objective c - Auto-Renewable Subscriptions: Detecting Gaps -


i'm developing app providing digital magazines , other periodicals. integrating auto-renewable subscriptions , lot of research, came across problem of detecting gaps in subscription.

let's user subscribes month, opts out half year , subscribes again afterwards. using apple-recommended server-based architecture building audit trails , whole receipt stuff, pretty straightforward track user's subscription history. however, if there's no user-triggered transactional activity during unsubscribed period, never receive expired return value. consequence, app identify valid subscription , unlock content released when there no actual subscription.

i'm not sure if i'm missing important point, since haven't found helpful information on web far.

thanks in advance!

what scheduling cron job on server, verify current receipts once per day? or maybe found working solution that?


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