use an experience that existing products do not provide. The application should have a clear job beyond collecting features in one place.
Define the first useful version
Prioritize the smallest set of capabilities that lets the intended user complete the essential workflow. Keep later ideas visible but separate. This makes the requirements easier to discuss and gives the first release a concrete acceptance point.
Include access, handover, and maintenance
The delivery plan should cover who uses the application, what data it needs, who owns the accounts, and what happens after rollout. A working first version is one stage of a useful business tool, not the whole operating plan.
Discuss both options in the same brief
You do not need to choose a tool before asking for help. Describe the current process, its limitations, and the result you want. A focused review can compare an integration, an application, or a staged combination of both.