Comparison

Null Fasting vs Private Contacts Vault App

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Null Fasting

This app helps you track intermittent fasting with flexible protocols, detailed statistics, and motivational tools. It integrates with health platforms and offers personalized goal setting for a healthier lifestyle.

Highlights
  • Flexible fasting protocols (16:8, OMAD, custom)
  • Intelligent tracking with timers and notifications
  • Comprehensive statistics and progress analysis
  • Apple Health integration
  • Milestone tracking and educational content
  • Personalized motivation and goal setting
  • Smart scheduling and reminders
Features
Read full description

Transform your health journey with Null, the intelligent fasting companion that makes intermittent fasting simple, insightful, and rewarding. Null is a comprehensive intermittent fasting tracker designed to support your fasting goals with powerful tracking features, detailed statistics, and motivational tools. Whether you're new to fasting or a seasoned practitioner, Null provides everything you need to establish and maintain a successful fasting routine. Key Features: FLEXIBLE FASTING PROTOCOLS Track popular fasting methods including 16:8, 18:6, 20:4, OMAD, and more Create custom fasting durations tailored to your specific needs Choose between countdown or count-up timers based on your preference Schedule recurring fasts to automate your fasting routine INTELLIGENT TRACKING Monitor your active fast with precise timers and progress indicators Receive notifications for fasting milestones and achievements Pause and resume functionality for real-world flexibility Smart time zone handling ensures accurate tracking while traveling COMPREHENSIVE STATISTICS View detailed insights about your fasting history and patterns Track completion rates, average durations, and consistency scores Analyze weekly, monthly, quarterly, or yearly fasting data Compare performance between time periods to measure progress HEALTH INTEGRATION Sync your fasting data with Apple Health (optional) Track weight changes and correlate them with your fasting habits Monitor water intake during fasting periods Connect fasting metrics with other health data for a holistic view MILESTONE TRACKING Learn about physical benefits as you reach fasting milestones Track autophagy, ketosis, and other fasting-related biological processes See your progress visualized through informative timeline indicators Understand the science behind intermittent fasting as you progress PERSONALIZED MOTIVATION Earn awards and achievements as you build consistency Track and celebrate fasting streaks with visual celebrations Set and achieve custom goals tailored to your health journey Choose your preferred motivational style from friendly to humorously snarky SMART SCHEDULING Create recurring fasting schedules that fit your lifestyle Receive reminders when it's time to start your next fast Add exception dates for special occasions without breaking your routine Get notified when your scheduled fasts are coming up BEAUTIFUL INTERFACE Clean, intuitive design that makes tracking your fasts effortless Multiple theme options to personalize your experience Dark mode support for comfortable nighttime use Straightforward data visualization that clearly shows your progress GOAL-BASED APPROACH Set personalized fasting goals based on total fasts, hours, or consistency Track progress toward your goals with visual indicators Celebrate when you reach important milestones Create new challenges as you master your fasting practice Null goes beyond basic fasting timers by providing educational content about the physiological changes happening during your fast. Learn about fat burning, ketosis, autophagy, and cellular regeneration as you reach key milestones in your fasting journey. Your privacy matters to us. All data is stored locally on your device, with optional, secure Apple Health integration. No account creation required. Whether you're fasting for weight management, metabolic health, longevity, or spiritual practice, Null provides the tools you need to succeed. Start your fasting journey today with the support of an app that understands the science and challenges of intermittent fasting. Download Null now and transform your relationship with food, time, and health! Note: This app is designed as a tool to support intermittent fasting practices. Please consult with your healthcare provider before starting any fasting regimen, especially if you have existing health conditions or concerns.

About

Private Contacts Vault App

Features
Read full description

Private Contacts is a professional contact management app built with privacy and security in mind. We believe that your contact information belongs only to you, not to any third-party server. That's why Private Contacts uses local storage. Your contact data always remains on your device, is not automatically uploaded to the cloud, is not synchronized with external servers, and is not used for advertising or marketing purposes. Why Choose Private Contacts? 【Privacy First】 • Hide important contacts • Manage sensitive information privately • Keep your contacts in a dedicated private space • Help reduce the risk of personal information exposure 【Secure Local Storage】 • Contact data stays on your device • No automatic uploads to external servers • No collection of your contact content • No sharing of your personal information 【Professional and Reliable】 • Clean and modern interface • Focused on secure contact management • Quickly view and manage contacts • Support for phone calls, messages, and emails 【Easy Contact Management】 • Save private contacts • Manage important phone numbers • Organize personal and work contacts • Add notes, email addresses, companies, job titles, and more Your privacy deserves better protection. Private Contacts is dedicated to creating a safe, professional, and reliable private contact space, allowing you to store and manage your important contacts with confidence. Our Principles: • Your data belongs to you • Local storage comes first • Privacy protection is our priority • Security is built into the design Choose Private Contacts and give your important contacts a safer, more private, and more reliable level of protection. https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Null Fasting4 screens
Private Contacts Vault App2 screens

Verdict

The call

The clearest difference is in-app purchases: Null Fasting at none against Private Contacts Vault App's 1. Null Fasting also leads on update cadence (weekly vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Private Contacts Vault App sells 1 one-off in-app purchase. Null Fasting asks for nothing beyond the download.

UpkeepUpdate frequency

Null Fasting ships an update weekly, Private Contacts Vault App every 3 months. Both last shipped on October 24, 2026.

Scorecard2 real differences · 8 level
Null Fasting versus Private Contacts Vault App: the parameters behind the verdict, then further details
ParameterNull FastingPrivate Contacts Vault App
PriceFreeFree
Rating4.5 (2 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings2 — better—
Update frequencyWeekly — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhoneiPhone
Requires iOS17.616.0 — better
Further details — not scored
Size21 MB8 MB
Age rating4+4+
DeveloperYMMV敏 韩

In-app purchases

None

Null Fasting

No in-app purchases

1 purchases

Private Contacts Vault App

One-time1
  • 终身会员(Lifetime Premium)$14.99

Questions

Is Null Fasting free?
Null Fasting is free to download, with no in-app purchases.
Is Private Contacts Vault App free?
Private Contacts Vault App is free to download, with in-app purchases available.
Do Null Fasting or Private Contacts Vault App have ads?
Neither Null Fasting nor Private Contacts Vault App shows ads.
Which is updated more often, Null Fasting or Private Contacts Vault App?
Null Fasting ships an update weekly, and Private Contacts Vault App every 3 months. Most recently, Null Fasting was updated on October 24, 2026 and Private Contacts Vault App on October 24, 2026.

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