# YearRound vs UnitStack

The clearest difference is in-app purchases: UnitStack at none against YearRound's 4. UnitStack also leads on update cadence (every 2 days vs every 6 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. YearRound sells 4 one-off in-app purchases. UnitStack asks for nothing beyond the download.

YearRound ships an update every 6 months, UnitStack every 2 days. The most recent releases landed on October 1, 2026 and October 4, 2026 respectively.

## The numbers

| Metric | YearRound | UnitStack |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/unitstack/id6757423947/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 6 months | **Every 2 days** |
| Monetization | — | Free |
| Size | 6 MB | 4 MB |
| Requires iOS | **17.0** | 18.6 |
| Devices | **iPhone, iPad, Vision Pro** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [ShiftVision](https://appshunter.io/developer/597858653) | [Michael Yang](https://appshunter.io/developer/1866843188) |

## What reviewers say

### YearRound

[App page](https://appshunter.io/ios/app/yearround/id6458589035)

**Features:** macOS Compatibility

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 2024 Poster | $0.99 | one-time |
| 2023 Poster | $0.99 | one-time |
| 2026 Poster | $4.99 | one-time |
| 2025 Poster | $4.99 | one-time |


### 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 YearRound free?

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

### Is UnitStack free?

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

### Do YearRound or UnitStack have ads?

Neither YearRound nor UnitStack shows ads.

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

YearRound ships an update every 6 months, and UnitStack every 2 days. Most recently, YearRound was updated on October 1, 2026 and UnitStack 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.*