# Empty vs Coreology Check

The clearest difference is in-app purchases: Coreology Check at none against Empty's 1. Coreology Check also leads on ads (none vs shown) and iOS requirement (13.4 vs 15.6). Empty's advantage is device support (3 vs 1). On price and update cadence there is nothing between them.

Both are free to download. Empty sells 1 one-off in-app purchase. Coreology Check asks for nothing beyond the download.

Empty ships an update every 6 months, Coreology Check every 4 months. The most recent releases landed on October 12, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | Empty | Coreology Check |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (95 ratings)](https://appshunter.io/ios/app/empty-fasting-tracker/id1349345869/reviews)** | — |
| Number of ratings | **95** | — |
| Positive reviews | 70.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 6 months | **Every 4 months** |
| Monetization | Free with in-app purchases | — |
| Size | 14 MB | 36 MB |
| Requires iOS | 15.6 | **13.4** |
| Devices | **iPhone, iPad, iPod** | iPad |
| Age rating | 4+ | 4+ |
| Developer | [Thang Nguyen](https://appshunter.io/developer/921360262) | [MGR Online Inc](https://appshunter.io/developer/1536123588) |

## What reviewers say

### Empty

[App page](https://appshunter.io/ios/app/empty-fasting-tracker/id1349345869)

This app helps you track various fasting methods, including intermittent, circadian rhythm, and custom plans. It provides smart reminders and detailed progress views to support your health goals.

**Highlights:** Intermittent Fasting Tracking, Circadian Rhythm Fasting, Custom Fasting Plans, Smart Reminders, Progress Visualization, Fasting History

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Upgrade | $4.99 | one-time |


### Coreology Check

[App page](https://appshunter.io/ios/app/coreology-check-in/id1540951293)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Empty free?

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

### Is Coreology Check free?

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

### Do Empty or Coreology Check have ads?

Empty shows ads; Coreology Check does not.

### Which is updated more often, Empty or Coreology Check?

Empty ships an update every 6 months, and Coreology Check every 4 months. Most recently, Empty was updated on October 12, 2026 and Coreology Check on October 7, 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.*