Depends on your habit.
If you check your tyres every time before you drive off, then no need.
A tyre can go flat quickly overnight with a screw or a nail.
Checking it every month is not good enough.
You're only checking for low tyre pressure, in which case you'd probably top it up at the same time.
Also avoid all construction areas. The banglas tend to drop nails or screws near the road for your tyres to pick up.
I do 1500 - 1600km/mth. Is checking once per mth enuff for pressure, bar things like nails..? If i have driven 20km in sg highway legal speed do i need to pump 5 or 10 kpa more than manual says to compensate?