Comparison

CalCs vs MobAlerm

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CalCs

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
Read full description

CalCs (short for "Calendar Complications") is a watchOS-only app that provides various complications related to the calendar. --Important Notes-- The features built into the main body of this app are limited to listing events/reminders & displaying a monthly calendar. All other features are provided through complications & the Smart Stack. ●If you download CalCs from the iPhone App Store, due to synchronization issues between the iPhone & Apple Watch, CalCs may not appear on the Apple Watch. According to Apple's specifications, watchOS-only apps cannot be re-downloaded from the App Store app on the iPhone. Therefore, please use the App Store app "on your Apple Watch" & follow the steps below to re-download it. ・Scroll to the bottom→"Account"→"Purchased"→"CalCs"→re-download ------------------- Key Features ●Supports a variety of complications such as date display, events/reminders display, & monthly calendar display ・Date Display Displays the current date in various formats. ・Event/Reminder Display Displays events/reminders synced with your iPhone. You can choose whether or not to include all-day events. ・Monthly Calendar Display Displays the monthly calendar in various formats. You can choose to start the week on Monday. Supports holidays in some areas. *Holiday data depends on external APIs & may be incomplete. Only Modular Duo supporting models (Series 7+, not SE series) can show a month calendar using 2 large rectangles. Other models can show it in 1, with smaller font. ●In the main app, events/reminders, & the monthly calendar are displayed Tapping the complication opens the app, where you can view the list of events/reminders synced with your iPhone, as well as the monthly calendar. *Only incomplete reminders are displayed. *The app currently does not have functionality to add, edit, or delete events/reminders, nor to mark reminders as complete. ●Minimal Setting Options To avoid complicating settings on the small Apple Watch screen, the settings only allow you to select which calendar/reminder lists to display. *Notes ・The corner complications, circular complications, & large rectangular complications are supported only on Apple Watch Series 4 & later, so CalCs is not guaranteed to work on Series 3 or earlier models. ・Due to the limitations of watchOS complication display updates, complications may not immediately reflect changes when the date changes or after events or reminders are added or edited on the iPhone. ・After placing a complication for the 1st time, it may take some time for it to actually appear. ・If the complication is not updating, try tapping the complication to open CalCs, as this may refresh the data. ・If the complication is not updated even after launching CalCs, the issue may be resolved by 1 of the following methods. Please try them. 1.Restart both your iPhone & Apple Watch. 2.Force restart CalCs ①With CalCs open, press & hold the side button. ②When the screen for emergency call & power off appears, press & hold the Digital Crown. 3.Reinstall CalCs ①Press the Digital Crown to display the app list. ②Press & hold CalCs, then tap the × button to delete it when it appears. ③Launch the App Store app on your Apple Watch. ④Scroll to the bottom→"Account"→"Purchased"→"CalCs"→Re-download. ・If the complication does not update after force quitting & restarting CalCs, try restarting both your iPhone & Apple Watch, as it may resolve the issue. ・If event information is not displayed on the app's main event/reminder list screen or in complications, it may be because full access to the calendar has not been granted. The issue may be resolved by following the steps below to re-enable full access permission to the calendar. Please give it a try. ①Open the "Privacy & Security" section in the iPhone Settings app & tap "Calendars". ②Change CalCs' calendar access to "None", then select "Add Events Only". ③When you open CalCs, you will be prompted to grant full access, so tap "Allow Full Access".

About

MobAlerm

Read full description

SIngle Timer. Three notificate until timer ended.

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

CalCs ships an update every 5 days, MobAlerm every 10 days. The most recent releases landed on October 25, 2026 and October 11, 2026 respectively.

Scorecard3 real differences · 7 level
CalCs versus MobAlerm: the parameters behind the verdict, then further details
ParameterCalCsMobAlerm
Price$0.49$0.49
Rating4.6 (11 ratings) — better—
Positive reviews66.2% of reviews—
Number of ratings11 — better—
Update frequencyEvery 5 days — betterEvery 10 days
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPod, Apple WatchiPhone, iPod, Apple Watch
Requires iOS15.013.0 — better
Further details — not scored
Size5 MB1 MB
Age rating4+4+
DeveloperAkihiro UsuiKengo Tate

In-app purchases

3 purchases

CalCs

One-time3
  • Snack-Sized Tip$0.49
  • Coffee-Sized Tip$1.99
  • Lunch-Sized Tip$3.99
None

MobAlerm

No in-app purchases

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 11, 2026.

Other comparisons