LogZero: Private Life Tracker

Track Everything. Share Nothing.

LogZero is the all-in-one private life tracker for mood, habits, food, weight, exercise, meditation, medication, todos and more. Everything stays on your iPhone. No ads. No cloud. No accounts. No analytics. LogZero has security and privacy integrated into it's DNA. LogZero is built by Andrew Hoffman, LLC — owned by Andrew Hoffman: a cybersecurity architect, author and educator.

ONE OFFLINE APP FOR YOUR ENTIRE DAY

Mood module — multi-step daily entries with emotions, activities, gratitude notes, and free-form text. The depth of a private diary, the speed of a tap.
Food module — daily recording of macros against your own targets. Can be configured to track additional vitamins, nutrients and supplements. Scan labels or log manually.
Weight module — log weight over time, set goals, configure charts for easier data review.
Exercise module — log workout minutes rapidly and build data to see how your workouts impact your mood and weight.
Todo module — prioritized, filterable cross-day tasks with tags, completion trends, and a planning view.
Meditation module — daily meditation tracking tied to correlations module to show it's impact on your mood.
Medication module — schedule medication and supplement protocols, adherence tracking, prescription refill reminders and more.
Correlation module — analyze data from all the other modules to draw insights into what is impacting your weight, mood and behavior.
Correlation module — the most important insights from the other modules, charted, configurable and readable at at glance.

100% PRIVATE. 100% ON-DEVICE.

LogZero has no servers. None. Every entry — every mood, meal, weight, symptom, medication dose, and meditation minute lives on your device and nowhere else. We can't see your data by design, and this sets our app apart from almost every competitor.

No Data Collected — verified by Apple's privacy label
No account required
No ads. No telemetry. No third-party SDKs.
Works fully offline — designed for airplane mode, weak signal, and people who explore beyond the bounds of cellular internet
Full data export to CSV or JSON, anytime with optional encryption using AES-256

If you've moved away from other apps because of privacy or security concerns, LogZero is the app you are looking for. Privacy and security are baked into LogZero's DNA.

SEE THE PATTERNS, NOT JUST THE ENTRIES

LogZero's correlation engine surfaces relationships between your trackers: how exercise shifts your mood, what foods line up with weight changes, which activities precede your best days. The kind of analysis a cloud app uses your data to build, but instead done entirely on your phone, for your eyes only.

LOGZERO PRO

Free is genuinely useful — every tracker works end-to-end without paying. Pro unlocks deeper analytics, biometric & passcode support, encrypted backups, and personalization controls.

$4.99/month — low-commitment, cancel anytime
$34.99/year — best value, save ~42%
$99 lifetime — pay once, own it forever (regularly $149)
Cancel anytime in iOS Settings.

WHY LOGZERO EXISTS

Most wellness apps make money by selling your data, serving you ads, creating artificial scarcity, sending you to affiliate links and so on. LogZero's only revenue is your subscription. That's the entire business model — and the reason your data never leaves your phone.

Track everything. Share nothing.

LEGAL INFORMATION

Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://logzero.app/privacy/#policy