# Fastyn vs VOID

The clearest difference is in-app purchases: VOID at none against Fastyn's 3. VOID also leads on update cadence (every 2 weeks vs every 3 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Fastyn sells 3 in-app purchases, starting at $1.99 per 7 days. VOID asks for nothing beyond the download.

Fastyn ships an update every 3 months, VOID every 2 weeks. The most recent releases landed on September 27, 2026 and September 3, 2026 respectively.

## The numbers

| Metric | Fastyn | VOID |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/void-intermittent-fasting/id6756490807/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | — | Free |
| Size | 35 MB | 50 MB |
| Requires iOS | 17.6 | **17.0** |
| Devices | iPhone | **iPhone, Apple Watch** |
| Age rating | 17+ | 17+ |
| Developer | [MANUEL MATAS GALEOTE](https://appshunter.io/developer/1794633190) | [河南雀科信息科技有限公司](https://appshunter.io/developer/1439539185) |

## What reviewers say

### Fastyn

[App page](https://appshunter.io/ios/app/fastyn-intermittent-fasting/id6744653719)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Fastyn Plus Weekly | $1.99 | per 7 days |
| Fastyn Plus Monthly | $3.99 | per month |
| Fastyn Plus Annual | $17.99 | per year |


### VOID

[App page](https://appshunter.io/ios/app/void-intermittent-fasting/id6756490807)

This AI-powered coach visualizes your fasting progress, from blood sugar depletion to fat burning. Log meals instantly with photo recognition or voice commands, and receive personalized nutrition and exercise advice. Gamified motivation and smart hydration tracking help build healthy habits.

**Highlights:** AI-powered nutrition coaching, Visualized fasting progress, AI meal logging via photo/voice, Deep Apple Watch integration, Personalized nutrition advice, Gamified motivation and rewards, Smart hydration tracking

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

**In-app purchases:** none


## Frequently asked questions

### Is Fastyn free?

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

### Is VOID free?

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

### Do Fastyn or VOID have ads?

Neither Fastyn nor VOID shows ads.

### Which is updated more often, Fastyn or VOID?

Fastyn ships an update every 3 months, and VOID every 2 weeks. Most recently, Fastyn was updated on September 27, 2026 and VOID on September 3, 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.*