A sleep diary that stays between you and your pillow
Log your sleep, spot patterns, and build better habits — with everything encrypted on your device. No account, no data sharing, no compromise.
You track anything. Nothing tracks you.
Free forever. No account required.
Three taps to a better night
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Log your sleep
Record when you went to bed, when you woke up, and how you felt. Add notes about anything that might have affected your rest.
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See your patterns
Watch your sleep trends emerge over days and weeks. Notice what helps you sleep well and what throws you off.
- 03
Improve with clarity
Use your own data to make small, informed changes. No algorithms telling you what to do — just honest insights from your own records.
Everything you need, nothing you don't
A simple sleep log designed around your privacy and your pace.
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Manual sleep logging
Record bedtime, wake time, and sleep quality on your own terms. No sensors, no microphone access, no background tracking.
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Encrypted on your device
Your sleep data is encrypted locally before it goes anywhere. Not even we can read it.
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No account required
Start tracking immediately with anonymous authentication. No email, no password, no personal information collected.
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Notes and context
Add freeform notes to any entry — caffeine, stress, exercise, late screens. Build a complete picture of what shapes your sleep.
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Works offline
Log your sleep without an internet connection. Your data syncs quietly when you're back online, if you choose to.
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Optional encrypted sync
Keep your sleep diary across multiple devices with end-to-end encrypted cloud sync. Your data stays unreadable to everyone but you.
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. Quanitya is a manual sleep diary — you log your bedtime, wake time, and how you felt. This keeps things simple and means the app never needs access to your microphone, motion sensors, or health data.
- Most sleep apps run in the background, access sensors, and store your data on their servers. Quanitya takes a different approach: you log your sleep yourself, everything is encrypted on your device, and no account or personal information is needed. It's a private sleep diary, not a sleep monitor.
- Yes. A consistent manual sleep diary is exactly what most doctors and sleep specialists ask for. Because you record your own observations, your log reflects how you actually experience your sleep — which is often more useful in a clinical conversation than raw sensor data.
- 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.
Does Quanitya automatically detect my sleep stages?
How is this different from Sleep Cycle or AutoSleep?
Can I use my sleep log to share with my doctor?
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 sleep diary tonight
Free, encrypted, and no account needed. Just open the app and log your first night.
Get Started