vitatrace.

Two health apps with statistical analysis.
Offline. No account.

AllergyTrace · MediTrace
Statistical correlation analysis for symptoms, allergens and medications. Data stays on your phone.

Why it exists

My daughter wasn't properly diagnosed with coeliac disease for a long time. Symptoms came and went, and nobody recorded them in a form that would have made statistical patterns visible. At the same time, I'm taking several supplements plus one prescribed medication myself, and my doctor asked: "Is it helping?" I only had a hunch.

From both situations I wanted tools that did what was missing: structured tracking plus real statistical analysis, without health data sitting in someone's cloud.

My name is Dumeni. Software developer, solo. Based in Ilanz, Graubünden, Switzerland.

The two apps

Allergies · Intolerances · Coeliac

allergytrace

Track allergen exposures (pollen, food with brand and amount, animals, chemicals, medications) and symptoms on self-defined 0–10 scales. After 2–4 weeks of data: statistical correlation analysis between exposure and symptoms, plus optional evaluation of whether relief medication actually helps.

• 136+ predefined allergens to choose from
• 58+ relief medications with CH/DE brand names
• 3 analysis levels: simple · detailed · scientific (OLR, Cohen's d, p-values)
• Cross-allergy warnings from a curated database (e.g. birch → apple, hazelnut)
• PDF export for allergist consultations

⇩ Google Play ⇩ App Store → Methodology

journal allergens relief analysis
simple analysis
detailed analysis
scientific settings

▸ Screenshots — swipe, click to enlarge

Medications · Supplements · Vitals

meditrace

Track medication and supplement intakes plus fully customizable fields. The app statistically evaluates which substances measurably work for you — with pharmacologically correct time windows: ibuprofen works within hours, an antidepressant may take weeks. MediTrace knows this.

• 448 medications and supplements incl. international brand names
• Pharmacokinetic database: onset, peak, duration and buildup time per medication
• Vital-sign effect (Pro): shows how a medication affects blood pressure and pulse — side effects become visible too
• Dose–response analysis: does a higher dose work better? The app shows you.
• Fully customizable symptoms and measurements
• One clear, statistical analysis (ordinal logistic regression / long-term trend) — no contradictory statements
• PDF report for the doctor — in 4 languages, with statistics, charts and the full diary

⇩ Google Play ⇩ App Store → Methodology

daily
log medications drug
profile vitals analysis
start analysis
summary effect
detail scientific
detail

▸ Screenshots — swipe, click to enlarge

Shared methodology

Both apps use the same statistical core. A separate model is computed per symptom field (no averaging across multiple symptom areas). Lag times are picked automatically from pharmacokinetic or allergological data. Results are meant as hypotheses for a doctor's visit, not as a diagnosis.

• Day comparison (quick analysis): mean comparison (days with vs. without exposure/intake), t-test, Cohen's d — for fast-acting triggers. Both apps pick the method automatically per field.
• Scientific mode (OLR): ordinal logistic regression with features for exposure/intake, intensity, weekday, co-exposures or other substances. 5-class model (compressed from 0–10).
• Confidence levels: not_evaluable → preliminary → reliable, depending on sample size and effect size

The apps do not provide a diagnosis. They deliver statistical hints for discussion with healthcare professionals. Correlation ≠ causation — explicitly flagged in scientific mode.

For healthcare professionals

Both apps produce clinically readable PDF reports that patients can bring to consultations — with effect sizes, p-values, confidence levels and transparent methodology.

What your practice gets

• Structured patient data instead of anecdotal accounts
• Statistical correlations between triggers and symptoms
• Overview of relief and medication effects
• Patient keeps data sovereignty — everything stays offline on the phone

What it costs

Each app has three tiers. Free is free and account-less — Standard and Pro prices differ slightly between the apps.

Frequently asked questions

If you try one of the apps and have feedback — please reach out. Honest criticism more than praise. vitatrace@proton.me.

Privacy

As of: May 2026

Responsible entity

SilvaGIS GmbH, Via Quinclas 9, 7130 Ilanz, Switzerland.
Contact: vitatrace@proton.me

What data we collect

None. Neither AllergyTrace nor MediTrace has a server or transmits health data off your device. Symptom entries, medication logs, allergen exposures and analysis results live exclusively in the local SQLite database on your device.

Permissions

• Biometrics — only if you enable app lock
• Notifications — only for local tracking reminders
• Storage — for import/export of JSON backups

Analytics, ads, tracking

None. No analytics SDKs, no ads, no social-login integrations, no crash reporter with PII.

In-app purchases

Standard and Pro subscriptions are processed via Google Play (Android) or the App Store (iOS). The respective store handles the transaction. The apps only receive an encrypted entitlement status via RevenueCat — no personal data.

Website tracking

This website logs anonymous page views (path and referrer) via the self-hosted backend admin.silvagis.ch — no Google Analytics, no Plausible, no third party. No cookies.

Your rights

Since the apps store nothing that isn't on your device, most access, rectification and deletion rights don't apply. Uninstalling the app deletes all local data.

Legal notice

SilvaGIS GmbH
Via Quinclas 9
7130 Ilanz, Switzerland

Email: vitatrace@proton.me
Commercial register: CHE-490.942.935 (Canton of Graubünden)

AllergyTrace and MediTrace provide statistical hints based on self-tracking data. They do not replace medical diagnosis or advice. For medical decisions — especially changes to medication — always consult a doctor.