# FidoApp vs PetCalendar

The clearest difference is ads: FidoApp at none against PetCalendar's shown. FidoApp also leads on iOS requirement (13.0 vs 15.1). PetCalendar's advantage is update cadence (every 4 days vs every 2 weeks). On price, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

FidoApp ships an update every 2 weeks, PetCalendar every 4 days. Both last shipped on October 15, 2026.

## The numbers

| Metric | FidoApp | PetCalendar |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 2 weeks | **Every 4 days** |
| Size | 40 MB | 56 MB |
| Requires iOS | **13.0** | 15.1 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carlos Manuel Alirio Castillo Torrellas](https://appshunter.io/developer/1802895552) | [Raul Cano Galvez](https://appshunter.io/developer/1840826256) |

## What reviewers say

### FidoApp

[App page](https://appshunter.io/ios/app/fidoapp/id6743444174)

**Features:** macOS Compatibility

**In-app purchases:** none


### PetCalendar

[App page](https://appshunter.io/ios/app/petcalendar/id6758570933)

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

**In-app purchases:** none


## Frequently asked questions

### Is FidoApp free?

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

### Is PetCalendar free?

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

### Do FidoApp or PetCalendar have ads?

PetCalendar shows ads; FidoApp does not.

### Which is updated more often, FidoApp or PetCalendar?

FidoApp ships an update every 2 weeks, and PetCalendar every 4 days. Most recently, FidoApp was updated on October 15, 2026 and PetCalendar on October 15, 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.*