Anniversary Reminder vs PetCareOS
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Anniversary Reminder
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.
- 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
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Never forget anniversaries again!! This app manages all the upcoming birthdays and important anniversaries and reminds you of them in advance. Not only keeps track of anniversaries which come once a year but also it can remind you of the 100 days or 1000 days from a specific event. For example, you can easily celebrate the 100th day anniversary of the relationship with your partner. The anniversaries registered on the app can be also displayed on the iPhone calendar. If you are using the calendar app, this app is highly recommended to be on your device. ■ Convenient to mark anniversary with round numbers Not many people may keep track of 100 days, 200 days, or 1000 days anniversary from a certain event. This app can manage to remind you of such hidden anniversaries. You may be able to celebrate a special day that you didn't even notice before. Register the first date with your partner, wedding anniversary, your child's birthday, or the day you first met your special person, and discover new anniversaries to celebrate. ■ Easy to view on iPhone calendar When activating the "Display in iOS calendar" option shown on the settings, the "Anniversary Reminder" calendar will be created on the iPhone calendar. You will never miss important birthdays and anniversaries as you manage them together with your daily schedule. ■ Notes We can't respond to reviews, so please contact our support team for issues or suggestions directly from the gear icon on the upper left corner of the app screen. Or please send an email to: app+ar@aill.org
PetCareOS
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PetCareOS is a private, local-first app for managing your dog’s day-to-day care. Instead of keeping vaccines, medication, reminders, documents, weight, food, and vet details across calendars, notes, photos, and messages, PetCareOS keeps everything organized in one place. What you can do with PetCareOS: • Manage reminders for treatments, vaccines, medication, and appointments • Create medication courses with daily doses and scheduled reminders • Track medical history, notes, and important care records • Store documents and files related to your dog’s care • Track food, weight, insurance, registration, and vet details • Manage more than one pet • Create manual backups and restore your data when needed PetCareOS is designed with a private, local-first approach: • No account required • No sign-in • No automatic cloud sync • Data is stored on your device • Backup and restore are manual and user-initiated Some features are available with PetCareOS Premium, including multi-pet support, backup and restore, document center, food management, insurance renewal reminders, and municipal registration/license renewal reminders. Important: PetCareOS is for organization and reminders only. It is not a substitute for veterinary advice, diagnosis, or treatment. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Anniversary Reminder | PetCareOS |
|---|---|---|
| Price | Free | Free |
| Rating | 3.0 (2 ratings) — better | — |
| Positive reviews | 46.2% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 5 weeks — better | Every 3 months |
| Ads | Yes | No — better |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 26.0 — better | 26.2 |
| Further details — not scored | ||
| Size | 18 MB | 4 MB |
| Age rating | 4+ | 12+ |
| Developer | aill, k.k. (JP) | Norbi Liron |
In-app purchases
Anniversary Reminder
- Remove Ads$1.99
PetCareOS
No in-app purchases
Questions
Is Anniversary Reminder free?
Is PetCareOS free?
Do Anniversary Reminder or PetCareOS have ads?
Which is updated more often, Anniversary Reminder or PetCareOS?
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