DSS is 15 and completely unwilling to self-regulate his phone use.
He's on it 24/7 unless DP physically takes it off him (doesn't help that he's also in his first relationship and his girlfriend's parents basically leave her home alone all the time, so she's permanently online too)
He's also recently become incredibly unreliable about coming home at agreed times, and has messed his mum about on multiple occasions telling her he's in one place and going far, far beyond his usual limits of distance.
Lots to figure out and work on, and there's a lot happening in everyone's lives at the moment that makes this an extra-stressful situation (I don't want to drip feed but also won't bore you with all the details here)
All of which is just some context to say: DP and DSS's mum are looking into those apps where you can lock the phone after an agreed time (say 11pm) and see where each another are.
Does anyone have any particular recommendations?
What makes it a bit more complicated is that there's practically zero normal phone coverage at DP's flat, so if DP is out at work (he works evenings) he can only get in touch with DSS if DSS has internet access.
Thanks in advance for any suggestions / experiences