vitatrace.app · health apps · ilanz, switzerland · since may 2026
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.
→ dumeni cavegn
→ silvagis gmbh
→ vitatrace@proton.me
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+ allergens with Swiss pollen season data
- 58+ relief medications with CH/DE brand names
- 3 analysis levels: simple · detailed · scientific (OLR, Cohen's d, p-values)
- PDF export for allergist consultations
⇩ AllergyTrace
iOS to follow.
▸ Screenshots — swipe, click to enlarge
Medications · Supplements · Vitals
meditrace
Track medication and supplement intakes plus self-defined fields (pain, sleep, energy, mood, digestion). The app automatically picks the right analysis method: mean comparison for as-needed medications, before/after comparison for daily medications with a build-up phase.
- 223 medications and supplements with CH/DE/FR/ES brand names
- Pharmacokinetic database for automatic lag-time detection
- 3 analysis levels: simple · detailed · scientific
- PDF export for doctor consultations
- Pro: vital measurements (blood pressure, blood sugar, SpO2, weight, sleep) with correlation
⇩ MediTrace
iOS to follow.
▸ 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.
- Quick analysis: mean comparison (days with vs. without exposure / intake), t-test, Cohen's d
- Scientific mode: ordinal logistic regression with features for exposure, intensity, weekday, co-exposures, relief intake. 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
3-month pilot for CH/DACH practices
- Pro codes to distribute to interested patients (free of charge)
- No obligation, no contract
⇩ Request pilot
What it costs
Both apps share the same 3-tier model. The Free tier is not limited in functionality, only in the number of simultaneously tracked allergens or medications.
Free
CHF 0
No signup. No card.
- 2 active allergens or medications
- Full statistical analysis
- All custom fields
- 4 languages
Standard
CHF 3.99/month
or CHF 37.99/year
Per app. Cancel anytime.
- Unlimited allergens / medications
- Seasonal patterns (AllergyTrace)
- Full history
Pro
CHF 6.99/month
or CHF 66.99/year
Per app. All Standard features included.
- AllergyTrace: relief correlation, PDF export
- MediTrace: vital measurements (BP, blood sugar, SpO2, weight, sleep) with correlation
- Future Pro features included
Note
No lifetime tier. That gives me resources to keep maintaining the product instead of chasing new buyers in two years.
Frequently asked questions
Do the apps really work offline?
Yes. SQLite database local on the phone. Internet only for Pro verification via Google Play and for app updates.
Do the apps diagnose?
No. The apps provide statistical hints for discussion with doctors and allergists. Correlation is not proof of causation — explicitly flagged in scientific mode.
How much data is needed for a useful analysis?
Realistically 2–4 weeks of daily tracking. The app shows a confidence level with every evaluation — marked as "preliminary" or "not_evaluable" when there's too little data.
Delete the app = data gone?
Exactly. No server, no cloud backup, no recovery. Both apps offer an encrypted JSON export for your own backup.
Which permissions?
Biometrics (optional, app lock), notifications (optional, reminders), storage (for backup export). No camera, no location, no microphone.
iOS version?
In progress. Coming as soon as the Apple Developer Account migration is complete.
Why two separate apps instead of one?
Allergy tracking and medication tracking have different data models, different pharmacokinetic assumptions and different audiences. A combo app would be too complex for both groups.
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 Android 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. Google 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.
