Eve devices store some of their measurements internally and provides an unofficial interface to load them through HomeKit. Until now only the Eve app used this interface to show those measurement in a chart.
Home+ now also supports downloading history data from Eve accessories in version 6.0. The data is downloaded from the Eve devices automatically when the detail view of the device is opened. The chart shows the measurements from the last 24 hours, 7 days, 30 days and 12 months.
Charts are currently available for Eve Thermo, Eve Room, Eve Weather, Eve Degree, Eve Motion and Eve Door.