# ChronoFast AI vs Voltrapp

The clearest difference is in-app purchases: Voltrapp at none against ChronoFast AI's 2. Voltrapp also leads on ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. ChronoFast AI sells 2 in-app purchases, starting at $2.99 per month. Voltrapp asks for nothing beyond the download.

ChronoFast AI ships an update every 9 days, Voltrapp every 5 days. The most recent releases landed on October 9, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | ChronoFast AI | Voltrapp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/chronofast-ai/id6759078045/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 9 days | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 110 MB | 49 MB |
| Requires iOS | 16.0 | **15.1** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 17+ | 4+ |
| Developer | [Soundarya Srinivas](https://appshunter.io/developer/1896661055) | [Anwar Meqor](https://appshunter.io/developer/1892000340) |

## What reviewers say

### ChronoFast AI

[App page](https://appshunter.io/ios/app/chronofast-ai/id6759078045)

This app acts as an AI coach for intermittent fasting, helping users understand if their food intake breaks their fast. It provides detailed metabolic stage information, tracks progress, and offers social features for fasting with friends.

**Highlights:** AI-powered 'Did I Break My Fast?' analysis, Live Activity and Dynamic Island integration, Detailed metabolic stage tracking with scientific sources, Apple Health integration for activity and sleep data, AI meal scanning and barcode scanning, Social fasting features with friends and leaderboards

**Features:** Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ChronoFast-AI-Monthly-Yearly | $2.99 | per month |
| ChronoFast-AI-Monthly-Yearly | $34.99 | per year |


### Voltrapp

[App page](https://appshunter.io/ios/app/voltrapp/id6761904384)

**In-app purchases:** none


## Frequently asked questions

### Is ChronoFast AI free?

ChronoFast AI is free to download, with in-app purchases available.

### Is Voltrapp free?

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

### Do ChronoFast AI or Voltrapp have ads?

ChronoFast AI shows ads; Voltrapp does not.

### Which is updated more often, ChronoFast AI or Voltrapp?

ChronoFast AI ships an update every 9 days, and Voltrapp every 5 days. Most recently, ChronoFast AI was updated on October 9, 2026 and Voltrapp on October 2, 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.*