Short answer
eFaktura.nl is an invoicing and administration app for businesses in the Netherlands, Belgium, Germany, France, Poland and Luxembourg, available in Polish, English, Dutch, German, Hungarian, Romanian, Ukrainian, Russian, Slovak and French. You use it to write invoices and quotes in five invoice languages, send them via Peppol as well, and keep track of expenses, hours and mileage. There is a free plan (one invoice a month) and paid plans at €11.99, €16.99 and €24.99 a month excl. VAT, with a 30-day free trial without payment details. eFaktura.nl does not mention bookkeeping with a ledger, a VAT return or bank reconciliation: you give your bookkeeper access to your invoices and expenses, and they do the rest. The booxx package costs €19 a month and is full double-entry bookkeeping in five languages — Dutch, English, Polish, Hungarian and Romanian — with bank reconciliation, VAT return, annual accounts and audit file, translated down to the ledger accounts. If a bookkeeper keeps your books and you mainly want to invoice quickly, write quotes and log mileage, eFaktura.nl is the better and cheaper fit; if you want to keep your own books, in your own language, you need more than an invoicing app.