The status of a tick when the tick is delivered to the registrar grain. In case of failures, it may happen that a tick is not delivered on time. The app can notice such missed ticks as follows. Upon receiving a tick, the app can calculate the theoretical number of ticks since start of the reminder as: curCount = (Now - FirstTickTime) / Period The app can keep track of it as 'count'. Upon receiving a tick, the number of missed ticks = curCount - count - 1 Thereafter, the app can set count = curCount