Diary Calendar vs LazyTask
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- ICS standard compatibility
- Date and monthly overviews
- Time zone management
- Recurring event creation
- Searchable appointment list
- External data storage
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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.
LazyTask
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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
Verdict
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
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.
Diary Calendar ships an update every 3 months, LazyTask weekly. The most recent releases landed on September 10, 2026 and May 16, 2026 respectively.
| Parameter | Diary Calendar | LazyTask |
|---|---|---|
| Price | $2.99 | Free — better |
| Positive reviews | 33.3% of reviews | — |
| Update frequency | Every 3 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | — |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 12.0 — better | 17.5 |
| Further details — not scored | ||
| Size | 14 MB | 2 MB |
| Age rating | 4+ | 4+ |
| Developer | Hans Joachim Gerhardt | Palpa |
In-app purchases
Diary Calendar
No in-app purchases
LazyTask
- 1 week Trial$0.997 Days
- 1 month Plan$2.991 Month
- 3 month Plan$6.993 Months









