Hi @Garry_Hawker,
ARC’s framework inherently limits the duration of time the app can remain in Offline Mode. There’s not a hard-limit, since authorization, intermittent availability of cellular service, and phone OS all play a factor.
These limitations are partially for anti-piracy considerations, but there are also mechanical and curatorial considerations for database curation. Offline Mode allows for certain processes within ARC’s copy of the Roon database to continue to function autonomously, but it’s not equipped to maintain your database indefinitely. Accumulated changes between an Offline ARC instance and a RoonServer machine that remains online - and updating - can pose a corruption risk.
We’ve escalated internally to see if we can provide a clearer answer or a workaround for this particular use case. Please allow our Product team a chance to review the case and respond and we will follow up as soon as possible.