Diary Calendar vs Project Time Tracker
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.
Project Time Tracker
This app helps freelancers and professionals meticulously track their work hours across various projects. It offers clear insights into where time is spent and includes features to prevent overworking. Data is stored locally and accessible offline.
- Project-based time tracking
- Clear statistics and work hour insights
- Offline functionality
- Time Guard to prevent overworking
- One-tap CSV export
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TIME TRACKING WITHOUT A SIGN-UP – OPEN, START, DONE. No email, no password, no account. ProjectTimeTracker records your working hours per project, works completely offline, and turns your houres into a clean timesheet. Built for freelancers, contractors and anyone with flexible hours who has to prove or bill their time – without team software and without a learning curve. HOW IT WORKS: • Create a project, hit start – the timer keeps running even if you close the app or restart your device • Live Activity on the Lock Screen and in the Dynamic Island: project, elapsed time, status at a glance • Forgot to start it? Add the hours manually afterwards • Notes and tags per entry, so every hour has a reason TIME GUARD AGAINST OVERWORK: Set a daily limit, for one project or across all of them. A progress ring shows where you stand, and when you hit the limit the app reminds you to call it a day. Other apps optimise for more billable hours. This one doesn't. INSIGHTS: • Working time by day, week, month and year • Breakdown per project • Filter by project and by any date range you choose YOUR DATA STAYS YOURS: Everything lives on your device first. Sync between iPhone and iPad runs on an anonymous device ID – you never enter personal data. IPHONE AND IPAD: One app for both. On iPad you get a real split view instead of a stretched iPhone app, two-column charts and keyboard shortcuts (⌘N, ⇧⌘N, ⌘Space). FREE TO USE: Unlimited projects, every feature, all statistics and up to 250 time entries per calendar year – free forever. PREMIUM: • Unlimited time entries • PDF timesheets to send to your clients • Export to Excel, CSV or straight into your calendar • Full JSON backup Premium is a monthly or yearly subscription, cancel anytime. Track time. Analyze work hours. Invoice with confidence. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is review sentiment: Project Time Tracker at 100% against Diary Calendar's 33%. Project Time Tracker also leads on price (Free vs $2.99) and update cadence (every 2 weeks vs every 3 months). Diary Calendar's advantage is in-app purchases (none vs 2) and iOS requirement (12.0 vs 18.0). 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
Project Time Tracker is free to download; Diary Calendar costs $2.99 up front. Project Time Tracker sells 2 in-app purchases, starting at $1.00 per month. Diary Calendar asks for nothing beyond the download.
Diary Calendar ships an update every 3 months, Project Time Tracker every 2 weeks. The most recent releases landed on September 10, 2026 and September 30, 2026 respectively.
| Parameter | Diary Calendar | Project Time Tracker |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | 33.3% of reviews | 100.0% of reviews — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 3 months | Every 2 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Devices | iPhone, iPod | iPhone, iPad |
| Requires iOS | 12.0 — better | 18.0 |
| Further details — not scored | ||
| Size | 14 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | Hans Joachim Gerhardt | Lukas Hummel |
Customer experience
Diary Calendar
Project Time Tracker
In-app purchases
Diary Calendar
No in-app purchases
Project Time Tracker
- Monthly Subscription$1.001 Month
- Yearly Subscription$9.001 Year
Questions
Is Diary Calendar free?
Is Project Time Tracker free?
Do Diary Calendar or Project Time Tracker have ads?
Which is updated more often, Diary Calendar or Project Time Tracker?
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