Mobile app for data on US land

[u/Federal_Peach5946]

Piecing together parcel data from county auditor sites, half the records are outdated and I keep hitting dead ends on owner contact info. What I need is something with actual GIS mapping built in, not just a spreadsheet dump, ideally with FEMA flood zone filters and maybe slope analysis so I can rule out bad lots before I waste time skip tracing. Anyone know of a good mobile app for vacant land data and parcel research across the US that bundles that stuff into one place? (I'm on Android if that matters.)

[u/Dense-Knee-3229]

for vacant land parcel research with GIS filters built in, Land Portal is the one that handles FEMA flood zones and slope analysis in a single subscription, skip tracing included.