Custom Alerts vs Simple Calendar・Schedule app
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Custom Alerts
This app allows users to set highly customizable alerts for calendar events, ranging from minutes to weeks in advance. It supports multiple calendars and enables event creation and editing directly within the application, syncing seamlessly with the native iOS calendar.
- Set alerts from 0 minutes to 99 weeks ahead
- Supports multiple calendars
- Create and edit calendar events
- Syncs with iOS calendar
- Customizable alert timing
Read full descriptionHide full description
Set alerts on calendar events as close as 0 minutes ahead of the event or as long as 99 weeks ahead of the event •Supports multiple calendars •Create and edit calendar events from within Custom Alerts •Everything automatically syncs with the built-in iOS calendar app.
Simple Calendar・Schedule app
This app offers a streamlined calendar experience, focusing on essential features for easy event management. It's designed for users who prefer simplicity and a clean interface over complex functionalities. Get organized with core calendar tools and helpful notifications.
- Calendar view
- Event creation
- Search functionality
- Notifications
- Holiday tracking
- Customizable styles
- Data backup
Read full descriptionHide full description
About the App ・ A simple and refined calendar app. ・ Focuses on "subtracting rather than adding" and has only the essential features needed for a calendar. ・ An app that pursues "Simple is best". Recommended for ・ People who want to use a calendar app easily and simply ・ People who want to use a regular calendar app ・ People who are tired of using calendar apps with complex features Features ・ Calendar ・ Events ・ Search ・ Notifications ・ Holidays ・ Styles ・ Backup
Screenshots
Verdict
The clearest difference is price: Simple Calendar・Schedule app at Free against Custom Alerts's $0.99. Simple Calendar・Schedule app also leads on rating (4.6 vs 3.8) and update cadence (weekly vs every 13 months). Custom Alerts's advantage is ads (none vs shown) and iOS requirement (12.0 vs 15.0). On in-app purchases 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
Simple Calendar・Schedule app is free to download; Custom Alerts costs $0.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Simple Calendar・Schedule app holds the better App Store score, 4.6 against 3.8. That said, the two scores are not equally well evidenced: Simple Calendar・Schedule app has 2.5K ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 50% of Custom Alerts's written reviews are positive against 79% of Simple Calendar・Schedule app's.
Custom Alerts ships an update every 13 months, Simple Calendar・Schedule app weekly. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.
| Parameter | Custom Alerts | Simple Calendar・Schedule app |
|---|---|---|
| Price | $0.99 | Free — better |
| Rating | 3.8 (4 ratings) | 4.6 (2.5K ratings) — better |
| Positive reviews | 50.0% of reviews | 79.1% of reviews — better |
| Number of ratings | 4 | 2.5K — better |
| Update frequency | Every 13 months | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | Ad-supported — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 1 MB | 61 MB |
| Age rating | 4+ | 4+ |
| Developer | Calm Seas Software, LLC | Futoshi Niiho |
Customer experience
Custom Alerts
Simple Calendar・Schedule app
Bugs and requests
Custom Alerts
Not enough reviews yet to summarise bugs or requests.
Simple Calendar・Schedule app
Reported bugs
3 issues- Backup/restore functionality not working
- Events disappearing from calendar view
- Dates/times not displaying correctly
Requested features
5 requests- Repeat/recurring event functionality
- Widget support for home screen
- Ability to share calendars with others
- Option to set custom notification times
- More color palette choices
In-app purchases
Custom Alerts
No in-app purchases
Simple Calendar・Schedule app
No in-app purchases
Questions
Is Custom Alerts free?
Is Simple Calendar・Schedule app free?
Which has better reviews, Custom Alerts or Simple Calendar・Schedule app?
Do Custom Alerts or Simple Calendar・Schedule app have ads?
Which is updated more often, Custom Alerts or Simple Calendar・Schedule app?
Other comparisons
