You can export your iOS device transactions as well as details of your conversions quite comfortably as csv file.

Export transaction details as csv file:

'Accounts' > 'Select Accout' > 'Open transaction Details' > select the upload icon in the toolbar and csv. Then enter the location where you want to export the csv file (iCloud, Drive, iBooks, Dropbox,...)

Export several transactions as csv file:

'Accounts' > 'Select Accout' > 'Select Edit above the transaction list' > Mark the desired transactions in the transaction list' > select the upload icon and csv. Then enter the location where you want to export the csv file (iCloud, Drive, iBooks, Dropbox,...)

Export all transactions of an account as csv file:

'Accounts' > 'Select Accout' > 'Select Edit above the transaction list' > select the upload icon and csv. Then enter the location where you want to export the csv file (iCloud, Drive, iBooks, Dropbox,...)