# Arbitrium vs Decisly

The clearest difference is rating: Arbitrium at 4.9 against Decisly's 4.4. Arbitrium also leads on review sentiment (100% vs 67%). Decisly's advantage is update cadence (fortnightly vs every 28 months) and iOS requirement (11.0 vs 15.6). On price, ratings volume, ads and in-app purchases there is nothing between them.

Both are free to download. Arbitrium sells 1 one-off in-app purchase and Decisly sells 7 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Arbitrium holds the better App Store score, 4.9 against 4.4. Both are backed by a comparable volume of ratings — 11 and 7 respectively. Written reviews point the same way: 100% of Arbitrium's written reviews are positive against 67% of Decisly's.

Arbitrium ships an update every 28 months, Decisly fortnightly. The most recent releases landed on October 13, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | Arbitrium | Decisly |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (11 ratings)](https://appshunter.io/ios/app/arbitrium/id1369876075/reviews)** | [4.4 (7 ratings)](https://appshunter.io/ios/app/decisly-decision-helper/id1482919280/reviews) |
| Number of ratings | **11** | 7 |
| Positive reviews | **100.0% of reviews** | 66.7% of reviews |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Fortnightly** |
| Monetization | Free with in-app purchases | Freemium |
| Size | 8 MB | 20 MB |
| Requires iOS | 15.6 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Lost Project](https://appshunter.io/developer/380868134) | [Anika Seibezeder](https://appshunter.io/developer/1482918749) |

## 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 |


### Decisly

[App page](https://appshunter.io/ios/app/decisly-decision-helper/id1482919280)

This app helps you make difficult life decisions by weighing pros and cons with an importance scoring system. Explore multiple options or a random choice with premium features.

**Highlights:** Decision making with pros and cons, Importance scoring algorithm, Multiple options evaluation, Random choice generator, Premium features available

**Features:** macOS Compatibility

**In-app purchases (7)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Random decisions | $0.99 | one-time |
| Send me a small tip | $0.99 | one-time |
| Decisly Premium once | $0.99 | one-time |
| This or That decisions | $1.99 | one-time |
| Decisly Premium once | $1.99 | one-time |
| Decisly Premium once | $2.99 | one-time |
| Send me a generous tip | $3.99 | one-time |


## Frequently asked questions

### Is Arbitrium free?

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

### Is Decisly free?

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

### Which has better reviews, Arbitrium or Decisly?

Arbitrium is rated higher. Arbitrium averages 4.9 out of 5 from 11 ratings, while Decisly averages 4.4 from 7 ratings.

### Do Arbitrium or Decisly have ads?

Neither Arbitrium nor Decisly shows ads.

### Which is updated more often, Arbitrium or Decisly?

Arbitrium ships an update every 28 months, and Decisly fortnightly. Most recently, Arbitrium was updated on October 13, 2026 and Decisly on October 4, 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.*