# Arbitrium vs Expo Event Tracker

The clearest difference is update cadence: Expo Event Tracker at every 5 weeks against Arbitrium's every 28 months. Expo Event Tracker also leads on iOS requirement (13.0 vs 15.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Arbitrium sells 1 one-off in-app purchase and Expo Event Tracker sells 1 in-app purchase, starting at $0.99 per year. Whichever you choose, the download price is not the number that matters.

Arbitrium ships an update every 28 months, Expo Event Tracker every 5 weeks. Both last shipped on October 13, 2026.

## The numbers

| Metric | Arbitrium | Expo Event Tracker |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (11 ratings)](https://appshunter.io/ios/app/arbitrium/id1369876075/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 5 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 8 MB | 94 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [The Lost Project](https://appshunter.io/developer/380868134) | [Macrobian Games](https://appshunter.io/developer/950173977) |

## What reviewers say

### Arbitrium

[App page](https://appshunter.io/ios/app/arbitrium/id1369876075)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Mode | $0.99 | one-time |


### Expo Event Tracker

[App page](https://appshunter.io/ios/app/expo-event-tracker/id6474923702)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Year Membership | $0.99 | per year |


## Frequently asked questions

### Is Arbitrium free?

Arbitrium is free to download, with in-app purchases available.

### Is Expo Event Tracker free?

Expo Event Tracker is free to download, with in-app purchases available.

### Do Arbitrium or Expo Event Tracker have ads?

Neither Arbitrium nor Expo Event Tracker shows ads.

### Which is updated more often, Arbitrium or Expo Event Tracker?

Arbitrium ships an update every 28 months, and Expo Event Tracker every 5 weeks. Most recently, Arbitrium was updated on October 13, 2026 and Expo Event Tracker on October 13, 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.*