The meter tells you the total. This tells you what you used.
A meter only ever counts upwards, so the number on the dial answers a question nobody asks. What you want is the difference: 79 kWh this week against 88 the week before. Note the reading every Sunday and the log does the subtraction, every time, for as far back as you have been noting it. No spreadsheet column of formulas, and no doing sums in your head in a cellar in January.
Opens Log App and adds this log with example entries. You can clear the examples anytime.
On a computer? Scan this with your phone’s camera to set it up there.
One number a week off the dial. The consumption works itself out.
Also called a meter reading log, kWh tracker, electricity usage diary or energy logbook.
9:41●●● ▲ ▮
‹Electricity meter⚙
homemoney
95.6kWh
Avg per week Consumption · 6 entries
1 / 1 this week
Yesterday
74 kWh Consumption · 41676 kWh Meter reading · 3 kWh Change in consumption
Sun 18 Oct
71 kWh Consumption · 41602 kWh Meter reading · -8 kWh Change in consumption
“Dishwasher on the eco cycle all week. It shows.”
Sun 11 Oct
79 kWh Consumption · 41531 kWh Meter reading · -5 kWh Change in consumption
Sun 4 Oct
84 kWh Consumption · 41452 kWh Meter reading · -4 kWh Change in consumption
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What you’ll track
The Electricity meter log, out of the box
One entry per session, with the timer and location always available. Add or rename variables any time in log settings.
Variable
Type
Stats shown
Consumption · kWh
Formula · Meter reading − Meter reading (previous)
Avg per week, Sum, Average
Meter reading · kWh
Number
Max
Change in consumption · kWh
Formula · Consumption − Consumption (previous)
Average
Timer
Built in
Total time, per entry duration
Location
Built in
Pin or place, shown on the log map
Notes, photos, sketches, voice memos
Built in
Attached to any entry
95.6kWh
Avg per week Consumption
396kWh
Sum Consumption
79.2kWh
Average Consumption
41676kWh
Max Meter reading
How it works
From install to first entry in a minute
1
Pick “Electricity meter” during setup
The log is created with the variables above and a few example entries so you can see how it works. Clear them with one tap.
2
Log as you go
Tap plus, fill in what you have, save. Timer, location, notes and photos are there when you want them, hidden when you don’t.
3
Let the stats accumulate
Avg per week consumption sits on the log card, with the rest one tap away. Set a goal if you want a nudge.
Why this log
Built for the way you actually do it
The subtraction happens for you
Consumption is a formula field: the app works it out from this reading and the one before it, on every entry, every time you look. Correct a reading you mistyped three weeks ago and the week after it corrects itself too. Nothing is stored that can go stale.
Your leanest week, kept
Set the record direction to lower and the log remembers the smallest weekly consumption you have ever managed, with the date it happened. It is a more useful target than a number off a bill, because you have already done it once.
A reminder on the evening you actually read it
The log learns when you tend to enter a reading and nudges you then, and tells you when a week has gone by without one. A gap is the one thing that genuinely spoils this log: a missed Sunday turns two weeks into one big number.
Everything else in the app
Not just a form. A logbook that thinks with you.
The Electricity meter log is one log among many you can keep. Every one of them gets the same tools.
💡AI analysis
AI reads the pattern for you
Tap the bulb on Electricity meter and get a plain-language read of your trends, what changed recently, and a suggested next goal, built only from your own entries.
🎯Goals
Goals, streaks and reminders
Set a target like three times a week, watch the rolling progress bar, keep a streak, and get a reminder at the time you actually log. The app learns that time from you.
📅Calendar
A calendar heatmap per log
Every log has its own month view showing which days you logged. Gaps are obvious, consistency is visible, and one tap opens that day's entries.
🔁Rounds
Several rounds in one entry
Every exercise in a workout, every piece in a practice session: logged together in one entry, broken out automatically in the stats.
📷Attachments
Photos, sketches, voice memos
Attach a photo, draw a quick sketch, or record a voice note on any entry. They stay with that entry and come back on every device you sign in on.
🗺️Map
Every entry on a map
Drop a pin or search for the place. Each log has a map view of everywhere you logged, and saved places open directly in Google Maps.
🔍Search
Search across everything
Find an entry by title, note or value across every log, filter by date or location, and jump straight to it.
🔒Privacy
Yours, offline first
Entries save on your phone first and sync when you sign in. No account needed to start, no feed, no one else sees your data.
Who writes down meter readings
People on a tariff that bills them once a year off a single reading, who would rather find out in March than in December that the annual estimate is wrong. Landlords and flat-shares splitting a bill, where the only fair basis is two readings and a date. And people who have just changed something — a heat pump, a new fridge, a tumble dryer retired — and want to know within a month whether it did anything.
It suits a cellar meter rather than a smart meter with an app of its own. If your supplier already gives you daily kWh, you do not need this. If your meter is a dial behind a little plastic door, a photograph of it on your phone and a number in a log is the whole of your data, and it is enough.
What five weeks of readings shows
The trend, which is the thing no single reading can show you. In the sample above consumption falls from 88 kWh to 71 across five weeks as the weather turns, then edges back up to 74. Average consumption sits just under 80 kWh a week, and the sum tells you where the year is heading — multiply it out and you have an annual figure to hold a tariff against.
The weeks that stick out are the ones worth a note. A cold snap with the electric heater on, a fortnight away with the fridge running and nothing else, the week you finally ran the dishwasher on eco. Write one sentence in the notes field and the number has a reason attached to it, which is what turns a log into something you make decisions from rather than just a column of figures.
Questions
Frequently asked
What happens to the first reading?
It has nothing before it, so its consumption stays blank. That is deliberate — a zero there would be a lie, and it would drag your average down. From the second reading on, every entry has a number.
Can I keep gas and water in the same log?
Keep one log per meter. The formula looks at the previous entry of that log, so a gas reading filed between two electricity readings would be subtracted from the wrong number. Give all three logs the tag "home" and the overview keeps them together.
Does it matter if I read the meter on a different day?
No. The log subtracts the previous reading whenever it was taken, so a Monday instead of a Sunday is fine. Only a skipped week shows up, as one larger figure rather than two.
Can it tell me whether I am using more than last week?
Yes. "Change in consumption" is a second formula that compares this week's consumption with last week's: minus 8 means 8 kWh less. It needs two consumptions to compare, so it starts on the third reading.
Can I see what it cost rather than what I used?
Add a number field for the price per kWh and the log can carry a second formula that multiplies the two. Or add the amount from the bill as its own field when it arrives; the readings and the invoice then sit in the same log.
