Comparison

Task and Project Center vs Simple Calendar

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

Head to head
About

Task and Project Center

This app helps manage tasks, projects, time, and expenses with customizable features. Log time and expenses, track task progress, and generate professional reports. Supports offline mode and receipt snapping.

Highlights
  • Task progress tracking
  • Time and expense logging
  • Receipt photo capture
  • Customizable reports
  • Offline mode
  • Data synchronization
Features
Read full description

Task and Project Center is a task, project, time, expense, and progress tracking app for professionals, freelancers, contractors, and personal work management. Create projects, assign and track tasks, monitor progress, log time and mileage, record expenses, and keep project activity organized from iPhone, iPad, and Mac. TASK & PROJECT MANAGEMENT • Create projects for customers or internal work. • Create tasks and track assignment, status, and percentage progress. • Organize time, expenses, mileage, and task activity by project. TIMESHEETS • Log business, personal, and project time. • Track billable and non-billable tasks. • Submit and approve time when required. EXPENSES • Record expenses and mileage. • Capture and attach receipt photos. • Support multiple currencies and foreign exchange workflows. • Customize expense types, payment types, merchants, currencies, and locations. PRO FEATURES • Sign in with Apple. • Work offline without requiring Wi-Fi or a data connection. • Sync data between your devices with an eligible subscription. REPORTS & CUSTOMIZATION • Create, print, email, and share professional PDF reports. • Import and export CSV files. • Add custom attributes and personalize reports for your workflow. STARKODE PRO Part of the Starkode Pro series for professionals working across iPhone, iPad, and Mac. Need help? Contact support@starkode.com. SUBSCRIPTION Starkode membership is month-to-month with no long-term contracts or cancellation fees. Cancel anytime from your device. Privacy Policy: https://starkode.com/privacy/ Terms of Use: https://starkode.com/terms/

About

Simple Calendar

Organize your tasks and schedule with a clean, minimalist interface. Plan your day using time blocks, set reminders for important events, and manage tasks in an intuitive inbox. Track your progress with daily and weekly statistics.

Highlights
  • Time blocking for daily planning
  • Specific time reminders and notifications
  • Intuitive inbox for unscheduled tasks
  • Calendar view with daily/weekly statistics
  • Customizable categories and priorities
  • Dark mode support
  • Repeating tasks
Features
Read full description

Get organized and stay on top of your tasks with Quarterplan - the ultimate minimal task management app. With a clean and minimal design, you can focus on what's important and get things done. Plan your day with ease using our unique time block feature Never forget important tasks and events with specific time reminders and notifications Stay on top of your GTD or custom workflow with our intuitive inbox feature Keep track of your progress with our calendar view and daily/weekly statistics Customize your experience with dark mode, categories, and priorities And the best part? Most features are available for free, with the option to upgrade for additional benefits such as unlimited categories and notifications. Time Blocks Quickly plan your day in 3 hour time blocks and easily check your progress throughout the day in the calendar view. Specific Time with Notification Specify a specific time and set a reminder to make sure that you don’t forget important events and tasks. Inbox Or for any tasks that doesn't have a specific time or date, or if you are following GTD or your own custom workflow then simply add tasks to your inbox. Try It - It’s Free Most of the features are available for free (calendar, inbox, checklists, notes, repeating tasks, daily and weekly statistics, dark mode, up to 5 categories and priorities), and if your require more then a subscription will give you unlimited categories and priorities, notifications, monthly statistics and cloud storage. -- FEATURES -- - CALENDAR A calendar for scheduling tasks and appointments - INBOX An inbox for ideas, lists, projects and any tasks that doesn’t have a fixed date - CHECKLISTS For when you need to break down your task into smaller actions - DARK MODE For evenings or when you want to surrender to the dark side - REPEATING TASKS Create tasks that repeat every day, week, month or year - CATEGORIES & PRIORITIES Create up to 5 custom categories and priorities to define your own workflow - STATISTICS Daily and weekly statistics gives you a clear overview of your activity -- PRO FEATURES -- - NOTIFICATIONS Reminders make sure you don’t miss anything important - CATEGORIES & PRIORITIES Create unlimited custom categories and priorities to define your own workflow - STATISTICS Monthly statistics gives you a clear overview of your activity -- Membership -- - Payment will be charged to iTunes Account at confirmation of purchase - Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period - Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal - Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase - Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable Privacy policy: https://www.quarterplan.com/privacy_policy.html Terms of use: https://www.quarterplan.com/terms_conditions.html -- MAKE IT YOURS -- Quarterplan is flexible so that you can use your own work flow and methodologies. Create your own categories and priorities so that the Inbox works for you, whether you use GTD, The Action Method, 20/80 or your own custom setup. Please feel free to contact us if you have any feedback or questions: human@raemedy.com

