Privacy policy
Last updated 13 September 2026
StomaCompass is made by one person, not a company. This page says what the app collects, where it goes, and how to get rid of it.
The short version
- Your logs are stored under your own account on servers in Ireland (EU), and only you can read them.
- A meal photo is sent once to be read, then it is not kept, by us or by anyone.
- There are no adverts, no tracking for advertising, and your information is never sold.
- You can download a copy of everything, or delete everything, from Settings › Account in the app.
What the app collects
| Information | Why |
|---|---|
| Your email address | To sign you in. We send a six-digit code to it; there is no password. |
| Your profile: stoma type, typical transit time, approximate surgery date, timezone, how many days you wear a bag, and a first name if you give one | So the patterns the app shows are worked out for you rather than for an average person. |
| What you log: meals and the foods in them, output, drinks, bag changes, and how many photos you have scanned each day | This is the diary. It is the whole point of the app. |
| Crash reports | If the app crashes, a report of what went wrong helps fix it. See "Crash reports" below for what is stripped out first. |
The app does not collect your location, your contacts, or anything from other apps on your phone. It asks for the camera only when you take a photo of a meal.
Where it goes
Three services handle your information. No others do.
| Service | What it receives | Where |
|---|---|---|
| Supabase (account and database) | Your email, profile and logs. Each person's rows are locked to their own account at the database level. | Ireland (EU, eu-west-1) |
| Google Gemini (reading meal photos) | The meal photo, once, so the foods on the plate can be named. The photo is not stored by StomaCompass. Google processes it under its own terms, in Google's data centres. | |
| Sentry (crash reports) | Crash reports with personal details removed. See below. | EU (Germany) |
Meal photos
When you photograph a meal, the photo goes to Google's Gemini model to name the foods. The list of foods comes back and is saved in your log; the photo itself is not saved anywhere by StomaCompass. Not on our servers, and not in your account. If you want to keep the photo, keep it on your phone.
Crash reports
If the app crashes, a report goes to Sentry so it can be fixed. Before it leaves your phone, the report has photos, notes, names, foods, email addresses and request contents removed. It carries the version of the app, the type of phone, and where in the code it fell over. Nothing from your diary.
What stays on your phone
Everything you log is saved on your phone first, so the app works without a signal, and catches up with your account when you are back online. Signing out empties the copy on the phone.
Your rights, and how to use them
- Download a copy. Settings › Account › Download a copy. You get a file with everything held under your account.
- Delete everything. Settings › Account › Delete account. Your account, profile and every log are deleted from our servers straight away. This cannot be undone.
- Correct your profile. Every profile field can be changed in Settings. The foods the app names on a photo can be corrected before the meal is saved.
The rights above are yours wherever you live. If you are in the UK or the EU, UK GDPR and the EU GDPR apply as well. If you want to do any of the above and the app is not letting you, or you have a question or a complaint, email hello@stomacompass.com. You also have the right to complain to your data protection regulator; for the UK that is the Information Commissioner's Office.
How long it is kept
Until you delete it. There is no automatic deletion of a live account, because a diary is only useful if it is still there. Crash reports expire at Sentry after 30 days.
Children
The app is for adults. It is not aimed at anyone under 18.
Changes
The date at the top is the date of the last change. If something changes in a way that matters, it will be said plainly here.