Your symptoms, your eyes only
Track pain, fatigue, flares, and triggers in a health diary that encrypts everything on your device. No account required, no data harvested — just a calm, private space to understand your body.
You track anything. Nothing tracks you.
Free forever. No account required.
Start tracking in under a minute
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Open and log
No sign-up, no email, no password. Open Quanitya and start recording symptoms, severity, and notes immediately.
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Encrypted on your device
Every entry is encrypted before it ever leaves your hands. Your health data stays on your device by default — fully offline-capable.
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Spot patterns over time
Review your history to find connections between symptoms, triggers, and daily habits. Optionally sync across devices with end-to-end encryption.
Built for people who need privacy most
Health data is some of the most sensitive information you have. Quanitya treats it that way.
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On-device encryption
Your symptom logs are encrypted locally before anything else happens. Not even we can read them.
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No account required
Anonymous authentication means you never hand over an email, name, or any identifying detail to start tracking.
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Works offline
Log symptoms during doctor visits, in waiting rooms, or anywhere without a connection. Everything syncs when you're ready.
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Flexible symptom logging
Track any symptom with custom severity scales, timestamps, and free-text notes. Adapt it to your condition, not the other way around.
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End-to-end encrypted sync
Want your diary on multiple devices? Enable cloud sync and your data travels encrypted — unreadable to any server in between.
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Trigger and pattern notes
Add context like meals, weather, stress, or medications alongside symptoms so you can spot what makes things better or worse.
Charts and trends
Multiple chart types
Custom analysis
Built for any kind of tracking
Design your own templates or let AI do it for you.
AI template generation
Custom template designer
Why people switch to Quanitya
Encrypted and on your device
Your data is encrypted and stored locally. The server can't read it — even if someone broke in, they'd get nothing usable.
No account, no email, no password
Sign up anonymously. No personal information collected. We don't know who you are and we like it that way.
Track it your way
Build custom templates with the fields you actually need — or describe what you want and let AI create it for you.
Works offline, syncs when you want
Everything works without internet. Want your data on all your devices? Optional encrypted sync keeps everything in sync — still end-to-end encrypted.
Free forever
All tracking, templates, charts, and local analysis are free with no ads. Cloud sync and advanced AI analysis are optional upgrades.
Source code you can verify
Our code is publicly available. Don't take our word for the encryption — check it yourself.
We can't see your data — even if we wanted to
Your entries are encrypted on your device. If you turn on sync, data is encrypted before it leaves your phone — the server only stores blobs it can't decrypt. We don't collect names, emails, or any personal identifier. We don't even know who you are — just an anonymous public key. If we got hacked tomorrow, attackers would find encrypted noise and anonymous keys. Nothing useful.
Frequently Asked Questions
- No. Your data is encrypted on your device and Quanitya has no way to read, share, or hand it over to anyone. You can choose to show your logs to your doctor yourself, on your own terms.
- Yes. You can log any number of symptoms, group them however you like, and add notes for context. Quanitya doesn't limit you to a predefined list of conditions.
- If you enabled end-to-end encrypted cloud sync, your data can be restored on a new device. Without sync enabled, data lives only on that device — which also means no one who finds your phone can read it without your key.
- Yes. All tracking, templates, charts, and local analysis are completely free — no ads, no paywalls, no hidden costs. Optional paid features include cloud sync and advanced statistical reports. Even the paid analysis is privacy-preserving — your data is stripped of all labels and sent as anonymous numbers. The server does the math and sends results back, with nothing stored.
- No. Quanitya uses anonymous authentication. You get a recovery key when you start — no email, no password, no personal info required.
- Yes. Your data is encrypted on your device and never sent anywhere unencrypted. We use anonymous authentication — no email, no name, no phone number. The server stores only encrypted data it cannot read.
- Yes. Quanitya works fully offline. All your data is stored locally. Cloud sync is optional and encrypted end-to-end if you choose to use it.
- Yes. Encrypted cloud sync is available as an optional subscription. Your data is encrypted end-to-end before it leaves your device — the server never sees it in plaintext.
- Yes. You can export all your data as JSON at any time. Your data belongs to you.
Can my doctor or insurance company access my symptom data?
Can I track symptoms for multiple conditions at once?
What happens to my data if I lose my phone?
Is Quanitya really free?
Do I need to create an account?
Is my data really private?
Does it work offline?
Can I sync across devices?
Can I export my data?
Start your private symptom diary today
Free, encrypted, and no account needed. Your health story belongs to you.
Get Started