# Null Fasting vs Private Contacts Vault App

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.

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

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

## The numbers

| Metric | Null Fasting | Private Contacts Vault App |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/null-fasting/id6743633464/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 months |
| Monetization | Free | — |
| Size | 21 MB | 8 MB |
| Requires iOS | 17.6 | **16.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [YMMV](https://appshunter.io/developer/1224453829) | [敏 韩](https://appshunter.io/developer/1296701367) |

## What reviewers say

### Null Fasting

[App page](https://appshunter.io/ios/app/null-fasting/id6743633464)

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:** macOS Compatibility

**In-app purchases:** none


### Private Contacts Vault App

[App page](https://appshunter.io/ios/app/private-contacts-vault-app/id6760254861)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 终身会员（Lifetime Premium） | $14.99 | one-time |


## Frequently asked 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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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*