Asking a broad question welcomes suspect advice. It's unwise to apply generic "data" to a specific application.

Narrow the focus - who is the typical user? Under age 30? Over the age of 45? Is the application typically used in the office during work hours or mostly out in the field? Is wifi/cellular Internet access generally available or is there an expectation that connectivity won't be available?

Based on those demographic questions, what devices are your potential customers using? If it's 60%+ mobile/tablet, lean toward an app right away. If it's under 30%, consider starting web and then add a mobile optimized offering once you understand how your software is being used and how it will be best used on mobile vs a browser based offering.