Who builds Pain Journal

Who builds it

Pain Journal is built by one person: Mateusz Olszewski, a software developer, trading as Vizaxis Mateusz Olszewski, a sole proprietorship registered in the Polish CEIDG business registry. No hospital group, no pharmaceutical company, no investors, no agency behind it.

• Publisher and data controller. Vizaxis Mateusz Olszewski, ul. Dworcowa 22 lok. 32, 10-437 Olsztyn, Poland. VAT ID (NIP): 5711684432. Registered in CEIDG.
• Contact. contact@vizaxis.com. Replies come from the same person who writes the app.
• Published as "Pain Journal: Symptom Tracker" on the App Store (id 6761018971) and Google Play (com.vizaxis.painjournal).

And the part that belongs here just as much: I am not a doctor and I have no medical training. That is precisely why the app makes no medical claim of any kind. It does not diagnose, it does not recommend, and it does not tell you what your pain means. It records what you enter, summarises it (averages, a trend line, how often a trigger coincided with worse days) and lays it out so a clinician can read it in a minute. What follows from it belongs in the consulting room and nowhere else.

What the app was built on

The starting point is a question every appointment asks: "How has your pain been since last time?" Weeks sit in between, bad days blur into good ones, and what is left is an impression rather than an answer. The app exists for that one gap.

• The fields it records are the standard fields of a pain diary, not an invention. Location on a body map of 39 zones, left and right kept separate; intensity on a 1 to 10 numeric scale; pain type; sleep quality; medications with dates; free notes. The things a consultation asks about anyway.
• The interaction follows from why pain diaries get abandoned. They are not dropped because people do not want to document, but because logging takes too long on a bad day. So an entry is made by tapping rather than typing, and takes under a minute.
• The report was revised against real reports, not against a wish. Two things were cut in the process: a percentage column that fakes precision at low entry counts ("50%" from one of two entries prints identically to "50%" from 200 of 400), and a body-map shading that encoded rank only, so an area tapped once looked as alarming as one tapped daily. It now states in how many of how many entries an area appeared, on a fixed, labelled scale.
• What is deliberately missing. No condition score, no index, no prediction, no AI drawing conclusions from entries. The app computes descriptive statistics over what you logged (averages, a trend line over the period, how often a trigger coincided with a worse day) and prints them with their counts; it does not turn them into a diagnosis or a recommendation. A number that looks like a measurement without being one does more harm than good in a short appointment.

Not a medical device, and staying that way

The intended purpose of Pain Journal is documenting and summarising what the user enters. It has no diagnostic, therapeutic or monitoring purpose, which is why it is not a medical device under Regulation (EU) 2017/745. That is not a gap waiting to be closed, it is the decision itself: the moment an app assesses, interprets or predicts, it is something else, and it would then need evidence nobody here has. The notice appears in the app, on the doctor report, on the printable template and on every page of this site.

How it is funded

For a patient organisation this is usually the decisive question, so here it is in full: Pain Journal is funded entirely by its own users.

• No advertising, no sponsorship, no pharmaceutical funding, no data sale, no investors. There are no advertising SDKs in the app and no business model in which data reaches a third party.
• The only revenue is an optional paid upgrade: full history depth, 30-day, 90-day and custom report ranges, the report's chart, per-area and medication tables, the Insights screen, CSV export, cloud backup, and the removal of the free tier's limits (one condition, three medications, three custom triggers).
• Permanently free are unlimited entries (one tracked condition, up to three medications and three custom triggers), the body map, reminders, and the doctor report covering the last seven days: summary, body-map heatmap and the day-by-day log, with no credit system and no per-export fee. It is not a trial and it does not expire.
• With no app at all, there is a printable pain diary template: two A4 pages, no email address, no registration.

What happens to the data

• Entries stay on the device. There is no account, no registration, no email address and no password. There is no server where pain entries could sit, so there is nothing to look at, even in a support case.
• Cloud backup is optional, paid and off by default. When it is switched on, the backup goes to your own iCloud (iPhone, iPad) or to the private app folder of your own Google Drive (Android), not to us.
• Usage statistics and crash reports run in the EU, EEA and UK only after explicit consent, asked at the end of the welcome flow; until then nothing is sent, and it can be withdrawn at any time in Settings. Outside the EU, EEA and UK they are on by default under legitimate interest and can be switched off in the same place. Those events carry no pain ratings, body areas, pain types, medication names, symptoms or notes. That data does not leave the device.
• No cross-app tracking. No advertising identifier (IDFA), no linking with third-party data for advertising.

The GDPR data controller is Vizaxis Mateusz Olszewski, at the address above. The full Privacy Policy lists every service used, the data it processes, the legal basis and the retention period, one by one. Questions go to the same address: contact@vizaxis.com.

What you can check before recommending it

• App facts: what the app does, what is free, what the report contains, written to be quoted.
• For clinicians: the same question from a practice's point of view.
• Privacy Policy and Terms of Service.
• The store privacy declarations, independent of this site: App Store and Google Play.
• The printable template and the appointment guide, both open, with no app and no address required.

If something is missing here

If your organisation needs a fact for a recommendation that this page does not state, write to contact@vizaxis.com. It will go on this page, not just into a reply to you.

Pain Journal is a personal pain diary. It is not a medical device and does not provide medical advice, diagnosis or treatment. Talk to a clinician about your treatment.