The journal queue is located in in Sitoo POS > Menu > Settings > About.
If the journal queue is 0, it means that Sitoo POS is online, as it should be. If the number in the journal queue is anything else than 0, ie 1 or higher, it means that Sitoo POS is or has been offline.
This could, for example, be caused by network problems in your store. When this happens, the transaction will be stored offline in the POS. Journal queue 1 in this case indicate that one transaction has been stored offline due to temporary network problems at the checkout.
If you have followed the network troubleshooting guide and you find that your iPad now is reconnected to your network, but still have a number higher than 0 in the journal queue, please try to close your checkout, producing a z-report.
Sitoo POS > Menu > Close the box.
After that, the journal queue should be 0 again, provided that your iPad is online with a working network.