# ArrowsJudge vs UnitStack

The clearest difference is update cadence: UnitStack at every 2 days against ArrowsJudge's every 2 months. ArrowsJudge's advantage is iOS requirement (14.0 vs 18.6). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

ArrowsJudge ships an update every 2 months, UnitStack every 2 days. The most recent releases landed on October 8, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | ArrowsJudge | UnitStack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/unitstack/id6757423947/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 2 days** |
| Monetization | — | Free |
| Size | 16 MB | 4 MB |
| Requires iOS | **14.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Scott Johnson](https://appshunter.io/developer/580251998) | [Michael Yang](https://appshunter.io/developer/1866843188) |

## What reviewers say

### ArrowsJudge

[App page](https://appshunter.io/ios/app/arrowsjudge/id6444597351)

**Features:** macOS Compatibility

**In-app purchases:** none


### UnitStack

[App page](https://appshunter.io/ios/app/unitstack/id6757423947)

This utility app allows for simultaneous unit and currency conversions, saving your progress and custom units. Its minimalist design ensures a clear and efficient user experience for all your measurement needs.

**Highlights:** Stack multiple conversions, Persistent values, Custom units of measure, Minimalist interface, Custom color themes, Currency conversion

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is ArrowsJudge free?

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

### Is UnitStack free?

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

### Do ArrowsJudge or UnitStack have ads?

Neither ArrowsJudge nor UnitStack shows ads.

### Which is updated more often, ArrowsJudge or UnitStack?

ArrowsJudge ships an update every 2 months, and UnitStack every 2 days. Most recently, ArrowsJudge was updated on October 8, 2026 and UnitStack on October 21, 2026.

---

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