Private local processing
Understand your gas and electricity usage.
Upload a zip export containing Readings-Readings.csv. The app reads it in your browser, normalises readings onto whole days, and prepares a customer-friendly usage summary.
Waiting for a zip file.
Customer view
Usage summary
Upload your readings, then choose a period to calculate energy usage and estimated cost.
Date range
Choose a period
No data loaded.
Upload a zip file to calculate your usage summary.
Period comparison
Compare periods
Upload your readings, then compare a selected period with an earlier month, quarter, or year.
Base period
Choose what to compare
No data loaded.
Upload a zip file to compare periods.
Debugging
Data tables
Upload a zip to populate the tables.
These tables are kept for checking the calculation pipeline. The Summary tab is the customer-facing view.
Calculation source of truth. Conversion factors are only used in the Energy stage, and rates are only used in the Costs stage.
Original uploaded readings from the CSV, before usage, conversion, sampling, or pricing.
Reading-to-reading deltas only. This stage does not calculate kWh or prices.
Integer-day intervals spread evenly into daily gas and electricity unit values.
Daily sampled units converted to energy values. Electricity units become kWh; gas cubic metres are converted using the gas parameters.
Daily energy values priced using the rate parameters and one day of standing charge per row.