What a challan has to carry
The date, your details and the buyer's, a description of the material with quantity and unit, the destination site, the vehicle number, the driver, the transport charge, and the name and signature of whoever received it. Miss any of those and the document does not do its job when it is needed. MaterialBill produces all of it in one screen while you are loading the truck, and the challan links to the invoice it belongs to so the two are never separated.
Records that survive the argument
Because the challan lives against the party rather than on a pad, it is retrievable years later and can be resent on WhatsApp in one tap. When a contractor disputes a delivery you are not producing an amount, you are producing a document with a date, a vehicle number and his own man's name on it. In practice most disputes end at that point, which is worth more than the time the software saves — a single contested load in this trade is often several lakh.
One party, many sites
A builder buying from you for three years across a dozen projects needs a ledger that can be read whole and site by site. Each delivery records the site it went to, so you can produce everything that went to one tower or one address without going through the whole account. That is what settles the common argument, which is almost never about whether material was supplied but about which project it was supplied to.
Freight, e-way bills and the GST position
The transport charge sits on its own line rather than being buried in the rate, so the customer sees what is material and what is delivery, and your own margin on the two stays visible. Under GST a delivery challan is the correct document where goods move without a sale being complete — stock transfers, goods sent on approval, material moved to a job site. Where a load crosses the e-way bill threshold, the value, HSN codes and vehicle details are already on the record for the portal.