Screenshots

Task and Project Center4 screens
Simple Calendar4 screens

Verdict

The call

The clearest difference is review sentiment: Task and Project Center at 67% against Simple Calendar's 40%. Task and Project Center also leads on device support (4 vs 2). Simple Calendar's advantage is rating (3.3 vs 3.0) and ratings volume (10 vs 2). On price, update cadence, ads and in-app purchases 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

Both are free to download. Task and Project Center sells 3 in-app purchases, starting at $9.99 per month and Simple Calendar sells 2 in-app purchases, starting at $1.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Simple Calendar holds the better App Store score, 3.3 against 3.0. That said, the two scores are not equally well evidenced: Simple Calendar has 10 ratings behind it against 2, so its average is the more settled of the two. Written reviews complicate that: 67% of Task and Project Center's written reviews are positive against 40% of Simple Calendar's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Task and Project Center ships an update every 5 weeks, Simple Calendar every 4 weeks. The most recent releases landed on November 11, 2026 and November 2, 2026 respectively.

Scorecard5 real differences · 5 level
Task and Project Center versus Simple Calendar: the parameters behind the verdict, then further details
ParameterTask and Project CenterSimple Calendar
PriceFreeFree
Rating3.0 (2 ratings)3.3 (10 ratings) — better
Positive reviews66.7% of reviews — better40.0% of reviews
Number of ratings210 — better
Update frequencyEvery 5 weeksEvery 4 weeks — better
AdsNoNo
In-app purchasesYesYes
MonetizationFreemiumFreemium
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPod
Requires iOS15.613.4 — better
Further details — not scored
Size43 MB41 MB
Age rating4+4+
DeveloperStarkode Limited CompanyRaemedy Limited

Customer experience

Task and Project Center

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews3 reviews
Positive66.7%
Neutral0.0%
Negative33.3%

Simple Calendar

All ratings9 ratings
Positive55.6%
Neutral11.1%
Negative33.3%
Written reviews5 reviews
Positive40.0%
Neutral20.0%
Negative40.0%

In-app purchases

3 purchases

Task and Project Center

Subscriptions3
  • Premium Projects7 Days trial$9.991 Month
  • Premium Suite3 Days trial$24.991 Month
  • Premium Suite Annual$99.991 Year
2 purchases

Simple Calendar

Subscriptions2
  • Quarterplan Pro Monthly$1.991 Month
  • Quarterplan Pro Yearly$11.991 Year

Questions

Is Task and Project Center free?
Task and Project Center is free to download, with in-app purchases available.
Is Simple Calendar free?
Simple Calendar is free to download, with in-app purchases available.
Which has better reviews, Task and Project Center or Simple Calendar?
Simple Calendar is rated higher. Task and Project Center averages 3.0 out of 5 from 2 ratings, while Simple Calendar averages 3.3 from 10 ratings.
Do Task and Project Center or Simple Calendar have ads?
Neither Task and Project Center nor Simple Calendar shows ads.
Which is updated more often, Task and Project Center or Simple Calendar?
Task and Project Center ships an update every 5 weeks, and Simple Calendar every 4 weeks. Most recently, Task and Project Center was updated on November 11, 2026 and Simple Calendar on November 2, 2026.

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