# Calendar Reminder vs ObservMemo

The clearest difference is price: Calendar Reminder at Free against ObservMemo's $1.99. ObservMemo's advantage is in-app purchases (none vs 1) and ads (none vs shown). On update cadence and device support there is nothing between them.

Calendar Reminder is free to download; ObservMemo costs $1.99 up front. Calendar Reminder sells 1 one-off in-app purchase. ObservMemo asks for nothing beyond the download.

Calendar Reminder ships an update fortnightly, ObservMemo every 3 weeks. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Calendar Reminder | ObservMemo |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/calendar-reminder/id424441534/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Fortnightly** | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 30 MB | 178 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [文睿 李](https://appshunter.io/developer/372593992) | [Liu ZhiRong](https://appshunter.io/developer/483400125) |

## What reviewers say

### Calendar Reminder

[App page](https://appshunter.io/ios/app/calendar-reminder/id424441534)

Easily manage recurring events and daily tasks with a simple interface. Set reminders for birthdays, anniversaries, and important meetings. Never miss an important date or appointment again.

**Highlights:** Recurrent event management, Daily task planning, Birthday and anniversary reminders, Appointment and meeting alerts, Customizable sound/vibrate notifications

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $0.99 | one-time |


### ObservMemo

[App page](https://appshunter.io/ios/app/observmemo/id6751184366)

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

**In-app purchases:** none


## Frequently asked questions

### Is Calendar Reminder free?

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

### Is ObservMemo free?

ObservMemo costs $1.99, with no in-app purchases.

### Do Calendar Reminder or ObservMemo have ads?

Calendar Reminder shows ads; ObservMemo does not.

### Which is updated more often, Calendar Reminder or ObservMemo?

Calendar Reminder ships an update fortnightly, and ObservMemo every 3 weeks. Most recently, Calendar Reminder was updated on October 28, 2026 and ObservMemo on October 24, 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.*