thanks for comment! i'm tracking both irregular and regular income/expense via common frequencies: weekly, bi-weekly, semi-monthly, monthly, quarterly, annually. Then that income/expense shows up appropriately on the Money Calendar with projected running balance. so even if irregular (either income or expense) you can easily see it play out in the calendar. so nothing too fancy on the technical end. user just needs to pick a frequency and/or insert one-off income/expenses as needed. I use this obsessively and find it works well.