# Anniversary Reminder vs PetCareOS

The clearest difference is in-app purchases: PetCareOS at none against Anniversary Reminder's 1. PetCareOS also leads on ads (none vs shown). Anniversary Reminder's advantage is update cadence (every 5 weeks vs every 3 months). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Anniversary Reminder sells 1 one-off in-app purchase. PetCareOS asks for nothing beyond the download.

Anniversary Reminder ships an update every 5 weeks, PetCareOS every 3 months. The most recent releases landed on November 1, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | Anniversary Reminder | PetCareOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/anniversary-reminder/id614159715/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 46.2% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 5 weeks** | Every 3 months |
| Monetization | Free with in-app purchases | — |
| Size | 18 MB | 4 MB |
| Requires iOS | **26.0** | 26.2 |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 12+ |
| Developer | [aill, k.k. (JP)](https://appshunter.io/developer/293879399) | [Norbi Liron](https://appshunter.io/developer/1891136800) |

## What reviewers say

### Anniversary Reminder

[App page](https://appshunter.io/ios/app/anniversary-reminder/id614159715)

Never miss important dates again! This app helps you manage and receive advance notifications for upcoming birthdays and anniversaries. It can track yearly events as well as specific day milestones like 100 or 1000 days from an event.

**Highlights:** Manages upcoming birthdays and anniversaries, Provides advance reminders, Tracks yearly and specific day milestones (e.g., 100 days), Displays events on iPhone calendar, Convenient for marking round number anniversaries

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $1.99 | one-time |


### PetCareOS

[App page](https://appshunter.io/ios/app/petcareos/id6761731682)

**In-app purchases:** none


## Frequently asked questions

### Is Anniversary Reminder free?

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

### Is PetCareOS free?

PetCareOS is free to download, with no in-app purchases.

### Do Anniversary Reminder or PetCareOS have ads?

Anniversary Reminder shows ads; PetCareOS does not.

### Which is updated more often, Anniversary Reminder or PetCareOS?

Anniversary Reminder ships an update every 5 weeks, and PetCareOS every 3 months. Most recently, Anniversary Reminder was updated on November 1, 2026 and PetCareOS on November 5, 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.*