A weight tracker that keeps your data private
Log your weight on your terms. Every weigh-in is encrypted on your device before it goes anywhere — not even we can see your numbers. No account or email needed to start.
You track anything. Nothing tracks you.
Free forever. No account required.
Start tracking your weight in seconds
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Step on the scale, log it
Open the app and enter your weight. Choose kg or lbs — whatever you prefer. It takes a few seconds and fits into any morning routine.
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Your data gets encrypted instantly
Every weigh-in is encrypted right on your device. Your weight history never leaves your phone unprotected, and no one at Quanitya can read it.
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Watch your trend, not the noise
Time series charts smooth out daily fluctuations and show your real trend over weeks and months. See genuine progress without the stress of day-to-day swings.
Everything you need from a body weight tracker
Simple enough for a quick daily log. Clear enough to show you what's really happening over time.
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Quick daily weigh-ins
Log your weight in seconds. Supports kg and lbs with proper unit handling so your data is always accurate.
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Trend charts that cut through noise
Body weight fluctuates day to day. Time series charts show your moving trend so you can see real progress without obsessing over single readings.
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Works offline, always
No internet? No problem. Your weight log works completely offline. Data syncs when you're back online — still encrypted.
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Encrypted cloud sync
Use Quanitya on multiple devices. End-to-end encrypted sync means your weight data stays private even when it travels through the cloud.
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No account needed
Start logging immediately. No email, no password, no personal information. Your identity stays as private as your weigh-ins.
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Your data belongs to you
No ads, no data selling, no third-party analytics watching your weight. Your body is your business — your data should be too.
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
- Most weight tracking apps store your weigh-ins on their servers where the company can access them. Quanitya encrypts everything on your device first. Your weight history, trends, and notes are genuinely private — we couldn't read them even if asked to.
- Yes. Quanitya uses proper SI dimension fields, so your data is stored accurately regardless of which unit you display. Switch between kg and lbs anytime without losing precision.
- Body weight is sensitive personal health data. It can affect insurance, hiring, and how people perceive you. Most weight apps don't treat it that way. Quanitya encrypts your weigh-ins on your device so this data stays between you and your scale.
- Yes. You can add custom fields for body measurements, body fat percentage, or anything else you want to monitor. Everything gets the same on-device encryption as your weight entries.
- 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.
How is this different from Happy Scale or Libra?
Can I switch between kg and lbs?
Why does privacy matter for weight tracking?
Can I track other measurements alongside weight?
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?
Your weight, your business
Start your private weight log today. Free to use, encrypted by default, no account required.
Get Started