# Eventium vs Cognitive Biases

The clearest difference is price: Cognitive Biases at Free against Eventium's $3.99. Cognitive Biases also leads on in-app purchases (none vs 2) and rating (5.0 vs 4.7). Eventium's advantage is update cadence (every 2 weeks vs every 40 months) and ratings volume (378 vs 2). On ads, device support and iOS requirement there is nothing between them.

Cognitive Biases is free to download; Eventium costs $3.99 up front. Eventium sells 2 one-off in-app purchases. Cognitive Biases asks for nothing beyond the download.

Cognitive Biases holds the better App Store score, 5.0 against 4.7. That said, the two scores are not equally well evidenced: Eventium has 378 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 85% of Eventium's written reviews are positive against 100% of Cognitive Biases's.

Eventium ships an update every 2 weeks, Cognitive Biases every 40 months. The most recent releases landed on October 26, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | Eventium | Cognitive Biases |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [4.7 (378 ratings)](https://appshunter.io/ios/app/eventium/id1029420817/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/cognitive-biases/id1535402725/reviews)** |
| Number of ratings | **378** | 2 |
| Positive reviews | 85.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 40 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 50 MB | 22 MB |
| Requires iOS | 16.0 | 16 |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [johnhair.com](https://appshunter.io/developer/534507614) | [Shapes.io Limited](https://appshunter.io/developer/1535402727) |

## What reviewers say

### Eventium

[App page](https://appshunter.io/ios/app/eventium/id1029420817)

This calendar app offers a revolutionary way to view your schedule, displaying actual events instead of just dots. It provides multiple view options, integrated task management, and advanced event customization. Widgets are available for quick access to upcoming events.

**Highlights:** Month, week, and day views, Vertical scrolling month view, Integrated tasks within calendar, Calendar widgets for home screen, Event customization (alerts, repeats, colors), Cut, copy, and paste events, Supports multiple calendar accounts

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Tasks, Reminders, To Do Lists | $0.99 | one-time |
| Calendar Widgets | $1.99 | one-time |

**What reviewers like**

- 👍 Easy to use
- 🚀 Highly customizable
- 🚀 Excellent calendar and task management
- 👍 Reliable and dependable
- 👍 Great customer support

**What reviewers complain about**

- 🐛 Occasional crashes or freezing
- 🐛 Issues with syncing and data loss
- 🔍 Limited sharing and collaboration features

**Reported bugs**

- Duplicate holidays appearing
- Inconsistent event time display
- Disappearing past events

**Requested features**

- Dark mode option
- Improved task management and integration
- Shared calendars and family/group features
- Better widget and Apple Watch support


### Cognitive Biases

[App page](https://appshunter.io/ios/app/cognitive-biases/id1535402725)

Explore common cognitive biases with clear explanations and visual examples. This tool helps UX designers, product managers, and decision-makers refine their instincts and make more informed choices.

**Highlights:** Curated list of cognitive biases, Visual illustrations for each bias, Concise, jargon-free explanations, Bookmark favorite biases, Tailored for product design and management

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Eventium free?

Eventium costs $3.99, and also offers in-app purchases.

### Is Cognitive Biases free?

Cognitive Biases is free to download, with no in-app purchases.

### Which has better reviews, Eventium or Cognitive Biases?

Cognitive Biases is rated higher. Eventium averages 4.7 out of 5 from 378 ratings, while Cognitive Biases averages 5.0 from 2 ratings.

### Do Eventium or Cognitive Biases have ads?

Neither Eventium nor Cognitive Biases shows ads.

### Which is updated more often, Eventium or Cognitive Biases?

Eventium ships an update every 2 weeks, and Cognitive Biases every 40 months. Most recently, Eventium was updated on October 26, 2026 and Cognitive Biases on October 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*