To keep a daily energy log, rate your energy a few times a day on a simple scale, tag what you were doing, and after about a week look at which activities line up with your highs and lows. I built Energy Battery to do exactly this. You drag a slider from red to green, tag the moment, and it turns your logs into a ranked list of what charges you and what drains you.
Quick disclosure before we go further: Energy Battery is mine. I built it and I run it. Logging is free, and the pattern screen is part of a paid tier I’ll get to. This is me showing you the tool I built for my own brain, not a pitch dressed up as a review.
I was already tracking my energy. In my head. Badly.
For years I ran a mental energy journal. “That meeting wrecked me.” “That walk helped.” “Why am I useless every day at 3pm?” I noticed these things constantly, and by the next morning every one of them was gone.
I never tried an app or a journal for it. I just kept winging it and losing the data. Notes in your head don’t add up to anything. So I built the thing I knew would help me: somewhere to dump those observations fast, so they’d stop evaporating overnight.
The log takes about two seconds
Here’s the whole habit. Open the app, drag a slider from red to green to match your energy, tag what you were doing. Done.
There’s a little firefly mascot named Glow whose tail lantern fills and glows with your energy, and a streak bar to keep you coming back. It’s cute on purpose. Two seconds and cute is the difference between an app I keep opening and one I abandon, at least for my ADHD brain.
The same trick runs my habit app. Dopamine Dealer Habits keeps the daily cost tiny so the streak survives when you don’t feel like it.
What actually charges you and what drains you?
After you’ve logged for a while, the Patterns screen ranks your activities by what they do to your energy. Charges on one side, drains on the other, pulled from your own logs by activity, time, and weekday. This is the payoff screen, and it’s the Pro feature.
It’s also the screen where the app told me something I didn’t know about myself.
Talking to people charges me. Even a quick phone call. I’d have bet money a ringing phone was a drain. It sat there in my charges column anyway, log after log. I’d never have caught it on my own, because I wasn’t writing anything down. The pattern had to show me.
That’s the moment I built the app for: the point where your own data tells you something your gut had wrong.
Why does it take a week to be useful?
The thing I’d flag before you try it: on day one there’s nothing to read yet. Log twice and quit, and the app has nothing to compare. Give it about a week of logs before the results say something real about you.
That’s the reason the log is two seconds. You only get an answer if you keep going long enough, so the daily cost has to be almost nothing.
I’ll be straight about my own usage too. I logged hard for a few weeks, drifted, and now I dip back in when my energy feels off and I can’t work out why. What it found the first time still holds. The phone-call thing changed how I plan my schedule, and I learned it for the price of a week of two-second check-ins.
Who is a daily energy log for?
This is for the tracker crowd. If you already log habits or moods and you’ve never pointed a tracker at your energy specifically, this is the missing one. It’s for anyone who keeps noticing “that wrecked me” and “that helped” and never writes it down anywhere.
It doesn’t take a diagnosis or a fancy system to start.
What does Energy Battery cost?
| Plan | What you get |
|---|---|
| Free | Unlimited check-ins, tags, Glow the firefly, streaks, and your last 7 days of logs. |
| App Hub Pro, $7/month, $59/year, or $119 once | The Patterns screen, your full history, and weekly recap emails. One Pro covers all five of my apps, not just this one. |
An energy log is only useful if it shows you something you didn’t already know about yourself. That’s my whole bet with this app: a handful of quick check-ins, and one thing in your charges column you’d have gotten wrong.
Log your energy for a week
Start today, log whenever you notice a high or a low, and see what turns up. My money says at least one thing in your charges column surprises you. Free, no card needed.
Energy Battery is part of my App Hub, where the rest of my little apps live, like the subscription tracker I built for the ones I keep meaning to cancel. If you want more of my origin-story builds, here’s another tool I built to fix a problem I kept hitting, the bill payoff tracker I built to gamify my side income, and the rest live in Digital Products.
Frequently asked questions
How do you keep a daily energy log?
Rate your energy on a simple scale a few times a day and note what you were doing at the time. After about a week, look for activities showing up next to your highs and lows. Energy Battery does this with a two-second slider log and builds the pattern for you.
How do I figure out what drains my energy?
Track it instead of guessing. Log your energy level and activity a few times a day for a week, then compare. The activities sitting next to your low logs are your drains. Energy Battery’s Patterns screen ranks charges and drains automatically from your logs, across days, times, and activities.
Is Energy Battery free?
Yes. Check-ins, tags, streaks, and your last 7 days of logs are free, which covers the first week of tracking. The Patterns screen, full history, and recap emails are part of App Hub Pro, which is $7 a month, $59 a year, or $119 once, and covers all five of my apps.
How long before an energy tracker shows real patterns?
About a week of consistent logs. One or two entries tell you nothing. Five to seven days of check-ins across different activities gives the charges-vs-drains ranking enough to be meaningful.
Is this an ADHD tool?
It’s not ADHD-specific, but I have ADHD and built it to survive my own brain: a two-second log, a mascot, and a streak. If energy tracking has failed you before because the logging took effort, this is built for exactly that.
A tool I built
Energy Battery
Log your energy through the day and watch your battery fill, so you can see what actually charges you and what drains you.
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