# CalCs vs DeferDeck

The clearest difference is price: DeferDeck at Free against CalCs's $0.49. DeferDeck also leads on in-app purchases (none vs 3) and update cadence (every 2 days vs every 5 days). CalCs's advantage is ads (none vs shown) and iOS requirement (15.0 vs 18.0). On device support there is nothing between them.

DeferDeck is free to download; CalCs costs $0.49 up front. CalCs sells 3 one-off in-app purchases. DeferDeck asks for nothing beyond the download.

CalCs ships an update every 5 days, DeferDeck every 2 days. The most recent releases landed on October 24, 2026 and October 13, 2026 respectively.

## The numbers

| Metric | CalCs | DeferDeck |
| --- | --- | --- |
| Price | $0.49 | **Free** |
| Rating | **[4.6 (11 ratings)](https://appshunter.io/ios/app/calcs-calendar-complications/id6499201223/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 66.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | Every 5 days | **Every 2 days** |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 12 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPod, Apple Watch** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Akihiro Usui](https://appshunter.io/developer/1387267485) | [Yasuko Shikiuchi](https://appshunter.io/developer/316029096) |

## What reviewers say

### CalCs

[App page](https://appshunter.io/ios/app/calcs-calendar-complications/id6499201223)

Enhance your Apple Watch experience with customizable calendar complications. Display dates, events, reminders, and monthly calendars directly on your watch face. Manage your schedule at a glance without needing to open the main app.

**Highlights:** Date display complications, Event and reminder display, Monthly calendar view, Customizable week start day, Holiday support, Minimal settings

**Features:** Apple Watch app

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Snack-Sized Tip | $0.49 | one-time |
| Coffee-Sized Tip | $1.99 | one-time |
| Lunch-Sized Tip | $3.99 | one-time |


### DeferDeck

[App page](https://appshunter.io/ios/app/deferdeck/id6779689670)

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

**In-app purchases:** none


## Frequently asked questions

### Is CalCs free?

CalCs costs $0.49, and also offers in-app purchases.

### Is DeferDeck free?

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

### Do CalCs or DeferDeck have ads?

DeferDeck shows ads; CalCs does not.

### Which is updated more often, CalCs or DeferDeck?

CalCs ships an update every 5 days, and DeferDeck every 2 days. Most recently, CalCs was updated on October 24, 2026 and DeferDeck on October 13, 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.*