How focused can I be right now?
Moderate
See your predicted focus level throughout the day and identify your strongest windows.
Your focus has a rhythm
Know when your brain is ready to focus.
Focus Battery helps you find your strongest hours, plan demanding work around them, and recognize when it’s time to stop pushing and recharge.
Built for deep work, studying, ADHD, and anyone curious about how their focus changes throughout the day.
Stop treating every hour like it should feel the same.
Your ability to focus changes throughout the day. Some hours are naturally better for demanding work. Others are better for lighter tasks, breaks, or recovery.
Focus Battery helps you see that pattern — so you can stop guessing when to push and when to recharge.
- MorningWarming up
- Peak windowBest time for deep work
- Afternoon dipSwitch to lighter work
- RecoveryStop forcing it
How it works
Your focus, explained in seconds.
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01
Connect Apple Health
Grant access to your sleep data. Focus Battery reads sleep duration and stages — nothing else.
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02
Set your chronotype
Tell the app whether you're an early bird or a night owl. Your body clock shapes your focus windows.
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03
Get your daily forecast
Every morning, see a personalized focus energy curve for the day — peak hours and low-energy dips included.
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04
Work with your energy
Schedule deep work during peak focus windows. Save light tasks for low-energy periods. Stop fighting your biology.
The core product
Your day, at a glance.
Focus Battery turns your daily rhythm into three simple signals.
When should I do demanding work?
4:00–7:00 PM
Use your predicted peaks for deep work, studying, creative work, or anything that needs sustained attention.
How much do I have left?
48% Focus Battery
See your estimated remaining mental energy — and recognize when continuing to push may no longer be worth it.
The key difference
Two signals.
One better decision.
Focus Forecast
When can I focus best?
Your forecast maps how your ability to focus may change throughout the day based on factors such as your sleep, chronotype, and routine.
Use it to decide when to tackle demanding work.
Focus Battery
How much mental energy do I have left?
Your battery gives you a simple estimate of how much focus capacity remains as the day progresses.
Use it to decide how much longer you should keep pushing.
Peak focus doesn’t always mean unlimited energy.
You can be in a good focus window and still be running low. That distinction is what makes Focus Battery useful.
What shapes your focus
Your focus doesn’t happen in isolation.
Sleep. Daily rhythm. Medication. Your current state. Focus Battery brings those signals together so you can start noticing what changes the way you work.
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Sleep
See how your sleep compares with your estimated sleep need and how your days differ when you recover better.
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Medication
If you take ADHD medication, log its timing and compare it with your daily focus pattern.
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Focus Tests
Use short cognitive tests to check reaction speed, accuracy, and impulse control — giving you another view of how sharp you feel right now.
From prediction to action
When the window opens, use it.
Knowing your best hours is only useful if you actually protect them. Start a Focus Session during a strong focus window and give the task your full attention.
- Built-in timer.
- Focus music.
- No complicated productivity system.
Just a clear block of time for the work that matters.
Learn your patterns
One day is useful. Patterns are better.
Your Journal turns daily signals into longer-term trends.
Compare your Focus Battery across days, weeks, and months. See how much you slept. Notice which days felt stronger — and start understanding what your best routines have in common.
Who it’s for
Built for minds that do demanding work.
Students
Find your best hours for studying instead of forcing another unproductive late-night session.
Knowledge workers
Protect your strongest cognitive hours for deep work instead of spending them on meetings and email.
People with ADHD
Make changing focus levels more visible and compare your daily rhythm with factors such as sleep and medication timing.
The curious
You don’t need a productivity problem to want to understand how your mind works.
Focus Battery isn’t about squeezing more work out of every hour. It’s about learning which hours are actually worth using.
Privacy
Your brain is personal. Your data should be too.
Focus Battery uses Apple Health permissions only when you choose to provide them. Sensitive health inputs are used to personalize your experience, not to build an advertising profile.
- No ads.
- No selling your health data.
- You control your permissions.
What is Focus Battery?
Focus Battery is a focus tracking app for iPhone that estimates your daily mental energy based on your sleep, chronotype, and screen time — so you know exactly when to do deep work and when to rest.
Is it useful for ADHD?
Yes. Many users with ADHD find it especially helpful because focus energy is harder to predict and manage. The app surfaces your best focus windows so you can plan around them rather than forcing productivity at the wrong times.
Does it read my personal health data?
Focus Battery reads sleep data from Apple Health with your permission. It never writes to HealthKit, never stores your data on external servers, and never shares it with third parties. Everything stays on your device.
Is Focus Battery free?
The core focus tracking features are free. An optional Focus Battery Pro subscription unlocks advanced insights and personalization. No ads, ever.
Which devices are supported?
Focus Battery is available on iPhone and requires iOS 16 or later. Download it from the App Store.
How accurate is the focus forecast?
The forecast improves as the app learns your patterns over time. It combines sleep quality, your chronotype, and usage data to build a model tailored to your personal energy rhythm.
Work with your brain.
Not against it.
Find your peaks. Protect your energy. Learn your rhythm.
Download Focus Battery on theApp StoreFree to download. Focus Battery Pro is available as an in-app subscription.
Your energy is deciding your day.
Start listening to it.