SympLog App
SympLog is a privacy-focused way to track your health and lifestyle — from symptoms and mood to sleep, nutrition, and more — all stored only on your device. See how patterns change and correlate over time, giving you a clear timeline for healthcare visits and your overall progress.
About SympLog
By BitByBit.ch – built on years of experience designing highly sensitive IT systems for Swiss public authorities and the healthcare sector. SympLog grew out of a passion for tools that respect your privacy and help you stay on top of your health.
Fast & Easy Logging
Add entries in seconds, not minutes. Built for daily use with quick, simple data entry whenever you need it.
Complete Privacy
All data stays encrypted on your device. No account needed, no cloud, no tracking. Your health data is truly yours alone.
Encrypted & Secure
Your database is always encrypted. Choose your unlock method: Biometric, PIN, or convenience mode (device lock only). Data stays protected regardless of your choice.
Insights & Correlations
Discover trends and correlations between your logs. See how sleep affects mood, or which activities help your symptoms.
Features
Everything you need to understand your health patterns
Symptom Tracking
Log symptoms with severity, notes, and custom items. Edit defaults or create your own.
Sleep Logging
Track sleep duration and quality to understand your rest patterns.
Mood Journal
Record your daily emotional state and track mood patterns over time.
Nutrition Log
Log meals and nutrition with customizable food items and categories.
Activity Tracking
Record physical activities, exercise, and their impact on your well-being.
Thoughts & Notes
Capture thoughts, reflections, and important notes alongside your health data.
Life Events
Log significant events like job changes, losses, or milestones that affect health.
Medication Tracker
Define your medications and toggle them on/off on a calendar view.
Use built-in categories or create your own custom items for selected journal types.
Symptom Tracking
Log symptoms with severity, notes, and custom items. Edit defaults or create your own.
Sleep Logging
Track sleep duration and quality to understand your rest patterns.
Mood Journal
Record your daily emotional state and track mood patterns over time.
Nutrition Log
Log meals and nutrition with customizable food items and categories.
Activity Tracking
Record physical activities, exercise, and their impact on your well-being.
Thoughts & Notes
Capture thoughts, reflections, and important notes alongside your health data.
Life Events
Log significant events like job changes, losses, or milestones that affect health.
Medication Tracker
Define your medications and toggle them on/off on a calendar view.
Frequently Asked Questions
Find answers to common questions about SympLog
Absolutely. All your health data is encrypted and stored locally on your device only. There are no accounts, no cloud storage, and no way for anyone to access your personal health information.
No account is needed. Simply download the app and start tracking immediately. We believe in simplicity and privacy — no sign-ups, no emails, no passwords.
You can track symptoms, mood, sleep, nutrition, activities, thoughts, and life events. You can also manage medications with a calendar toggle. All items are customizable — edit defaults or create your own.
Your entire database is always encrypted. You can choose your unlock method: Biometric (fingerprint/face), PIN code, or convenience mode which uses your device lock. Even in convenience mode, your data remains fully encrypted.
Yes, you can export and import your data. The export is encrypted and protected with a password, so you can use it to transfer your data to a new device. Always store exported files in a safe place and don’t share them with others.
SympLog is available in English, Deutsch, Français, Español, and Português. It uses AI-powered translations, and you can select your preferred language at any time within the app.
Yes, SympLog supports dark mode. It follows your system preference or can be set manually in the app settings.
We only collect minimal technical data when app errors occur: device model, OS version, app version, locale, timezone, and the error details. No personal information like IP addresses is collected. This only helps us fix bugs.
Privacy Policy
Last updated: November 2025
Local Data Storage
All your health data is encrypted and kept locally on your device. There are no accounts and no cloud services involved. Your personal health information remains private and entirely under your control.
No Personal Data Collection
We do not collect any personal information such as IP addresses, location data, or identifiable user information. Your privacy is our top priority.
Crash & Error Logging
To improve app stability, we collect minimal technical data only when errors occur. Here's exactly what we collect and why:
Phone Brand & Model
Helps us identify device-specific issues (e.g., 'Samsung Galaxy S23'). We can fix bugs that only occur on certain devices.
Operating System & Version
Tells us which OS version you're running (e.g., 'Android 14' or 'iOS 17.2'). Some bugs only appear on specific OS versions.
App Version
Shows which version of our app you're using. This helps us know if a bug was already fixed in a newer release.
Locale
Your language/region setting (e.g., 'en-US'). Helps us find issues related to translations or regional formatting.
Timezone
Your device timezone (e.g., 'Europe/Zurich'). Helps debug time-related calculations and scheduling issues.
Error & Stack Trace
The technical error message and code location. This is essential for our developers to understand exactly what went wrong and fix it.
No Data Sharing
We do not sell, trade, or share any data with third parties. The minimal crash data we collect is used solely for improving the app and is not linked to any personal information.
Your Control
Since all health data is stored locally on your device, you have complete control. You can export or delete your data at any time through the app settings. Uninstalling the app removes all local data.
Contact Us
If you have any questions about our privacy practices, please contact us at privacy@symplog.com
Ready to Start Tracking?
Download SympLog and start understanding your health patterns today.
Easy to Use
Simple Interface
100%
Private & Local
No Account
Required
Unlimited
Tracking