# Fast Days vs Decrease

The clearest difference is in-app purchases: Fast Days at none against Decrease's 5. Decrease's advantage is iOS requirement (13.0 vs 17.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Decrease sells 5 in-app purchases, starting at $11.99 per month. Fast Days asks for nothing beyond the download.

Fast Days ships an update every 2 weeks, Decrease every 3 weeks. The most recent releases landed on September 20, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | Fast Days | Decrease |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (3 ratings)](https://appshunter.io/ios/app/fast-days-catholic-fasting/id6760799025/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Monetization | Free | — |
| Size | 4 MB | 68 MB |
| Requires iOS | 17.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [BOLZ SOBRADO](https://appshunter.io/developer/1886295099) | [Weyrich Enterprises, Inc.](https://appshunter.io/developer/445293140) |

## What reviewers say

### Fast Days

[App page](https://appshunter.io/ios/app/fast-days-catholic-fasting/id6760799025)

This app helps Christians rediscover the tradition of fasting by calculating fasting and abstinence days based on the Church calendar. It offers three tiers of practice, daily guidance with meal suggestions and reflections, and information on exemptions for various conditions. Widgets provide at-a-glance scheduling.

**Highlights:** Calculates fasting and abstinence days, Three tiers of fasting practice, Daily meal guidance and reflections, Exemptions for medical conditions, Home screen widgets, In-depth articles on fasting history

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

**In-app purchases:** none


### Decrease

[App page](https://appshunter.io/ios/app/decrease-catholic-fasting-app/id6762350262)

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

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Decrease Premium Monthly | $11.99 | per month |
| Decrease Premium Annual | $69.99 | per year |
| Decrease Family & Friends Annual | $174.99 | per year |
| Decrease Lifetime | $149.99 | one-time |
| Decrease Family Lifetime | $199.99 | one-time |


## Frequently asked questions

### Is Fast Days free?

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

### Is Decrease free?

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

### Do Fast Days or Decrease have ads?

Neither Fast Days nor Decrease shows ads.

### Which is updated more often, Fast Days or Decrease?

Fast Days ships an update every 2 weeks, and Decrease every 3 weeks. Most recently, Fast Days was updated on September 20, 2026 and Decrease on September 18, 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.*