Also, if you can’t get regular sync work, you can also use Export (share) and then Import of the match export file and select “Merge” option.
As an alternative to a tablet you can run PractiScore app for android on a Chromebook. Larger screen, keyboard, touch pad and a mouse come handy when preparing for your match, registering and squadding shooters, as well as a regular suite of Google apps - Gmail, Google Sheets etc. You can find some decent devices in a $200-300 price range.
Make sure that the specific model you want to use has Google Play support, then you can just install the PractiScore app from the Google Play app store.
The PractiScore app runs on a Chromebook fine, however some Chomebooks are set with pre-configured multi-layer virtual machines, network firewalls and security layers that are getting in the way of wifi sync with other devices. For those Chromebook devices, the sync code shown on your Android devices and on Chromebook connected to the same wifi will look different (the first 2 letters that matter).
This happen because Chromebook device has an “internal” network address (available to PractiScore app running on Chromebook) and another “external” network address (not available to the PractiScore app running on Chromebook, but visible to other devices on the same wifi).
In this case, entering Chromebook’s sync code on the sync screen on another tablet won’t work, but when you run “Refresh” on a tablet, it will find your Chromebook under a different sync code (corresponding to the “external” network address of the Chromebook). Then you could use that sync code (or a found Chromebook device) to pull changes to your Android tablets.
For the other way around, the app on the Chromebook will need to know where other Android tablets are. The app will try to check for a common network address when you run “Refresh” on the wifi sync screen. Many wifi access points are using 192.168.1.* network by default and it may just work.
But when your network is configured differently you can manually override the “external” network address in the PractiScore app running on Chromebook. For that, open the PractiScore app on a non-Chromebook device on the same network. Find the sync code at the bottom of the main app screen and do a long-tap (tap and hold on it) to open network info (see below). You will see the device wifi address at the top. Note first two segments (e.g. 192.168 in the example below). Then go to the PractiScore app on Chromebook, open the wifi sync screen, enter these into the “Sync Code” entry field (used for manual sync code pull), following with the Android device sync code (e.g. 192.168.017F) and then tap “Refresh” at the top of the screen. After that it should find Android devices on the “external” network.