Accounts and cash flow
Most of your cash movement already happens inside orders. Sankalp posts it to accounts as it happens, and you add vouchers only for what is left.
Posted from the work you already do
A payment recorded on a sales order becomes a receipt. A payment recorded when a purchase order is delivered becomes an outflow. If someone corrects an amount later, the correction reaches Accounts as well, so the order and the books do not drift apart.
Cash in, cash out, net
The Accounts screen shows total inflow, total outflow and net cash in hand, with each entry's category, party, mode and reference. Modes include cash, UPI, NEFT/RTGS and cheque.
Vouchers for everything else
Rent, power, freight, a random receipt: add a payment or receipt voucher with a category and a reference. It is a ledger you can read at a glance, not a full double-entry system, and it is meant to sit beside your accountant's software, not replace it.