# Custom Alerts vs GROUPS Calendar

The clearest difference is price: GROUPS Calendar at Free against Custom Alerts's $0.99. GROUPS Calendar also leads on update cadence (every 5 days vs every 13 months). Custom Alerts's advantage is in-app purchases (none vs 12) and chart position (#116 vs unranked). On ads and device support there is nothing between them.

GROUPS Calendar is free to download; Custom Alerts costs $0.99 up front. GROUPS Calendar sells 12 one-off in-app purchases. Custom Alerts asks for nothing beyond the download.

Custom Alerts ships an update every 13 months, GROUPS Calendar every 5 days. The most recent releases landed on October 26, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Custom Alerts | GROUPS Calendar |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | **[3.8 (4 ratings)](https://appshunter.io/ios/app/custom-alerts/id682227805/reviews)** | — |
| Number of ratings | **4** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 5 days** |
| Monetization | Paid | — |
| Best chart rank | **#116** | — |
| Size | 1 MB | 82 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Calm Seas Software, LLC](https://appshunter.io/developer/1527599491) | [Luis Alberto Reyes Halaby](https://appshunter.io/developer/1523513037) |

## What reviewers say

### Custom Alerts

[App page](https://appshunter.io/ios/app/custom-alerts/id682227805)

**Currently charting:** #116 Top Paid · Productivity (US App Store)

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.

**Highlights:** Set alerts from 0 minutes to 99 weeks ahead, Supports multiple calendars, Create and edit calendar events, Syncs with iOS calendar, Customizable alert timing

**Features:** macOS Compatibility

**In-app purchases:** none


### GROUPS Calendar

[App page](https://appshunter.io/ios/app/groups-calendar/id1636101268)

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

**In-app purchases (12)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Component: Alarms Silencer | $0.99 | one-time |
| Component: Variable text | $0.99 | one-time |
| Component: Variable Schedule | $0.99 | one-time |
| Component: Audio | $1.99 | one-time |
| Platinum account | $1.99 | one-time |
| Component: Images | $2.99 | one-time |
| Gold Account | $2.99 | one-time |
| Platinum Account | $3.99 | one-time |
| Silver account | $4.99 | one-time |
| Platinum account | $6.99 | one-time |
| Donation | $9.99 | one-time |
| Donation | $19.99 | one-time |


## Frequently asked questions

### Is Custom Alerts free?

Custom Alerts costs $0.99, with no in-app purchases.

### Is GROUPS Calendar free?

GROUPS Calendar is free to download, with in-app purchases available.

### Do Custom Alerts or GROUPS Calendar have ads?

Neither Custom Alerts nor GROUPS Calendar shows ads.

### Which is updated more often, Custom Alerts or GROUPS Calendar?

Custom Alerts ships an update every 13 months, and GROUPS Calendar every 5 days. Most recently, Custom Alerts was updated on October 26, 2026 and GROUPS Calendar on October 8, 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.*