Transactions will not show up in the app until they are approved and posted by your bank, which can take up to three days, especially for credit card transactions. If you made a purchase on the weekend, it is possible that the transaction will not be approved in time for weekly transfer of roundups, which happens on Monday. A little delay between the time you make a purchase and the appearance of that transaction in the app is completely normal!
If it’s been more than three days and the purchase wasn’t made on a weekend, it is also possible that your Moka account was unable to connect to your bank to capture transactions. In this case, it’s best to reach out to the Customer Success team by email or in the app so that they can investigate for you.