Comparison

Diary Calendar vs Backup Calendar

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Diary Calendar

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
Read full description

This app is suitable for calendars according to the ICS standard RFC 5545/5546,  which is used by most computer programs.  This is the prerequisite, so that you can also use your calendar from the PC  with Outlook, Lighting or other software. This calendar inherits the following functions: - Date Overview    All appointments are displayed time-dependent. The list can be searched. The list is kept on the iPhone and can be stored and loaded externally. Appointments can also be transferred from the iPhone - Monthly Overview    Monthly overview helps navigate through calendar dates quickly.  Appointments additional are listed separately.  An overview of appointments of the day couldt be called up on the screen. - Date    Appointments can include date and time or just the date.    These can be stored with or without time zone. So, for example    the date New Year should be used without time zone as the year    actually begins on earth at different times.    In contrast, a birthday with the time zone should be deposited, in    which the jubilarian lives. Thus, at the time of congratulation    nothing goes wrong. - Series date    One-off and serial appointments can be generated.    A recurring event is controlled by a rule by which the repetitive    appointments are generated. These rules fulfill the standard.    So you do not have to dive deeper into the rules, as most common rules could be created by key combination.

About

Backup Calendar

Features
Read full description

Download and save the schedule for the specified period to your device. The downloaded schedule information includes the title, location, start and end dates and times, URL, and notes. Saved schedules can be viewed on the calendar. Saved schedules can be uploaded to the specified calendar.

Screenshots

Diary Calendar4 screens
Backup Calendar3 screens

Verdict

The call

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.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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

Scorecard3 real differences · 5 level
Diary Calendar versus Backup Calendar: the parameters behind the verdict, then further details
ParameterDiary CalendarBackup Calendar
Price$2.99Free — better
Positive reviews33.3% of reviews—
Update frequencyEvery 3 monthsEvery 3 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaid—
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better18.6
Further details — not scored
Size14 MB16 MB
Age rating4+12+
DeveloperHans Joachim GerhardtMotoki Takahashi

In-app purchases

None

Diary Calendar

No in-app purchases

None

Backup Calendar

No in-app purchases

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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