Zdoo 2.2+ has statistic report which will help you understand your incomes and expenses per month/year.

1. Go to "CASH"->"All", you will see all your transactions here. Click year/month to filter them. You can click "Import"/"Export" to import/export data on the current page or all your transaction data.

2. Go to "CASH"->"Report". You can see your yearly balance sheet and your monthly balance sheet in the right column of the page.