App Privacy Policy
Last updated: 12/10/2026
Last updated: 12th October 2026
The short version
Everything you record in Flarelight stays on your device. We can't see it. Your check-ins, flares, symptoms, notes and photos are stored in the app's own storage on your phone and are not sent to us or to anyone else.
Who we are
Flarelight, 124 City Road, London, EC1V 2NX Contact: hello@flarelight.app
Registered with the UK Information Commissioner's Office under number ZC245338. We are based in the United Kingdom. UK data protection law applies to us wherever you live. If you are in the United States, our Consumer Health Data Privacy Policy sets out additional rights you may have.
What the app stores on your device
- Daily check-in entries: energy, pain, mood and sleep ratings, and how long you slept
- Flare entries: dates, duration, severity, symptoms, and any notes you add
- Rash entries, including any photographs you choose to take or attach
- Appointments, medications and reminders you enter
- Notes and goals you write for the appointment preparation feature
Where your information is stored
Flarelight has no account and no server. Nothing you record is sent to us, and we have no way to see it. It is stored on your phone, by the app, and that is the only copy we are involved with.
Phone backups
If you have your phone’s backup switched on - iCloud Backup on iPhone, or Google’s backup service on Android - your Flarelight information is included in it, in the same way as the rest of your phone. That backup belongs to you and is held by Apple or Google under your own account, not by us. We have no access to it.
This means that if you set up a new phone from your backup, your Flarelight history and your rash photos come back with it. If you do not back your phone up, and you lose it or delete the app, the information is gone and we cannot recover it for you.
If you delete Flarelight, the information it stored on your phone goes with it. A copy may remain in your phone’s own backup until that backup is replaced. Removing it from there is done through your Apple or Google account settings, not through us.
Photographs
Photographs you add are stored by the app on your phone, and are included in your phone’s backup as above. They are not added to your phone’s main photo library unless you put them there yourself. If you delete a photo in the app, it is removed from the app’s storage.
Taking a copy of your information
You can export your information at any time from Settings. It is saved as CSV and JSON files, with your rash photos included unless you turn that off, and you choose where it goes. Anything you do with that file afterwards is up to you.
# What we receive
Nothing you log. We do not operate a server that receives your health information, and the app has no accounts or logins.
Separately from anything you log:
- App stores. If you buy a subscription, Apple or Google handles the payment. They tell us that a purchase happened and give us anonymous aggregate sales data. We never see your card details, and they do not tell us what you have recorded in the app.
- Crash reports. Crash information can reach us in two ways. First, if you've allowed your device to share diagnostics with app developers (in your iPhone or Android settings), Apple or Google send us standard crash reports. Second, if you turn on crash reporting in Flarelight's settings, the app sends technical crash details to Sentry Functional Software, Inc., our error-monitoring provider — device model, operating system version, app version, and technical details of the error. Neither includes anything you've logged: no symptoms, flares, check-ins, notes or photos. Reports sent to Sentry are stored in Frankfurt, Germany and kept for 90 days. Crash reporting to Sentry is off by default, and you can turn it on or off at any time in Settings.
- Emails you send us. If you contact support, we hold your email and your message.
What the app does with your information
Flarelight displays what you have recorded. The calendar shows your entries by date. The Insights screen shows relationships between entries you have logged — for example, showing your sleep ratings alongside the days you recorded a flare. The appointment report gathers your entries from a period you choose into a document you can share with your clinician.
Flarelight does not diagnose anything, does not predict anything, and does not identify the causes of your symptoms. It shows you your own records.
Sharing
We do not sell your data. We do not share it for advertising. There is no advertising in the app. We don't use advertising trackers or analytics SDKs. Two third-party services are built into the app: Sentry, used solely for opt-in crash reporting as described above, and OpenWeatherMap, which provides the weather shown in the app. Neither is used for advertising, tracking or analytics.
Weather. The weather feature is off by default. If you turn it on, Flarelight sends your device's approximate location directly to OpenWeatherMap to retrieve local conditions and a forecast. This goes straight from your device to OpenWeatherMap — we do not operate a server that receives or stores it. OpenWeatherMap's own privacy policy governs how they handle that request.
Your rights
Because your health information is held on your device and not by us, you already have direct control over it: you can view, edit, export and delete any entry inside the app, and deleting the app removes it from your phone.
For the limited information we do hold — support emails and purchase records from the app stores — you can ask us for a copy, or ask us to correct or delete it, at hello@flarelight.app We'll respond within one month.
Complaints
UK: the Information Commissioner's Office, ico.org.uk, 0303 123 1113.
US: your state Attorney General's office. Washington residents can complain at atg.wa.gov.
Elsewhere: your national data protection authority.
Children
Flarelight is for adults. It is not intended for anyone under 18 and we ask that under-18s do not use it.
Changes
If we change how the app handles your information — in particular if we introduce optional cloud backup or accounts in future — we will update this policy, change the date above, and tell you inside the app before the change takes effect.
If a change means your information would leave your device, we will ask you to opt in first. It will not happen automatically.