Comparison

Diary Calendar vs Night 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

Night Calendar

This app allows you to customize your daily schedule by changing the start time of your day. Events occurring before your set start time will be displayed as part of the previous day's schedule, offering a flexible way to view your commitments.

Highlights
  • Adjustable daily start time
  • Events displayed for previous/next day
  • Flexible schedule viewing
  • Customizable time zones
Features
Read full description

A major feature of this app is the ability to change the start time of each day. If you set the start time of each day to 8 AM, events that start between midnight and 7:59 AM will be displayed as your schedule for the previous day. Also, if you set the start time of each day to 10 PM, events that start between 10 PM and 11:59 PM will be displayed as your schedule for the next day.

Screenshots

Diary Calendar4 screens
Night Calendar3 screens

Verdict

The call

The clearest difference is price: Night Calendar at Free against Diary Calendar's $2.99. Diary Calendar's advantage is ads (none vs shown) and update cadence (every 3 months vs every 8 months). On 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

Night 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

Diary Calendar ships an update every 3 months, Night Calendar every 8 months. The most recent releases landed on November 1, 2026 and November 4, 2026 respectively.

Scorecard5 real differences · 5 level
Diary Calendar versus Night Calendar: the parameters behind the verdict, then further details
ParameterDiary CalendarNight Calendar
Price$2.99Free — better
Rating—5.0 (2 ratings) — better
Positive reviews33.3% of reviews—
Number of ratings—2 — better
Update frequencyEvery 3 months — betterEvery 8 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaidAd-supported — better
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better16.6
Further details — not scored
Size14 MB19 MB
Age rating4+12+
DeveloperHans Joachim GerhardtMotoki Takahashi

Customer experience

Diary Calendar

Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

Night Calendar

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Diary Calendar

No in-app purchases

None

Night Calendar

No in-app purchases

Questions

Is Diary Calendar free?
Diary Calendar costs $2.99, with no in-app purchases.
Is Night Calendar free?
Night Calendar is free to download, with no in-app purchases.
Do Diary Calendar or Night Calendar have ads?
Night Calendar shows ads; Diary Calendar does not.
Which is updated more often, Diary Calendar or Night Calendar?
Diary Calendar ships an update every 3 months, and Night Calendar every 8 months. Most recently, Diary Calendar was updated on November 1, 2026 and Night Calendar on November 4, 2026.

Other comparisons