Extreme Calendar vs Clock In For Work
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Extreme Calendar
This powerful calendar app offers advanced views and flexible event management for busy individuals. It integrates with native calendar data and provides quick event entry, with options to expand functionality through in-app purchases.
- Advanced calendar views (Year, Month, Week, Day, Agenda)
- Birthdays and Anniversaries from contacts
- Advanced repeating event options
- Move/Copy Events
- Natural Language Entry
- Event Templates
- Syncs with native calendar data
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One of the most powerful calendars on iOS. Advanced views with plenty of options all designed for speed and flexibility. You wont get this much information at a glance from any other calendar, and adding events in-line allows you to get in and out and on with your busy day. Based on Extreme Agenda, it gives you the powerful calendar based views you want at a low price, and allows you to purchase the other features of the full Organizer once you need them. Features Include: Great Calendaring • Powerful views including Year, Month, Week, Upcoming Agenda List, and Day. • Pull Birthdays and Anniversaries from your contacts with pictures. • Advanced repeating event options. • Move/Copy Events • Military time, ISO week, and week start options. • Uses and expands on your native calendar data. • Sync like you would with the default calendar(Google, iCloud, Exchange). • Next month preview option on Month View • Uses time bars and icons to keep you informed at a glance • Put event text right on calendar • Filter events based on iCal calendars. • Almost 200 professional icons to mark your events • Natural Language Entry • Event Templates • Email Events • Drag-n-Drop Events Power and Flexibility • Universal Support • TextExpander Support • Portrait and Landscape Support. • Retina and iPhone 5 Display Support. • Background and color theme choices. • Help System • Easily upgraded to Extreme Agenda Planner --------------------------------------- InApp Purchase When you are ready to upgrade just pay the difference and your Extreme Calendar becomes Extreme Agenda. Doing so adds powerful contact, task, note, and list views along with search, weather, private filtering, a status coloring choice, and over 800 more icons. And it adds categories for coloring, icons, and advanced filtering. Otherwise if you want it all now, look for 'Extreme Agenda' in the AppStore. ------------------------------------- Interface You can tap-h-hold in the main calendar days and in the time area of the timeline day view for an 'add and paste' toolbar. Copy/Move, used with the paste, are in the toolbar on each event in timeline day. ------------------------------------- Tech Support / Reviews Please email us with feature suggestions, bug reports, or you can't figure something out instead of using the reviews if you are rating low, its not good practice to get what you want. Or find Extreme Agenda on Facebook or give @birdsoft a shout out on Twitter and let us know there! We address most problems reported right away if they really are problems and will help you find a solution. We also list known problems on our site and how they are being resolved. If you like the app and it works fine for you and/or we worked to get in the features you requested please leave a review to let people know. We're working hard to give you everything you want in a calendar. -------------------------- Get Organized. Go Extreme!
Clock In For Work
Easily track your work hours for projects. This tool allows for simple administration of your time, including adding holidays and sick days. Export and import your working hours data in CSV format.
- Calculate working hours
- Project time tracking
- Add holidays and sick days
- Export/import as CSV
- Easy administration
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A tool to calculate your working hours for a project. Easy to administer your hours. Add holidays or sickdays. Export and import your working hours as csv.
Screenshots
Verdict
The clearest difference is in-app purchases: Clock In For Work at none against Extreme Calendar's 1. Clock In For Work also leads on review sentiment (100% vs 73%) and price ($2.99 vs $7.99). Extreme Calendar's advantage is ratings volume (24 vs 5) and iOS requirement (12.0 vs 16.0). On rating, 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
Extreme Calendar costs $7.99 and Clock In For Work $2.99 up front. Extreme Calendar sells 1 one-off in-app purchase. Clock In For Work asks for nothing beyond the download.
On the App Store both sit at effectively the same score — 4.3 for Extreme Calendar against 4.4 for Clock In For Work. Both are backed by a comparable volume of ratings — 24 and 5 respectively. Written reviews are what separate them: 73% of Extreme Calendar's written reviews are positive against 100% of Clock In For Work's.
Extreme Calendar ships an update every 4 months, Clock In For Work every 5 weeks. Both last shipped on October 29, 2026.
| Parameter | Extreme Calendar | Clock In For Work |
|---|---|---|
| Price | $7.99 | $2.99 — better |
| Rating | 4.3 (24 ratings) | 4.4 (5 ratings) — better |
| Positive reviews | 73.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 24 — better | 5 |
| Update frequency | Every 4 months | Every 5 weeks — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases — better | Paid |
| Best chart rank | — | #98 — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 12.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 30 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Birdsoft LLC | H Hubeek |
Customer experience
Extreme Calendar
Clock In For Work
Bugs and requests
Extreme Calendar
Reported bugs
15 issues- App crashes on launch or during use
- Events disappearing without explanation
- Bouncy event creation window causing data loss
- Syncing failures between iPhone and iPad
- App becomes unresponsive with large contact lists
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- Notifications interrupt and reset event creation
- Recurring events not functioning properly
- Cannot delete certain categories
- Appointments not saving
- Deleted items still appearing in calendar
- Swipe navigation not working reliably
- Copy/paste functionality slow and unreliable
- App crashes when trying to edit recurring events
- Categories not syncing across devices
- Blank screen on iPad
Requested features
15 requests- More diverse icon options
- Better alarm/reminder sound variety
- Ability to display notes in monthly view
- Drag-and-drop appointment editing
- Double-tap to create appointments
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- Larger icon display options
- Geographic data integration for addresses
- Contact integration with events
- Last occurrence of month recurring option (e.g., last Wednesday)
- Alphabetizable/sortable menus
- UK date format support
- Two-month detailed view option
- Auto-scroll to current time in daily view
- More color options
- Picture/photo support in notes
Clock In For Work
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Extreme Calendar
- Extreme Agenda$3.99
Clock In For Work
No in-app purchases






