
Bladder Diary: Fluid Balance
Pee tracker & voiding log
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Free
In-App Purchases
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About
Keeping a bladder diary probably isn’t the most exciting part of your day.
So we made it take as little time as possible.
Intake → amount.
Output → amount.
Two taps. Logged.
Fluid Balance is built for a simple bladder diary over a few days — usually 3–7, or longer if needed. Log as you go, see the full picture, and share it with your doctor when you’re done.
TWO TAPS. DONE.
Tap Intake or Output, then choose an amount.
That’s it.
No required notes. No questionnaires. No long forms.
Log from your iPhone, Home Screen widget, or Apple Watch.
Not sure about the exact amount? Estimate it. Consistent entries are usually more useful than trying to remember everything at the end of the day.
YOUR WHOLE DAY AT A GLANCE
Open the app and immediately see:
• total intake
• total output
• current balance
• every entry from the day, in order
Edit or delete any entry in seconds.
If needed, you can also track urgency on a scale from 0 to 4.
A REPORT FOR YOUR DOCTOR
Choose any date range and create a PDF report.
It brings together voided volumes, times, daily totals, nighttime events, and other useful bladder diary data in one place.
Print it, send it, or simply open it on your phone during an appointment.
Need the raw data? CSV export is available too.
STATISTICS
Review your diary by day and explore your data with charts for:
• intake and output
• voids per day
• nighttime voids
• time between voids
• patterns throughout the day
Just your data — without trying to judge it for you.
No “good” or “bad” days.
No goals.
No streaks.
No diagnoses.
WHY PEOPLE KEEP A BLADDER DIARY
A bladder diary may be used for nocturia, overactive bladder, incontinence, fluid balance monitoring, follow-up after treatment or surgery — or simply because your doctor asked you to keep one.
PRIVATE BY DEFAULT
No account or sign-up required.
No ads. No third-party trackers.
Your entries stay on your device and, if you use iCloud, in your private iCloud database.
FREE + PRO
Free includes:
• unlimited logging
• daily summary
• diary calendar
• basic chart
• CSV export
One-time Pro unlocks PDF reports, advanced statistics, and additional app features.
No subscription.
Fluid Balance is a self-tracking tool, not a medical record.
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What's New in Bladder Diary
1.2.1
October 31, 2026
Fluid Balance now supports iPhone Duo.
1
Subscriptions & In-App Purchases
$9.99
Pro
PDF report, charts and the dark icon.







