Vimcal vs Duckbill
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Vimcal
This calendar app streamlines scheduling for busy professionals and teams using AI and intuitive features. It offers agentic scheduling, time zone management, and a clean interface to boost productivity.
- Agentic scheduling with AI
- Time zone conversion (Time Travel)
- Availability sharing (Slots)
- Meeting decluttering (Rainbow Events)
- Fast and intuitive UI
- Team scheduling capabilities
Read full descriptionHide full description
Vimcal is the ultimate calendar designed for busy professionals and their teams. We invested two years into understanding the pain points of our first 10,000 users through 1:1 Zoom calls. This allowed us to map out all the different scenarios of corporate scheduling. The result? The world's fastest and most intuitive calendar app, built to streamline scheduling and boost your productivity at work, as well as the most robust harness for agentic scheduling. In Vimcal, you can accomplish anything you would in another calendar, but in half the steps or fewer and with no error. AGENTIC SCHEDULING Scheduling with voice, screenshots, or your AI personal assistant. Vimcal holds proprietary context about your meetings such as whether it's internal vs external, how important it is, or how many times it's already been rescheduled. Vimcal provides you the sturdiest guardrails for your time. BUILT FOR TEAMS Scheduling with your team is so much more complicated than just seeing what's open or blocked on the calendar. When your entire team uses Vimcal, all of Vimcal's context allows for the most accurate scheduling that aligns with everyone's schedules. NO MORE TIME ZONE PROBLEMS Time Travel — Find the best time between you and any other time zone in the world without any mental math. SCHEDULE WITH A PERSONAL TOUCH Slots — Sending a booking link feels transactional, but typing out your free times instead is tedious. Get the best of both worlds with our drag-and-copy availability feature! DECLUTTER BEAUTIFULLY Rainbow Events — No one likes seeing a full calendar. Let Vimcal take care of unnecessary meetings and declutter your mind. BUTTERY SMOOTH EVERYTHING 100ms Rule — We obsessively test every tap and interaction to give you the silkiest, fastest mobile experience. Upgrade your productivity and take control of your schedule with Vimcal. Download now and revolutionize the way you manage your time.
Duckbill
This app offers human-led, AI-enhanced personal assistance for everyday tasks and life administration. It handles everything from prescription refills and appointment booking to travel arrangements and bill management, freeing up your time.
- Human-led AI-enhanced assistance
- Task execution for daily chores
- Life administration management
- Prescription refill coordination
- Birthday card and gift sending
- Passport renewal services
- Travel booking and coordination
- Grocery delivery setup
Read full descriptionHide full description
Duckbill is an executive assistant for your personal life, led by expert humans and enhanced with AI superpowers. We provide life support by taking over the execution of dreaded everyday tasks and endless life admin. Just tell us what you need, like: - I’m having trouble finding my Rx in stock anywhere, can you call around to pharmacies and have it delivered monthly? - Can you put my friends and family's birthdays on my calendar, and send each one a handwritten card from me every year? - Renew my passport, please. - Can you review my calendar and book me a trip to/from the airport for each flight? - Send me new recipes each week and set up an ongoing grocery delivery so I have what I need for each one. - Can you call my health insurance and sort out this medical bill? I don’t have time to wait on hold. Then, our team of copilots will get to work! We’ll ask the right questions to get it done. We promise: we’re always aiming to take the burden off of you. With just a bit of info from you, we’ll start to anticipate your to-do’s and stay one step ahead. The more we get to know you, the better Duckbill gets. It feels good to let go, doesn’t it?
Screenshots
Verdict
The clearest difference is rating: Vimcal at 4.7 against Duckbill's 4.3. Vimcal also leads on monetization model (free vs ad-supported) and ratings volume (470 vs 70). Duckbill's advantage is review sentiment (74% vs 52%) and iOS requirement (15.1 vs 26.1). 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
Vimcal holds the better App Store score, 4.7 against 4.3. That said, the two scores are not equally well evidenced: Vimcal has 470 ratings behind it against 70, so its average is the more settled of the two. Written reviews complicate that: 52% of Vimcal's written reviews are positive against 74% of Duckbill's, so the app with the better star average is not the one people write more warmly about.
Vimcal ships an update every 6 days, Duckbill weekly. Both last shipped on November 3, 2026.
| Parameter | Vimcal | Duckbill |
|---|---|---|
| Price | Free | Free |
| Rating | 4.7 (470 ratings) — better | 4.3 (70 ratings) |
| Positive reviews | 52.2% of reviews | 74.4% of reviews — better |
| Number of ratings | 470 — better | 70 |
| Update frequency | Every 6 days — better | Weekly |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free — better | Ad-supported |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.1 | 15.1 — better |
| Further details — not scored | ||
| Size | 73 MB | 116 MB |
| Age rating | 4+ | 4+ |
| Developer | Vimcal Inc. | Duckbill Technologies, Inc. |
Customer experience
Vimcal
Duckbill
User reviews
Vimcal
From 470 App Store ratingsWhat we love
- 🚀 Fast and efficient
- 🤝 Great for managing multiple calendars
- ⏱️ Helpful time zone features
- 💻 Powerful desktop app
- 🎨 Clean and intuitive UI
Room to improve
- 🐛 Bugs with date/time navigation
- 🔌 No offline support
- 🔍 Difficult to find/add local calendars
- 🔀 Issues with Google/Microsoft account integration
- 📱 Laggy and buggy mobile app
Duckbill
From 70 App Store ratingsWhat we love
- ✨ Saves significant time
- 🤝 Acts as a helpful partner
- 💯 Efficient task completion
- 💡 Great for ADHD/organization
- 💖 Humans care about users
Room to improve
- 📉 Task completion inconsistent
- 💸 Misleading completion rates advertised
- 💰 Frequent requests for extra payment
- 💳 Auto-deducted money without permission
- 💸 Expensive for the value
Bugs and requests
Vimcal
Reported bugs
4 issues- Scheduling links broken
- Randomly deleting meetings
- Inability to update meeting details
- Widget not showing all events
Requested features
5 requests- Integration with iCloud and other calendar services
- Full year view
- Better widget functionality
- Ability to feed external data into the calendar
- Apple Watch support
Duckbill
Reported bugs
5 issues- No way to resolve billing issues on mobile
- Service went down due to billing issue with no quick fix
- Login screen freezes (inferred from billing issue)
- Incompatible with older devices (inferred from general app issues)
- Home screen features gone
Requested features
8 requests- Ensure tasks are completed within scope
- Humans can't get paid until task is marked complete by user with 5 stars
- Flat, predictable pricing plan instead of credits
- Bring back unique and useful app features
- Automate more features with agents
Show 3 moreShow fewer
- Build multi-action agents (shopping, calendar management, bookings)
- Lower prices
- Improve app cleanups (e.g., password prompts)
In-app purchases
Vimcal
No in-app purchases
Duckbill
No in-app purchases









