Water Reminder App Without the Water Tracking 💧
P App: Science-Backed Hydration
and Water Reminder App
Tap a button on your way to pee. Get reminders based on your bathroom pattern. Form a hydration habit without logging every glass.
Quick answer
A Water Reminder App Without Logging Every Glass
P is a free iPhone and Apple Watch hydration app. Instead of recording every drink and estimating ounces, you log bathroom visits with one tap. P shows your pattern and sends water reminders based on time since your last logged visit. Compare output-based and intake-based tracking.
As Featured In
The app is thoughtfully designed, highly intuitive, and tightly integrated with Apple devices.
It’s clean and easy to navigate, but still has personality built into it.
It’s unbelievably simple.
This vital bit of information…enables the app to send you water reminders when your body needs them most.
I’ve been using it for about a week, and so far, I’m a fan.
I tap a button on my Apple Watch when I’m heading to the bathroom…I can drink whatever I want without measuring or logging any of it.
Science-Backed
Peer-reviewed research links bathroom frequency with hydration patterns.
Two-Second Simplicity
Log on your way to the bathroom. That’s it.
Habit That Sticks
Easier to remember than tracking every glass of water.
Privacy-First
Private by design. Your data is only on your device and in your private iCloud account.
Voiding Diary Context
Keep a timestamped record of bathroom patterns you can review yourself or share with a clinician. Explore the hydration and health guides.
Friends & Accountability
Stay accountable. Friends can remind each other to drink water and stay consistent.
See Where You Peed
Privately save your location with each pee. It’s like a low-effort journal of your life and travels.
Widgets
Keep an eye on your hydration from your lock screen or home screen, and log a pee in seconds.
Handwashing Detection
Forgot to log? Apple Watch helps you identify possible pees you forgot based on when you wash your hands.
Log in 2 seconds on your way to the bathroom, without taking out your phone. Watch face complications keep your daily count and bathroom pattern close at hand. Learn more about P on Apple Watch.
What Users Say
Super helpful
App is super easy to use, seamless friend invites, and cool features! Very helpful to make sure I am drinking enough water
So helpful!
I have used this every day for over 5 years and it has helped my hydration habits/caffine intake!
Great app!
I use this app all the time and just love it! Recently I was having an issue and contacted the developer about it. The response was immediate and the issue was able to be fixed. Great customer service!! 👏🏼😊
Like it so far.
Easy to use on my watch. Just what I needed.
Helpful & Easy
Extremely helpful for tracking hydration and has some very useful tools. Being able to set as an interactive widget makes it that much easier to log. I struggle to remain consistent when it comes to keeping logs. This app makes it super easy to do just that!
Great App!
I’m so glad I found this app. At my advanced age I have prostate/bladder issues and I’ve tried recording pees with a pad and pencil, but it's hit or miss. This app is easy to use especially with the Apple watch connection. Instead of telling the doctor "I seem to be having to pee very frequently", the gives you hard data that you can show to your urologist. Mine has started my on a new medication and with this I can confirm with data whether it's helpful or not. As a software author myself, I can appreciate the great job John has done creating and refining this app.
A game changer for hydration
This is such an incredible app, I’ve never missed a day since I downloaded it after a surgery 1,605 days ago to stay on top of my hydration.
Honestly, it's been so effective and has completely changed my hydration. Come rain or shine, hangover or busyness, this is always on my mind and really pushes me to stay hydrated. I always kept up with water but it really is amazing how easily that can slip. I notice more how infrequently people use the bathroom and what that must do to the body.
I use this on my phone through the app, widgets on my Home Screen, my Apple Watch (most convenient) and on my HomePods so there is always a way for me to log pees even if I’m not on a device:
Regular updates, changes and features, as a software engineer myself I can tell this is a labour of love.
Also the map showing pees around the world is so cool I love looking at that!
Backed by Peer-Reviewed Research
P’s approach is informed by studies examining associations between bathroom frequency and hydration markers.
