Fridge and freezer temperature logs

The problem

Paper logs get filled in at the end of the day, readings are copied from yesterday, and an out-of-range reading is written down with nothing about what was done.

How a round works

1. Today shows which units are due — for example morning and evening rounds, on the days you are open.
2. Enter each reading. The previous value is never pre-filled as a new measurement, and 0 °C is a real reading, not a blank.
3. A reading outside the range you set asks what was done — moved the food, adjusted the unit, discarded stock — and can schedule a recheck.
4. If a check can’t be done, record it as not taken with the reason.

The range in force when the reading was taken is kept with the record, so changing a unit later doesn’t rewrite history.

Afterwards

Records shows every reading with its time, person and any action, and exports them for a chosen period.