# CalCs vs MobAlerm

The clearest difference is in-app purchases: MobAlerm at none against CalCs's 3. MobAlerm also leads on iOS requirement (13.0 vs 15.0). CalCs's advantage is update cadence (every 5 days vs every 10 days). On price, ads and device support there is nothing between them.

CalCs costs $0.49 and MobAlerm $0.49 up front. CalCs sells 3 one-off in-app purchases. MobAlerm asks for nothing beyond the download.

CalCs ships an update every 5 days, MobAlerm every 10 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | CalCs | MobAlerm |
| --- | --- | --- |
| Price | $0.49 | $0.49 |
| 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 | No |
| Update frequency | **Every 5 days** | Every 10 days |
| Monetization | Free with in-app purchases | — |
| Size | 5 MB | 1 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPod, Apple Watch | iPhone, iPod, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Akihiro Usui](https://appshunter.io/developer/1387267485) | [Kengo Tate](https://appshunter.io/developer/1458012620) |

## 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 |


### MobAlerm

[App page](https://appshunter.io/ios/app/mobalerm/id6737408995)

**In-app purchases:** none


## Frequently asked questions

### Is CalCs free?

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

### Is MobAlerm free?

MobAlerm costs $0.49, with no in-app purchases.

### Do CalCs or MobAlerm have ads?

Neither CalCs nor MobAlerm shows ads.

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

CalCs ships an update every 5 days, and MobAlerm every 10 days. Most recently, CalCs was updated on October 25, 2026 and MobAlerm on October 25, 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.*