Comparison

Arbitrium vs Vimcal

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

Head to head
About

Arbitrium

This app assists in making rational decisions by allowing you to define criteria and rate your options. It uses a weighted decision matrix to help you identify the best choice for various life scenarios.

Highlights
  • Define decision criteria
  • Rate available options
  • Weighted decision matrix
  • Identify best choice
  • Save and manage decisions
Features
Read full description

We often have to take decisions. Arbitrium is an app that will help you take the right one in a simple and rational way. Establish the criteria you need to consider and then rate each option you have available. The option with the highest score will be the best one. Arbitrium is based on the weighted decision matrix concept and will help you take decisions such as: Which car should I buy? Which bank should I choose for a mortgage? Where should I go on vacation? Which job offer should I accept? Which nursery should I choose for my child?

About

Vimcal

This calendar app streamlines scheduling for busy professionals and teams. It offers AI-powered scheduling, time zone management, and a clean interface to boost productivity and reduce meeting clutter.

Highlights
  • AI-powered scheduling
  • Time zone conversion (Time Travel)
  • Availability sharing (Slots)
  • Meeting decluttering (Rainbow Events)
  • Fast and intuitive interface
  • Team scheduling capabilities
Features
Read 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.

Screenshots

Arbitrium4 screens
Vimcal4 screens

Verdict

The call

The clearest difference is review sentiment: Arbitrium at 100% against Vimcal's 52%. Arbitrium also leads on rating (4.9 vs 4.7) and iOS requirement (15.6 vs 26.1). Vimcal's advantage is in-app purchases (none vs 1) and update cadence (every 5 days vs every 28 months). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Arbitrium sells 1 one-off in-app purchase. Vimcal asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Arbitrium holds the better App Store score, 4.9 against 4.7. That said, the two scores are not equally well evidenced: Vimcal has 469 ratings behind it against 11, so its average is the more settled of the two. Written reviews point the same way: 100% of Arbitrium's written reviews are positive against 52% of Vimcal's.

UpkeepUpdate frequency

Arbitrium ships an update every 28 months, Vimcal every 5 days. The most recent releases landed on November 2, 2026 and November 7, 2026 respectively.

Scorecard7 real differences · 3 level
Arbitrium versus Vimcal: the parameters behind the verdict, then further details
ParameterArbitriumVimcal
PriceFreeFree
Rating4.9 (11 ratings) — better4.7 (469 ratings)
Positive reviews100.0% of reviews — better52.2% of reviews
Number of ratings11469 — better
Update frequencyEvery 28 monthsEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.6 — better26.1
Further details — not scored
Size8 MB73 MB
Age rating4+4+
DeveloperThe Lost ProjectVimcal Inc.

Customer experience

Arbitrium

All ratings11 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews10 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Vimcal

All ratings469 ratings
Positive91.0%
Neutral2.1%
Negative6.8%
Written reviews67 reviews
Positive52.2%
Neutral10.4%
Negative37.3%

Bugs and requests

Arbitrium

Not enough reviews yet to summarise bugs or 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

In-app purchases

1 purchases

Arbitrium

One-time1
  • PRO Mode$0.99
None

Vimcal

No in-app purchases

Questions

Is Arbitrium free?
Arbitrium is free to download, with in-app purchases available.
Is Vimcal free?
Vimcal is free to download, with no in-app purchases.
Which has better reviews, Arbitrium or Vimcal?
Arbitrium is rated higher. Arbitrium averages 4.9 out of 5 from 11 ratings, while Vimcal averages 4.7 from 469 ratings.
Do Arbitrium or Vimcal have ads?
Neither Arbitrium nor Vimcal shows ads.
Which is updated more often, Arbitrium or Vimcal?
Arbitrium ships an update every 28 months, and Vimcal every 5 days. Most recently, Arbitrium was updated on November 2, 2026 and Vimcal on November 7, 2026.

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