Wood species

The app is great,helps to discribe wood classifications.but Philippine iron wood is different as we knew one more harder than it.but im not sure what is its scientific name as we only call it iron wood.brown wood,have cracks vertical following the grains when its dried,and shiny inside when cut vertical.no nails can pass through it when dried.popular use for bench and stools,and native fornitures.diameter,as what I've seen,4-5 inches.