# SPC Sign vs Arbitrium

The clearest difference is in-app purchases: SPC Sign at none against Arbitrium's 1. SPC Sign also leads on update cadence (every 8 months vs every 28 months) and iOS requirement (12.3 vs 15.6). On price, ads and device support there is nothing between them.

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

SPC Sign ships an update every 8 months, Arbitrium every 28 months. The most recent releases landed on October 7, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SPC Sign | Arbitrium |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 8 months** | Every 28 months |
| Monetization | — | Free with in-app purchases |
| Size | 28 MB | 8 MB |
| Requires iOS | **12.3** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Aruba S.p.A.](https://appshunter.io/developer/461429240) | [The Lost Project](https://appshunter.io/developer/380868134) |

## What reviewers say

### SPC Sign

[App page](https://appshunter.io/ios/app/spc-sign/id1320911019)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is SPC Sign free?

SPC Sign is free to download, with no in-app purchases.

### Is Arbitrium free?

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

### Do SPC Sign or Arbitrium have ads?

Neither SPC Sign nor Arbitrium shows ads.

### Which is updated more often, SPC Sign or Arbitrium?

SPC Sign ships an update every 8 months, and Arbitrium every 28 months. Most recently, SPC Sign was updated on October 7, 2026 and Arbitrium on October 24, 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.*