24-h Void number as an indicator of hydration status
European Journal of Clinical Nutrition (2015)
Key Finding: Euhydrated individuals void 5±2 times vs hypohydrated 3±1 times per 24 hours
Combining urine color and void number to assess hydration in adults and children
European Journal of Clinical Nutrition (2021)
Key finding: Combining void number with urine color improved hydration classification in the study
Reliability of 24-h void frequency as an index of hydration status when euhydrated and hypohydrated
European Journal of Clinical Nutrition (2016)
Key finding: Study groups with different hydration markers also had different average void frequencies
Adequacy of Daily Fluid Intake Volume Can Be Identified From Urinary Frequency and Perceived Thirst in Healthy Adults
Journal of the American College of Nutrition (2020)
Key finding: Participants with 6 or fewer daily visits had more concentrated urine on average
Hydration for health hypothesis: a narrative review of supporting evidence
European Journal of Nutrition (2020)
Key finding: Reviews void frequency as one practical hydration-awareness signal
Development of individual hydration strategies for athletes
International Journal of Sport Nutrition and Exercise Metabolism (2008)
Key finding: Urine frequency and volume can contribute context alongside other hydration measures
Drinking water is an important part of everyday wellness. A well-timed reminder can help you build a routine, while P’s hydration and health guides explain what research says about hydration in different situations.
Tracking daily water intake can also become tedious. If you have tried a hydration tracker that asks you to log every glass, you know how easy it is to miss a drink or guess the wrong serving size.
Not a Water Tracking App
Most drink water reminder apps, like WaterMinder, Waterllama, Plant Nanny, Hydro Coach, Aqualert, and Waterbalance are water tracker apps. They ask you to set daily goals or are based on a certain water drinking schedule.
P is a different kind of hydration app for iPhone. It’s designed to be one of the easiest ways to get reminders to drink water with minimal work. You don’t need to set any water goals, use a customized cup or special water bottle, or even track your daily intake. It’s not a water tracking app at all; it’s possibly the best water reminder app.
With P, all you need to do is tap one button every time you go to the bathroom, and you’ll get a reminder to drink water when it’s been over three hours since you peed.
The Best Water Reminder App
The amount of H2O you should be drinking depends on a number of factors, like your body weight, body temperature, or the amount of physical activity you do on a particular day.
Unlike most drinking water apps, P can keep you on track with water consumption and keep you more aware of your body’s response to different foods, weather, and beverages based on your output rather than water intake. There’s a graphic display that shows stats about the average time between your pees, both in the long and short term, so you can see how you’re doing over time.
Pee tracking isn’t conventional. You won’t find the ability to track your pees in the Apple Health app or Google Fit, but P may be the best water reminder app for you. It provides relevant water reminders with minimal input.
Want to know whether it’s a great app? Check out the user reviews in the App Store.
Available for iPhone and Apple Watch
P works as an Apple Watch water tracker, letting you log from your wrist in about 2 seconds. Over 45% of recent active logging users log from Apple Watch. P is a free app available for iPhone and Apple Watch.
P was formerly called Pee & See.
In-App Events
What’s happening in P right now.
Frequently Asked Questions
How It Works
P is a free wellness app that helps you stay aware of hydration without logging every drink. You tap once when you use the bathroom. P shows your bathroom pattern and sends water reminders based on time since your last logged visit.
Research has found associations between bathroom frequency and hydration markers, but P does not measure or diagnose hydration status.
Remembering to log one bathroom visit is easier for many people than recording every glass, bottle, and serving size. Bathroom frequency can provide useful pattern context alongside other body signals.
P uses those logs for reminders and trends. It does not calculate how much water you consumed or replace medical advice.
P uses 7 daily visits as an optional wellness goal informed by studies of population averages. It is not a universal medical threshold, and reaching or missing it does not confirm hydration.
Your usual pattern can vary with activity, climate, diet, medication, pregnancy, and health conditions.
Bathroom frequency is one practical signal that research has associated with hydration markers. It does not directly measure hydration and cannot tell you how much water you drank. P is best used for personal awareness and noticing changes from your usual pattern.
No. P is designed for people who do not want to log every drink. You only log bathroom visits; P uses the timing of those logs for reminders and pattern awareness. It does not calculate how much water you drank or measure hydration directly.
P is a free app for iPhone and Apple Watch. Tap the button each time you are on your way to the bathroom. P shows your daily pattern and sends reminders based on time since your last logged visit.
After downloading from the App Store, P works immediately: no complex setup required. You can log visits from your iPhone, Apple Watch, or widgets on your home screen or lock screen.
