A bowel diary for your everyday patterns

bellySignal is a bowel movement and hydration tracker for iPhone and Android. Record stool form with the Bristol scale, urine color, water intake, and food and habits in one diary. Review your trends and export a PDF of the last 90 days to discuss at an appointment. No account is required to keep a diary.

bellySignal Android home screen with a weekly calendar, gut status, hydration progress, and sample daily records.
Android home screen · Sample records
Platforms
iPhone (iOS) and Android
Getting started
Free download; no subscription needed to start logging
Account
Optional sign-in; recording works without an account
Health records
Local diary; selected health values also sent to analytics

What you can keep in your diary

Bowel movements

Choose a Bristol stool type from 1 to 7 and record color, blood or mucus you notice, and symptoms such as pain or bloating. Use the same fields each time to make your entries easier to compare.

Urine color and water

Log urine color and water intake alongside your bowel records. Set a daily water goal and see how much you have logged. These entries are observations, not a diagnosis of hydration or illness.

Food and habits

Record coffee, alcohol, dairy, spicy food, stress, poor sleep, and other possible triggers. Look back at what happened around changes in your digestion without assuming that a food caused them.

Trends and PDF reports

Review your records over time. From Settings, export a PDF summarizing the last 90 days and choose whether to share it. The report can support a conversation with a clinician; it does not interpret symptoms for you.

How to start a bowel diary

  1. Download bellySignal from the App Store or Google Play and start without signing in.
  2. Use the add button to record a bowel movement, urine color, water, or food and habits.
  3. Return to Trends to review your entries. Export a PDF from Settings when you want a summary.

How records and analytics are handled

Your diary is stored on your device, and no account is required. Selected health values, including stool type, symptoms and manually entered weight, are also sent to PostHog and Firebase Analytics. Both services are enabled by default. The analytics switch controls PostHog only; Firebase Analytics remains active. Exports and health-platform integration are optional. See the privacy policy for the full data-handling notice.

Privacy policy

Know what the app can tell you

bellySignal is a self-recording tool. It does not diagnose IBS, food intolerance, dehydration, or other conditions, and an association in your diary does not establish a cause. It does not replace medical advice or provide a treatment plan. Signing in does not currently sync your diary between devices.

Learn more about keeping records

Frequently asked questions

Where can I download bellySignal?
bellySignal is available for iOS on the App Store and for Android on Google Play.
Where are my health records stored?
Your diary is stored on your device, and no account is required. Selected health values, including stool type, symptoms and manually entered weight, are also sent to PostHog and Firebase Analytics. Both services are enabled by default. The analytics switch controls PostHog only; Firebase Analytics remains active.
What can I record?
You can log stool type and color, any blood or mucus you notice, urine color and persistent foam, water intake, and foods that may affect your digestion.
Can I start for free?
Yes. You can start using bellySignal without an account or a subscription.
Can bellySignal give me a diagnosis?
No. bellySignal helps you keep records and notice patterns over time. It does not replace medical advice or diagnosis.