The saying goes like this: "What is bought well, is always sold well" Harold helps recyclers and recycled materials traders live according to the saying. Our smartphone and web application combined with smart AI algorithm help do the following: 1. Prepare great offers and broadcast them efficiently to suppliers 2. Collaborate and seize new opportunities 3. Efficiently communicate with logistics, commercial back-office, suppliers and customers 4. Track contract execution and get alerted in case of major deviations