Effective strategies include: keep a water bottle accessible throughout the day, drink a glass with each meal, set regular reminders, flavor water with fruit if plain water is unappealing, and eat water-rich foods.
P can provide reminders and help you notice your usual pattern, but it does not determine your medical fluid needs.
Research Behind the Approach
Peer-reviewed studies have examined associations between void frequency and hydration markers. P uses that research as the basis for hydration awareness and reminder timing, not as a medical measurement or diagnosis.
P focuses on output rather than intake. You log bathroom visits with one tap instead of recording every beverage and estimating serving sizes. P is a free app for iPhone and Apple Watch.
See our full comparison of hydration apps for a detailed breakdown.
Bathroom frequency can be a useful, low-effort signal for personal hydration awareness, but it is not a direct hydration test. Individual patterns vary, so focus on changes from your usual pattern and contact a clinician with medical concerns.
Health and Voiding Diary Uses
Yes. P can help you keep a timestamped log of bathroom visits. A clinician may ask for a voiding diary to understand urinary frequency and patterns.
You can share your log with a healthcare provider if they ask for bathroom pattern data. See all hydration and health guides.
Note: P is designed for personal wellness tracking. Always consult healthcare professionals for medical diagnosis and treatment.
P helps you stay aware of hydration patterns. Research has studied hydration, voiding frequency, and recurrent UTIs. For UTI concerns, talk to a healthcare provider.
Medical Disclaimer: P is not medical advice. Consult healthcare providers for UTI concerns, diagnosis, and treatment.
Yes. P helps track bladder patterns you may want to discuss with a healthcare provider. Sudden increases or decreases in bathroom frequency, nighttime pattern changes, or inconsistent daily totals can be useful context for a visit.
Yes. Clinicians may ask people to keep a voiding diary before an appointment or while discussing urinary symptoms. P can provide timestamps and pattern history, but it does not interpret those records medically.
See the hydration and health guides for research summaries and questions to discuss with a healthcare professional.
Features & Technical
Yes. P includes full Apple Watch integration with a native watchOS app. It has complications for watch faces that show your daily count and open the app for 2-second logging from your wrist.
Over 45% of recent active logging users log from Apple Watch.
Free app features:
- One-tap bathroom visit logging from iPhone, Apple Watch, or widgets
- Smart water reminders when it’s been over 3 hours since you peed
- Statistics showing average time between pees
- Hydration calendar view
- Apple Watch app with complications
- iPhone widgets (lock screen, home screen)
- iCloud sync across all your devices
- Friend water reminders & leaderboard
- See Where You Peed map view
- Streak tracking
Premium Features (optional subscription):
- Add notes to pees (amount, urgency, color, etc.)
- Calendar for older months
- Stealth Mode (hide “pee” throughout app)
- CSV export for sharing with doctors
- Custom app icons
- Reminder customization
- Snooze reminders
Yes. P is designed with privacy-first principles. Your data is stored on your device, and backed up and synced privately to your iCloud account in a way that it can’t even be accessed by the developer of the app. It can’t be sold to third parties or used for any other reason by anyone else.
Yes. P reads handwashing events from Apple Health to help you catch bathroom visits you may have forgotten to log. When your Apple Watch detects handwashing, P can prompt you to confirm whether it was a bathroom visit.
This is an optional feature that can be enabled/disabled in P’s settings. P does not write any data to Apple Health.
Pricing & Download
Yes. P is a free app with no ads or time limit. Bathroom logging, reminders, Apple Watch support, widgets, streaks, friends, and current-month tracking are free.
An optional subscription adds more customization and data features.
Premium subscription unlocks additional customization and data features: add notes to pees, calendar for older months, Stealth Mode, CSV export, custom app icons, reminder customization, and snooze reminders.
Subscription options: Monthly, yearly, or lifetime. All support Family Sharing.
Download P free from the App Store. Search “p app” or get it here. Requires iPhone running iOS 17 or later. Also available for Apple Watch (requires watchOS 8+).
After downloading, the app works immediately: no complex setup, no account creation required.
Guides & Resources
- Bladder Health Awareness Month · May 1 - 31, 2026
- Summer with Friends · June 1 - 30, 2026
- Nurses Week · May 6 - 12, 2026
- Spring Into Hydration · April 1 - 30, 2026