# Diary Calendar vs Backup Calendar

The clearest difference is price: Backup Calendar at Free against Diary Calendar's $2.99. Diary Calendar's advantage is ads (none vs shown) and iOS requirement (12.0 vs 18.6). On update cadence, in-app purchases and device support there is nothing between them.

Backup Calendar is free to download; Diary Calendar costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly every 3 months. The most recent releases landed on October 15, 2026 and October 20, 2026 respectively.

## The numbers

| Metric | Diary Calendar | Backup Calendar |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 3 months | Every 3 months |
| Monetization | Paid | — |
| Size | 14 MB | 16 MB |
| Requires iOS | **12.0** | 18.6 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 12+ |
| Developer | [Hans Joachim Gerhardt](https://appshunter.io/developer/320239954) | [Motoki Takahashi](https://appshunter.io/developer/1411233238) |

## What reviewers say

### Diary Calendar

[App page](https://appshunter.io/ios/app/diary-calendar/id397426336)

This calendar app supports the ICS standard for seamless integration with PC calendar software like Outlook and Lightning. It offers detailed date and monthly overviews, allows for time zone-specific appointments, and enables the creation of both one-off and recurring events.

**Highlights:** ICS standard compatibility, Date and monthly overviews, Time zone management, Recurring event creation, Searchable appointment list, External data storage

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

**In-app purchases:** none


### Backup Calendar

[App page](https://appshunter.io/ios/app/backup-calendar/id6754521669)

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

**In-app purchases:** none


## Frequently asked questions

### Is Diary Calendar free?

Diary Calendar costs $2.99, with no in-app purchases.

### Is Backup Calendar free?

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

### Do Diary Calendar or Backup Calendar have ads?

Backup Calendar shows ads; Diary Calendar does not.

### Which is updated more often, Diary Calendar or Backup Calendar?

Diary Calendar ships an update every 3 months, and Backup Calendar every 3 months. Most recently, Diary Calendar was updated on October 15, 2026 and Backup Calendar on October 20, 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.*