looks good.

little bug: when creating a new item, additional alarms for this item can't be saved until the item itself is saved.

i've got another feature request:
sometimes i'd need control over the elapse time since the alarm was ringing, for example when making different sorts of tea and using just one timer or when experimenting with cooking time.

so, when ringing turning the countdown into a stop watch that can be halted by tipping the red area would be useful. It should do keeping the countdown running while showing a minus sign (or even without it).