SumUp Stock Sync

The reviews are overwhelmingly negative, with every reviewer reporting that the app does not work as expected. The most common complaint is failed or unreliable syncing between the POS/back-office system and Shopify, especially around stock levels not updating correctly even after force sync attempts. Several users also say the app is effectively unusable in their region or setup, particularly outside the UK or with certain SumUp products, which makes the app feel misleading or overly limited. On the positive side, there are very few direct positives mentioned, but the reviews do imply that the app is intended to solve an important inventory and POS integration need. However, that potential is overshadowed by serious frustrations with functionality, compatibility, and support. Customer service is described as poor or unhelpful, and some merchants feel they were sold expensive hardware and a paid service that does not deliver on its promises. Overall, the dominant sentiment is disappointment, wasted money, and a strong warning to avoid the app.