Comparison

Diary Calendar vs LazyTask

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

LazyTask

Features
Read full description

LazyTask is the to-do app for people who are truly lazy at heart. Key Features 1. Voice Input for Effortless Task Creation Just speak to add tasks - no typing required! 2. AI-Powered Task Organization Our AI analyzes your words and organizes them into appropriate tasks. 3. Simple and User-Friendly Interface We've removed complex operations. Anyone can use it intuitively. 4. Task Scheduling Easily set future tasks. Never forget with our reminder system. 5. Task Completion Reflection Experience a sense of achievement with our task completion record feature. Even if you're a professional procrastinator, you can manage tasks effortlessly with this app. Just by talking, your to-dos get organized and suggested to you, significantly reducing the burden of task management. From daily chores to long-term goals, this is a new type of to-do app that supports your lifestyle. Want to make your life a little more productive without changing your lazy self? Give LazyTask a try!

Screenshots

Diary Calendar4 screens
LazyTask1 screens

Verdict

The call

The clearest difference is price: LazyTask at Free against Diary Calendar's $2.99. LazyTask also leads on update cadence (weekly vs every 3 months). Diary Calendar's advantage is in-app purchases (none vs 3) and iOS requirement (12.0 vs 17.5). On ads 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

LazyTask is free to download; Diary Calendar costs $2.99 up front. LazyTask sells 3 in-app purchases, starting at $0.99 per 7 days. Diary Calendar asks for nothing beyond the download.

UpkeepUpdate frequency

Diary Calendar ships an update every 3 months, LazyTask weekly. The most recent releases landed on September 10, 2026 and May 16, 2026 respectively.

Scorecard4 real differences · 4 level
Diary Calendar versus LazyTask: the parameters behind the verdict, then further details
ParameterDiary CalendarLazyTask
Price$2.99Free — better
Positive reviews33.3% of reviews—
Update frequencyEvery 3 monthsWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaid—
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better17.5
Further details — not scored
Size14 MB2 MB
Age rating4+4+
DeveloperHans Joachim GerhardtPalpa

In-app purchases

None

Diary Calendar

No in-app purchases

3 purchases

LazyTask

Subscriptions3
  • 1 week Trial$0.997 Days
  • 1 month Plan$2.991 Month
  • 3 month Plan$6.993 Months

Questions

Is Diary Calendar free?
Diary Calendar costs $2.99, with no in-app purchases.
Is LazyTask free?
LazyTask is free to download, with in-app purchases available.
Do Diary Calendar or LazyTask have ads?
Neither Diary Calendar nor LazyTask shows ads.
Which is updated more often, Diary Calendar or LazyTask?
Diary Calendar ships an update every 3 months, and LazyTask weekly. Most recently, Diary Calendar was updated on September 10, 2026 and LazyTask on May 16, 2026.

Other comparisons