The Analytics section of your imgix Dashboard offers usage statistics for your account and for imgix's service health. You can use these to gauge your site or app's usage over each month. Daily stats can show you where you have usage spikes throughout the month (useful for tracking how your website changes affect usage), and cumulative stats show you the general trend of your usage from the beginning to the end of the month. Both are tracked visually against the stats from the previous month. You can also see historical stats for the entire duration of your account by selecting a month and year.
For more information, see the Account Analytics documentation.