A capital ledger per investor, and a profit share that is worked out — not argued over.
Money comes in from more than one partner, and at settlement nobody agrees on who put in what or who is owed which share. A ledger per investor ends that conversation.
TameerBook keeps each investor’s capital in and out, and splits a project’s profit by the rule you set — so the share is calculated and recorded, with paid and unpaid clearly marked.