# Fasting interval 16 vs Abstia

The clearest difference is update cadence: Fasting interval 16 at weekly against Abstia's every 6 weeks. Fasting interval 16 also leads on iOS requirement (11.0 vs 16.4). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Fasting interval 16 ships an update weekly, Abstia every 6 weeks. The most recent releases landed on November 3, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Fasting interval 16 | Abstia |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (2 ratings)](https://appshunter.io/ios/app/abstia/id6797053836/reviews)** |
| Number of ratings | — | **2** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Weekly** | Every 6 weeks |
| Monetization | Free | Free |
| Size | 25 MB | 67 MB |
| Requires iOS | **11.0** | 16.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 12+ | 17+ |
| Developer | [Dirk Storjohann](https://appshunter.io/developer/1456635825) | [Abstia, LLC](https://appshunter.io/developer/6797053838) |

## What reviewers say

### Fasting interval 16

[App page](https://appshunter.io/ios/app/fasting-interval-168/id1494623370)

This app helps you track your intermittent fasting schedule. Simply input your fasting start time, and it will monitor your progress and notify you when your fasting interval concludes. It's designed to support your intermittent fasting journey.

**Highlights:** Intermittent fasting tracking, Fasting start time input, Fasting interval end notification, Supports 16:8 fasting schedule, Proven effectiveness support

**Features:** macOS Compatibility

**In-app purchases:** none


### Abstia

[App page](https://appshunter.io/ios/app/abstia/id6797053836)

This app provides a privacy-focused intermittent fasting tracker with real-time metabolic stage tracking and an AI coach. It helps users understand their body's physiological changes during fasting and offers personalized advice based on their history.

**Highlights:** Real-time metabolic stage tracking, Fasting timer and custom schedules, Personalized AI fasting coach, Biofeedback and health logging, Calendar heatmap and streaks, Widgets and Apple Watch support, Offline-first and private

**Features:** Apple Watch app

**In-app purchases:** none


## Frequently asked questions

### Is Fasting interval 16 free?

Fasting interval 16 is free to download, with no in-app purchases.

### Is Abstia free?

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

### Do Fasting interval 16 or Abstia have ads?

Neither Fasting interval 16 nor Abstia shows ads.

### Which is updated more often, Fasting interval 16 or Abstia?

Fasting interval 16 ships an update weekly, and Abstia every 6 weeks. Most recently, Fasting interval 16 was updated on November 3, 2026 and Abstia on October 31, 2026.

---

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