Private Bowel Tracker
Stays on your device only. No account. No cloud sync.
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How the Tracker Works
This tracker stores your entries in your browser's localStorage - a built-in browser feature that holds small amounts of data locally on your device. No data is transmitted to any server. The tracker has no backend, no database, no analytics on your bowel entries, and no ability to identify you. When you add an entry, it goes directly into your browser's local storage and stays there until you delete it or clear your browser data.
This is a deliberate design choice. Your bowel pattern is personal health information. We do not want it, and we have built the tracker so that we cannot access it even if we tried. The CSV export feature allows you to take your data with you - print it, email it to your GP, or import it into a spreadsheet for your own analysis.
Using the Tracker Before a GP Appointment
Tracking your stool type for two to four weeks before a GP appointment significantly improves the quality of information you can share. GPs and gastroenterologists often ask "how often do you have diarrhoea/constipation?" and patients frequently underestimate or overestimate frequency. A timestamped log removes this uncertainty.
The Rome IV diagnostic criteria for IBS, which your GP may use, require knowing the proportion of your stools that fall into types 1-2 (constipation-predominant) and types 6-7 (diarrhoea-predominant) over a representative period. Two weeks of consistent logging gives enough data to compute this distribution.
Export the CSV from the tracker, print it or open it on your phone, and bring it to your appointment. This takes 30 seconds and can save significant time in the consultation.
Limitations and Important Notes
This tracker is a self-report tool. The accuracy of its output depends entirely on the accuracy of your entries. It does not diagnose any condition, does not communicate with any medical system, and is not a medical device. It is a structured diary.
Because data is stored in localStorage, it is browser-specific and device-specific. Entries made on Chrome on your phone will not appear in Safari on your iPad. If you use multiple devices, export and backup your data regularly. Clearing your browser cache or browser data will permanently delete your tracker entries with no recovery possible.
If you are in a care setting and logging patient data, use your organisation's clinical record system. This tracker is not appropriate for clinical documentation and does not meet care record governance requirements under UK law.
When Is Tracking Worth It?
Tracker FAQ
Does the tracker work in incognito / private browsing mode?
Entries added in incognito/private browsing are stored only for the duration of that session. When you close the incognito window, all data is deleted. Use your regular browser to retain entries between sessions.
Does it sync across my devices?
No - this is deliberate. Syncing requires sending your data to a server, which would mean your bowel pattern leaving your device. The tracker is local-only by design. If you want data on multiple devices, export the CSV from one device and you can reference it on another.
How much data can it store?
Browser localStorage typically allows 5-10MB per domain, which is enough for thousands of tracker entries. A typical entry is around 100-200 bytes. Even daily logging for 10 years would use less than 1MB. Storage is not a practical concern.
Is the tracker GDPR compliant?
Because no data ever leaves your device and we have no access to it whatsoever, GDPR does not apply - there is no data processing by us. Your entries are as private as a paper diary locked in your home. We cannot receive a subject access request for data we do not hold.
See also: IBS Stool Chart Guide - how to use tracker data to identify your IBS subtype under Rome IV criteria.
Updated April 2026