I've never not had an android / windows PC. I don't know how the google store and Apple store would handle the subscription. Somebody from the website could probably tell you? @Leebo ?
Before I had my SWG we left for several days on a trip. Dropped pH to 7.2, Raised to SLAM, put a few tabs in the floater and inline chlorinator, set the robot to run every day. If you don't have all those things, just do what you can. Raise to slam and put a few tabs in a $10 floater if you don't already have one. You probably don't have to drop pH, looks like your TA is well under control. I was just doing it because my TA was still making it skyrocket up to 8.2... If you are noticing pH trying to rise higher than you'd like in that time frame you're gone, you might consider lowering it down a few points. A day or two at high pH won't cause scale if you come back and immediately take care of it.
Oh my. Your FC loss is almost nothing. That’s awesome. You wouldn’t in theory need to go to SLAM for 3 days as your expected FC loss will be around 3. But. It also won’t hurt and it will be total piece of mind. If you come home to 12 FC (?) and a stupid clear pool, then woohoo. Ya know ?
And it's safe to swim at any FC level below SLAM as long as the water is clear. And the quickest way to lower FC levels back down to normal is... HAVE A POOL PARTY TO CELEBRATE YOUR RETURN AND RELAX FROM TRAVEL.