# 72Hour Fasting Timer vs Autophagy Tracker

The clearest difference is price: Autophagy Tracker at Free against 72Hour Fasting Timer's $1.99. Autophagy Tracker also leads on update cadence (every 3 days vs every 7 months). 72Hour Fasting Timer's advantage is iOS requirement (14.0 vs 17.0). On ads, in-app purchases and device support there is nothing between them.

Autophagy Tracker is free to download; 72Hour Fasting Timer costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

72Hour Fasting Timer ships an update every 7 months, Autophagy Tracker every 3 days. The most recent releases landed on October 8, 2026 and September 30, 2026 respectively.

## The numbers

| Metric | 72Hour Fasting Timer | Autophagy Tracker |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/72hour-fasting-timer/id6745131744/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 66.7% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 3 days** |
| Monetization | Paid | — |
| Size | 5 MB | 2 MB |
| Requires iOS | **14.0** | 17.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 17+ | 4+ |
| Developer | [POWER SATELLITE LLC](https://appshunter.io/developer/1809833198) | [tva Pte. Ltd.](https://appshunter.io/developer/1838664273) |

## What reviewers say

### 72Hour Fasting Timer

[App page](https://appshunter.io/ios/app/72hour-fasting-timer/id6745131744)

This app assists users in tracking extended fasting periods of 24, 48, or 72 hours. It provides progress zones, statistics, and reminders to help users stay focused and motivated during their fasting journey.

**Highlights:** Smart fasting timer, Progress zones (fat burning, autophagy), Statistics and history, HealthKit sync, Notifications and reminders, Minimalist design

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

**In-app purchases:** none


### Autophagy Tracker

[App page](https://appshunter.io/ios/app/autophagy-tracker/id6759151370)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is 72Hour Fasting Timer free?

72Hour Fasting Timer costs $1.99, with no in-app purchases.

### Is Autophagy Tracker free?

Autophagy Tracker is free to download, with no in-app purchases.

### Do 72Hour Fasting Timer or Autophagy Tracker have ads?

Neither 72Hour Fasting Timer nor Autophagy Tracker shows ads.

### Which is updated more often, 72Hour Fasting Timer or Autophagy Tracker?

72Hour Fasting Timer ships an update every 7 months, and Autophagy Tracker every 3 days. Most recently, 72Hour Fasting Timer was updated on October 8, 2026 and Autophagy Tracker on September 30, 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.*