A Private 3-Day Bladder Diary That Stays on Your Phone

Before anything else: Waterline is not medical advice and does not replace a doctor or nurse. It only counts and adds up what you write down. If you have blood in your urine, a fever, pain or burning, cannot pass urine, or have leaking that is new or getting worse, see a doctor soon instead of waiting for a diary. Waterline is a notebook for the three-day bladder diary many urology and gynecology visits ask for.

Read this guide in: English · Español · Português · Bahasa Indonesia · Tiếng Việt · Français · Deutsch · Italiano · 日本語 · 中文 · 한국어 · ไทย · Filipino · हिन्दी · العربية

The problem

Doctors often hand out a paper chart and ask for three days of notes: how much you drink, when you pass urine and how much, any urgency, any leaks. Urgency and leaking affect a great many people, yet they are hard to talk about, so many put off the visit. A paper chart at work is awkward and easy to lose, and health apps often ask for an account. Waterline keeps the diary on your phone, with no sign-up, and prints the pages when you are done. It never tells you what the numbers mean, because only a health professional can.

How Waterline (Bladder Diary) works

• Open Waterline, read the short note that comes first and tap I understand. Then tap Start a 3-day diary and check your wake-up and sleep times.
• Tap Drink, Pass urine, Leak or Urge. Tap an amount or a strength and you are done: the time fills in by itself. If you can, use a measuring jug; if you did not measure, tap Not measured.
• Waterline splits the days from your wake-up time and counts what happens at night by the sleep hours you set. Open the summary at any time to see day and night counts, totals and the largest single amount.
• When the three days are done, save the pages as a PDF or print them and bring them to your appointment. Nothing is stored anywhere but your phone.

What you get

• Two taps for each noteFour big buttons: drink, pass urine, leak and urge. Tap one, then an amount in millilitres or cups, or a strength from 0 to 4. The time fills in by itself, and you can change it if you are adding something late.
• Day and night countsEach diary day starts when you wake up and lasts 24 hours. Passing urine during the sleep hours you set is counted as night, and the summary adds up the amounts, the largest single amount, leaks and urges by day. It shows numbers only and never says whether they are normal.
• Pages to printA PDF with one page for each of the three days, in hourly rows from your wake-up time, with a totals row and a summary on the last page. Print it or save it. The free version adds a small Made with Waterline note at the bottom of each page.
• Discreet and easy on the eyes at nightPick a neutral name and icon such as Diary or Notes, and use the dark night mode when you write a note in the middle of the night. A neutral name is a convenience, not security: it does not hide the app from someone who opens your phone.
• Pro, for $1 oncePro lets you keep as many diaries as you like, each with its own name, compare two diaries side by side such as before and after, put a real passcode on everything (AES-256) and print PDFs without the small note. Not a subscription, with a 7-day refund.

Private by design

Your diaries are kept only in this browser on this device. There is no account and nothing is sent to us or anyone else. The only time Waterline goes online is when you type a Pro key, and then only the key is checked, never your diaries. Without a passcode the data is not encrypted on the device, so clearing site data or losing the device without a backup file loses it. The Pro passcode encrypts everything with AES-256, and if you forget it nobody, including us, can open it. Waterline sends no notifications: the optional reminder is a plain calendar file that never says what it is for, and your calendar does the reminding.

Free vs Pro