# UnitStack — Convert Units & Currency

> Simultaneous unit and currency converter with custom unit support. (iPhone/iPad app by Michael Yang.)

- Source: https://appshunter.io/ios/app/unitstack/id6757423947 (this page in markdown: same URL + `.md`)
- Developer: [Michael Yang](https://appshunter.io/developer/1866843188)
- Category: Utilities
- Price: Free
- Rating: 5.00/5 from 1 App Store ratings
- Age rating: 4+
- Requires: iOS 18.6 · 4 MB
- Languages: American English
- Released: 2026-01-07
- Data updated: 2026-06-04
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/unitstack/id6757423947/reviews.md

## What is UnitStack?

UnitStack lets you stack multiple unit conversions at once—so you never have to switch units or reselect conversions again.

Your conversions are always saved. Open the app and start typing.

Add custom units too—like that old reliable sauce spoon.

Built for speed and clarity

• Stack multiple conversions at once
• Persistent values — pick up where you left off
• Minimal, distraction-free interface
• Custom color themes, including your own
• Support for custom units of measure

Whether you’re comparing measurements, converting currencies, or working across systems, UnitStack keeps everything visible and friction-free.

Currency exchange rates are provided by Frankfurter (ECB reference rates).

## Key features

- Stack multiple conversions
- Persistent values
- Custom units of measure
- Minimalist interface
- Custom color themes
- Currency conversion


## Frequently asked questions about UnitStack

### What makes UnitStack unique?

UnitStack allows you to stack multiple unit and currency conversions simultaneously, saving your progress and custom units. This means you don't have to re-enter values or switch between different conversion types.

### Can I add my own units to UnitStack?

Yes, UnitStack supports custom units of measure. This feature is useful for unique or specialized measurements, like a specific cooking spoon, allowing for personalized conversion needs.

### How does UnitStack handle currency exchange rates?

Currency exchange rates in UnitStack are provided by Frankfurter, using ECB reference rates. This ensures that currency conversions are based on reliable and up-to-date financial data.

### Is UnitStack suitable for offline use?

The description does not specify offline functionality. However, its focus on persistent values and a distraction-free interface suggests it is designed for quick, on-demand use.

### What devices is UnitStack available on?

UnitStack is available on iPhone and iPad devices. It is designed to offer a seamless experience across Apple's mobile platforms.

### How often is UnitStack updated?

UnitStack was last updated on January 12, 2026, with version 1.2. This indicates a recent update, suggesting ongoing development and support from the developer.

### What is the age rating for UnitStack?

UnitStack has an age rating of 4+. This means it is suitable for users of all ages, with no content restrictions.

### Does UnitStack have ads?

No, UnitStack is ad-free. The application is free to download and use without any advertisements interrupting the user experience.

## Version history (last 3 releases)

### 1.2 — 2026-01-12

Support iOS 18

### 1.1 — 2026-01-10

More units of measure
You can now enter custom units of measure
Slide right to swap units

### 1.0 — 2026-01-07

No release notes.

## More apps by Michael Yang

- [MazeHop](https://appshunter.io/ios/app/mazehop/id6757651304)
- [Layers: Weather to Wear](https://appshunter.io/ios/app/layers-weather-to-wear/id6758438823)

All apps by Michael Yang: https://appshunter.io/developer/1866843188

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-04.*