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LogZero: Private Life Tracker Review

LogZero is a private, all-in-one iOS tracker for moods, meds, food, exercise, meditation, weight, and todos, operating 100% on-device to ensure user data privacy.

shipped Aug 23, 2026researchfreemium
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LogZero: Private Life Tracker — product screenshot

Why it matters

1Operates 100% on-device, ensuring data is encrypted with AES-256 symmetric key encryption.
2Offers a freemium model with Pro Monthly ($5), Pro Annual ($35), and Pro Lifetime ($99) tiers.
3Supports tracking for mood, medication, food, exercise, meditation, weight, and todos on iOS 16+ devices.
4Version 1.1.0 released on July 26, 2026, included UI bugfixes for iOS mobile devices.

About LogZero: Private Life Tracker

Business Model
Freemium SaaS
Platforms
iOS
Target Audience
iPhone users looking for a private tracking app

Pricing Plans

Free
Free
  • Limited customization
  • Limited advanced functionality
Pro
$5/mo
  • Full app access
  • All customization features
Pro Annual
$35/yr
  • Full app access
  • All customization features
Lifetime
$99 / one-time
  • One-time purchase
  • No renewals

Leadership

Andrew Hoffman

Screenshots

overview

What is LogZero: Private Life Tracker?

LogZero: Private Life Tracker is a personal tracking tool developed by Andrew Hoffman that enables privacy-conscious individuals to monitor various aspects of their life. It operates as an all-in-one iOS application for tracking moods, medications, food intake, exercise, meditation, weight, and todos, ensuring all user data remains securely on the device.

features

Key Features of LogZero: Private Life Tracker

LogZero: Private Life Tracker offers a comprehensive suite of features designed for on-device personal data management, emphasizing user privacy and data security.

  • 100% on-device data storage with AES-256 symmetric key encryption.
  • No accounts required, no ads, no tracking, and no third-party SDKs.
  • Multi-step mood tracking with emotions, activities, gratitude notes, and free-form text.
  • Daily food logging with macro tracking against user-defined targets, including label scanning.
  • Weight logging with goal setting and configurable charts.
  • Rapid exercise logging to correlate impact on mood and weight.
  • Meditation tracking linked to the correlations module.
  • Medication scheduling, adherence tracking, and prescription refill reminders.
  • Prioritized (P0-P4) todo management with custom tags, completion trends, and a 30-day completion rate chart.
  • Local correlation analysis (Pearson's r) between tracked items, such as sleep and mood.

use cases

Who Should Use LogZero: Private Life Tracker?

LogZero: Private Life Tracker is designed for individuals who prioritize data privacy and seek a consolidated platform for personal life management on their iOS devices.

  • Privacy-conscious individuals who require an all-in-one tracker with 100% on-device data storage.
  • Users seeking to track mood and emotions, including daily entries with activities and gratitude notes.
  • Individuals monitoring food intake, macros, and weight with goal setting and historical data.
  • Those managing medication schedules, adherence, and needing prescription refill reminders.
  • Users who want to track exercise and meditation minutes to understand their impact on overall well-being.

how to use

How to Use LogZero: Private Life Tracker

To begin using LogZero: Private Life Tracker, users can download the application from the Apple App Store on an iOS 16+ device. No account creation or personal identifiers are required to start logging data.

  • 1Download LogZero: Private Life Tracker from the Apple App Store on an iPhone or iPad running iOS 16 or later.
  • 2Open the app; no account setup or login is necessary to begin.
  • 3Navigate to specific modules (e.g., Mood, Food, Weight) to input daily data.
  • 4Utilize features like label scanning for food or setting medication reminders.
  • 5Review charts and the Correlation module to gain insights from tracked data.
  • 6Consider upgrading to a Pro tier for advanced features like encrypted exports and biometric support.

pricing

LogZero: Private Life Tracker Pricing & Plans

LogZero: Private Life Tracker operates on a freemium model, offering a free tier with basic functionalities and several paid tiers for access to advanced features without traditional subscriptions.

  • Free Tier: Provides basic tracking, basic charts, and basic settings, serving as a sample with fewer categories and limited history. Contains no ads.
  • Pro Monthly: Priced at $5 per month, offering all tracking features, additional charts, advanced settings, encrypted exports, biometric and passcode support, reminders, and notifications. Cancellable anytime.
  • Pro Annual: Available for $35 per year, providing approximately 42% savings compared to the monthly plan and includes all features of the Pro Monthly tier.
  • Pro Lifetime: A one-time purchase of $99 (originally $149 as an early bird offer), granting permanent access to all Pro features without renewals or recurring payments.

Pros

  • +100% on-device data storage with AES-256 encryption ensures maximum user privacy and security.
  • +No accounts, ads, tracking, or third-party SDKs, eliminating common data privacy concerns.
  • +Comprehensive all-in-one tracking for mood, food, weight, exercise, meditation, medication, and todos.
  • +Offers a free tier with essential functionalities, allowing users to test the app before committing.
  • +Includes a Correlation module for on-device analysis of relationships between tracked data points.
  • +One-time Pro Lifetime purchase option provides permanent access to all features without recurring costs.

Cons

  • Exclusively available on iOS (iPhone & iPad, iOS 16+), limiting access for users on other platforms.
  • Lack of cloud sync or backup options (by design) means data loss could occur if the device is lost or damaged without manual backups.
  • No AI suggestions for its To-Do module, which some users might find less efficient for task management.
  • The emphasis on privacy means no external integrations beyond read-only Apple Health data, limiting broader ecosystem connectivity.

Similar Tools

LogZero: Private Life Tracker vs Competitors

LogZero: Private Life Tracker distinguishes itself in the personal tracking market through its stringent commitment to user privacy and 100% on-device data storage, contrasting with many competitors that rely on cloud-based solutions.

1
Daylio

Daylio focuses heavily on mood tracking through simple, icon-based entries and offers detailed statistics and insights into mood patterns.

While Daylio excels at mood and activity tracking, it doesn't offer the same breadth of specific tracking categories (like medication or detailed food logging) as LogZero. Its privacy model relies on optional cloud backup rather than being strictly on-device by default.

2
Exist.io

Exist.io connects to numerous other apps and services to automatically track and correlate data from various sources, providing insights into how different aspects of your life affect each other.

Exist.io is a web-based service with companion apps, meaning data is stored in the cloud, which differs from LogZero's strict on-device privacy. It's more focused on data correlation from external sources rather than manual, detailed logging within the app itself.

3
Nomie 6

Nomie is a highly customizable self-tracking app that allows users to define and track anything they want, with a strong emphasis on privacy and local data storage.

Nomie offers similar on-device data storage and privacy principles to LogZero, but its interface and setup require more manual configuration due to its highly customizable nature. It might feel less guided than LogZero's pre-defined tracking categories.

4
Streaks

Streaks is a habit tracker designed to help users form good habits and break bad ones, integrating deeply with Apple Health and offering a clean, minimalist interface.

Streaks is excellent for habit formation and tracking specific tasks, but it doesn't offer the comprehensive, all-in-one journaling and detailed logging capabilities for moods, food, or medication that LogZero provides. It's more focused on discrete habits.

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