Privacy-focused medical event tracking using your device's calendar system
About this app
A powerful Android application for tracking medical events, medications, and health metrics using your device's built-in calendar system. No additional accounts or cloud services required.
🚀 Key Features
Quick Event Logging Log common medical events with a single tap using customizable template buttons. Optional dosage entry allows for precise medication tracking without hassle.
Comprehensive Tracking
* Health Metrics: Monitor vital signs, symptoms, and measurements * Medications: Track drug intake with automatic concentration calculations * General Events: Log symptoms and health-related activities
Real-Time Drug Concentration Monitoring Advanced pharmacokinetic calculations provide real-time estimates of active drug concentrations in your body, helping you understand medication timing and interactions. Linear and Half-Life decay currently supported.
Historical Data Visualization Interactive graphs and charts display your health data over time, making it easy to identify patterns, track progress, and share information with healthcare providers. Pan and zoomable.
Calendar Backend Integration
* Uses your device's native calendar system * No additional accounts or subscriptions required * Easy data export and import through standard calendar formats * Seamless synchronization across devices using your existing calendar sync * Edit and correct data with your well-known calendar tools * Privacy-friendly calendar strongly recommended
Smart Template System Create hierarchical templates where related items contribute to common categories. For example, configure beer and wine templates to both contribute to overall alcohol tracking, enabling sophisticated health monitoring scenarios.
Intelligent Reminders Set up automated reminders for events that haven't occurred within specified timeframes:
* Medication adherence alerts * Periodic health checks (blood pressure, weight, etc.) * Routine medical appointments * Custom health routines
🔧 Technical Highlights
* Privacy-First: All data stored locally using Android's calendar provider. It's as private as your personal calendar! * No Cloud Dependencies: Can work completely offline * Standard Data Formats: Easy backup and migration using calendar export/import * Flexible Architecture: Extensible template system for custom tracking needs
🔒 Privacy & Data
Your health data can remain completely private and under your control:
* All information stored in your device's calendar * Only transmits data to your trusted calendar backends (private calendar backend recommended) * Easy backup through standard calendar export * Full control over data sharing and access
🎯 Getting Started
1. Grant Permissions: Allow calendar access for data storage and notifications for reminders 2. Set Up Templates: Configure quick-access buttons for your most common events. Tip: use emojis as template and drug name - results in nicer graphs 3. Start Logging: Use one-tap logging for routine events, or add detailed information when needed 4. Get current status: The main screen will show you when things happened last time and how the current concentrations are 5. Monitor Trends: View your data in the graph section to track patterns over time 6. Configure Reminders: Set up alerts for important recurring health activities
Medical Calendar Log - Taking control of your health data, one event at a time.
Licensed under GPL-3.0-or-later, by ntdote.
What's New in v2.0.6
Imported from the F-Droid repository index.
- Bug fixes and stability improvements
Version history
Apr 8, 2026 · 2.2 MB · Android API 23–36 · code 49
Imported from the F-Droid repository index.
- Bug fixes and stability improvements
SHA-256 b1be5d7526c21ed0268a7cd8d920060cf3569727e02c5ff4ddfe96cd84f9ac22
Jan 23, 2026 · 2.2 MB · Android API 23–36 · code 43
Imported from the F-Droid repository index.
- Supports translations now, haptic feedback, a new mand more flexible widget system
SHA-256 92a2b54630731c19536a1f18e00dfe87740e7c152ff9550cb2c290a62b09a106
Jan 12, 2026 · 2 MB · Android API 23–36 · code 41
Imported from the F-Droid repository index.
- Fix for widgets crated before 2.0.0
SHA-256 c5674b83634971b4441e4cc52c6ca8873ab65c38b41eca4e85a1fb5a7e60fcd1
Will it run on your device?
92%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be de.ntdote.medicalcalendarlog is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 2.0.2 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Medical Calendar Log first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Medical Calendar Log, and a listing is removed when the evidence for it stops holding up.
Get Medical Calendar Log
Every source we list for de.ntdote.medicalcalendarlog is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
b1be5d7526c21ed0268a7cd8d920060cf3569727e02c5ff4ddfe96cd84f9ac22
Signing certificate
d276f6f5db6cdcb9c1ec4dda08281804f558fa116e9f41e0031dc4477b9c31b6
Permissions Required
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
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