Comparison

SimpleCal vs School DelayZz

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

Head to head
About

SimpleCal

This calendar app offers a streamlined way to manage your schedule with features like event syncing, customizable interfaces, and helpful reminders. It provides a clear overview of your day and integrates with popular calendar services for easy data backup and access across devices.

Highlights
  • Syncs with iCloud and Google Calendar
  • Customizable interface with color themes
  • Event reminders with repeat options
  • Widget for quick event overview
  • Weather forecast integration
  • Dark mode support
  • Data backup to external servers
Features
Read full description

SimpleCal is the easiest calendar app on the App Store. Sync your schedule across platforms and devices through iCloud or Google calendar. - Sync All the events on your current calendar are transferable from another calendars via iCloud or Google calendar. (The connection uses the calendar account registered in the Settings app) - Widget Your recent events can be displayed on a widget to grasp what to do quickly. - Weather The weather forecast for the specified area is displayed on the calendar(up to one week ahead) - Reminders You won't miss your important events via SimpleCal's reminder. The reminders can be repeated daily, weekly, monthly and yearly. - Customizable interface Each event and calendar can have different colors, which makes you easily recognize your schedule. The color theme is also customizable. You can find your favorite theme for sure. - Simple design You can add or edit an event only with a few steps. Do you have some routine in your life? Then, try SimpleCal! You can create a new event just by dragging a past event. - Dark Mode Supports dark mode. - Data Backup Saves event data to an external server such as iCloud Calendar or Google Calendar. (The app does not have its own calendar and does not save to the device's local area.) In the unlikely event that your iPhone is damaged, you can simply log in to your original calendar account to load your previous event data. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Terms of Service: https://landlake.co.jp/simplecal/en/tos/ Privacy Policy: https://landlake.co.jp/simplecal/en/privacy/

About

School DelayZz

This alarm app automatically adjusts your wake-up time for school delays or closures due to weather. Customize your extra sleep preferences for different delay lengths and enjoy more rest on snow days.

Highlights
  • Automatic wake-up time adjustment
  • Customizable extra sleep preferences
  • Silent notification for delays
  • Supports school delays, closures, and remote learning
  • School selection from a list
Read full description

School DelayZz is an alarm that automatically adjusts your regular wake up time when your school is delayed, closed, or changed to a remote learning schedule due to inclement weather, allowing you to sleep longer on bad weather days! First, select your school from the list of schools. Next, configure the alarm for your regular wake up time and customize your extra sleep preferences in the event of varying length delays, closings, or changes to a remote learning schedule. For example, in the event of a 2-hour delay, choose to sleep the entire length of the delay or just an extra 15 minutes. When a delay, closing, or change to remote schedule occurs, you will receive a silent notification, and the School DelayZz alarm will automatically adjust according to your customizations and will set a new alarm for you! Finally, no more waking up just to sleep more! Snow days just got better! If you don't see your school/school district on our list, ask your school administration to use our system free of charge for school delays and closings, in addition to their regular communication procedures. School administrators can sign up at https://schooldelayzz.com. Privacy Policy: https://schooldelayzz.com/privacy Terms and Conditions: https://schooldelayzz.com/terms-and-conditions

Screenshots

SimpleCal4 screens
School DelayZz3 screens

Verdict

The call

The clearest difference is ads: School DelayZz at none against SimpleCal's shown. School DelayZz also leads on rating (5.0 vs 4.7) and iOS requirement (12.4 vs 15.0). SimpleCal's advantage is ratings volume (18K vs 14) and update cadence (fortnightly vs every 2 months). On price, review sentiment, in-app purchases and monetization model 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

Both are free to download. SimpleCal sells 2 in-app purchases, starting at $0.99 per month and School DelayZz sells 1 in-app purchase, starting at $1.99 per year. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

School DelayZz holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: SimpleCal has 18K ratings behind it against 14, so its average is the more settled of the two. Written reviews complicate that: 85% of SimpleCal's written reviews are positive against 83% of School DelayZz's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

SimpleCal ships an update fortnightly, School DelayZz every 2 months. The most recent releases landed on November 11, 2026 and November 3, 2026 respectively.

Scorecard5 real differences · 5 level
SimpleCal versus School DelayZz: the parameters behind the verdict, then further details
ParameterSimpleCalSchool DelayZz
PriceFreeFree
Rating4.7 (18K ratings)5.0 (14 ratings) — better
Positive reviews84.6% of reviews — better83.3% of reviews
Number of ratings18K — better14
Update frequencyFortnightly — betterEvery 2 months
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.012.4 — better
Further details — not scored
Size23 MB30 MB
Age rating4+4+
DeveloperLandLake LLCKohi LLC

Customer experience

SimpleCal

All ratings17,614 ratings
Positive94.1%
Neutral3.2%
Negative2.7%
Written reviews1,251 reviews
Positive84.6%
Neutral3.4%
Negative12.1%

School DelayZz

All ratings14 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews6 reviews
Positive83.3%
Neutral0.0%
Negative16.7%

Bugs and requests

SimpleCal

Reported bugs

3 issues
  • Calendar stuck on one date
  • Home screen widget not working
  • Issues with setting recurring events

Requested features

8 requests
  • Add more color options
  • Ability to gray out past days
  • Custom reminder times
  • Separate work and personal calendars
  • Printable calendar view
Show 3 more
  • Sync colors across devices
  • Add subtasks for events
  • Ability to delete specific holidays

School DelayZz

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

SimpleCal

Subscriptions1
  • Ads removal$0.991 Month
One-time1
  • Remove Ads$49.99
1 purchases

School DelayZz

Subscriptions1
  • Yearly Subscription$1.991 Year

Questions

Is SimpleCal free?
SimpleCal is free to download, with in-app purchases available.
Is School DelayZz free?
School DelayZz is free to download, with in-app purchases available.
Which has better reviews, SimpleCal or School DelayZz?
School DelayZz is rated higher. SimpleCal averages 4.7 out of 5 from 18K ratings, while School DelayZz averages 5.0 from 14 ratings.
Do SimpleCal or School DelayZz have ads?
SimpleCal shows ads; School DelayZz does not.
Which is updated more often, SimpleCal or School DelayZz?
SimpleCal ships an update fortnightly, and School DelayZz every 2 months. Most recently, SimpleCal was updated on November 11, 2026 and School DelayZz on November 3, 2026.

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