# Shift Unit — Unit & Currency Converter

> Comprehensive unit and currency converter with extensive features and precision. (iPhone/iPad app by Didier Burton.)

- Source: https://appshunter.io/ios/app/shift-unit/id1514037983 (this page in markdown: same URL + `.md`)
- Developer: [Didier Burton](https://appshunter.io/developer/1514037982)
- Category: Utilities, Productivity
- Price: Free
- Rating: 5.00/5 from 21 App Store ratings · 9 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 20 MB
- Languages: American English
- Released: 2020-07-15
- Data updated: 2026-09-06
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/shift-unit/id1514037983/reviews.md

## What is Shift Unit?

Shift Unit is a unit converter designed with usability and numerical precision in mind. It features 1400+ conversion units across 34 categories. It works great in light or dark mode, and as a Home Widget w/ localized number displays.
Independent WatchOS app and complications.

Operations can be carried out in portrait mode in simple precision (7 significant digits,) or in landscape mode in double precision (14 significant digits.)
Conversion formulae use exact definitions of related entities--not approximations.
Wikipedia page information can be pulled for categories and conversion units. (Look for info circle.)

The custom keypad has a calculator mode, and allows to enter/edit numbers on either side of the conversion.
Unit categories include Acceleration, Angle, Area, Bit Rate, Clock, Online Currencies, Data Storage, Area Density, Volumetric Density, Electric Charge, Electric Current, Energy, Volumetric Flow Rate, Force, Frequency, Fuel, Length, Luminance, Lux, Mass Flow Rate, Momentum, Power, Pressure, Radiation Dose, Radioactivity, Radiation Exposure, Speed, Temperature, Temperature Delta, Time, Torque, Typography, Volume, and Weight.

Features:
- One screen operation minimizing number of gestures
- Numbers (digits, decimal/grouping separators, exponent)/time/country names localized to your (or any) region
- Current time in 2 out of 439 world cities and see your cities pinned on a flyover map, an educational way of discovering the world through time zones
- Weather conditions and forecast for time zone cities
- Dedicated accessibility labels and hints for VoiceOver operations
- Customizable number entry timeout allowing to enter a new number without having to clear the field. (Turned off when an accessibility feature, e.g. VoiceOver, is on)
- Customizable user interface (preferred categories; user interface alignment for left/right-handed entry or 2-thumb operations)
- Ability to swap units while keeping initial numerical entry
- Category presets for quick change of context, including user preset
- Long-press category button to remove, or add a category on the fly
- Long-press number field for copy/paste
- Paste Mathematical constants (Pi, e, etc.)
- Education via Wikipedia pages for categories and conversion units
- Currency conversions using online rates
- Searchable list of currency rates with possibility to change base rate
- Set favorite currencies
- Built-in numeric keypad (with calculator mode) to enter numbers on either side of the conversion
- Long-press delete key to clear the field in focus
- Engineering number format handling
- Infinity and negative numbers handling
- 7 or 14-digit precision displays (3-digit fractions for currencies) 
- Searchable list of 1400+ conversion units across 34 categories
- On-boarding screens for general operations and for the Currency category (turned off when VoiceOver is on)
- Home widget for quick conversions using units selected in the hosting app

Happy Conversions!

## Key features

- 1400+ conversion units
- 34 categories
- Light/dark mode support
- Home widget
- Apple Watch app
- Custom keypad with calculator
- Wikipedia integration

## Recent user reviews (9 of 9)

All indexed reviews: https://appshunter.io/ios/app/shift-unit/id1514037983/reviews.md

### 5/5 — Fantastic app

*2024-10-16*

A Swiss Army knife of unit conversions! Allows customizing what units to convert so you don't need to scroll through long lists of possible choices.  Currencies update automatically. Developer responds to feedback. Five Stars!

**Developer response:** Dear User,
Thank you for your feedback and for using our app! Denver (Mountain Time) is indeed included in the list of time zones. As a major timezone, it is set as a favorite by default (with a star) and can be found at the top of the list, between Chicago and Los Angeles. This might have caused some confusion since it does not appear in the alphabetically sorted list that follows. We hope this clears things up!
Best regards,
--Shift Unit

### 5/5 — Denver and Mountain time missing from Clock section of app

*2024-10-07*

Great app! For some reason Denver and the option to choose Mountain time is missing in the huge list of cities in the Clock section of the app. As far as I can see, there’s no way to choose Mountain time.

**Developer response:** Dear User,
Thank you for your feedback and for using our app! Denver (Mountain Time) is indeed included in the list of time zones. As a major timezone, it is set as a favorite by default (with a star) and can be found at the top of the list, between Chicago and Los Angeles. This might have caused some confusion since it does not appear in the alphabetically sorted list that follows. We hope this clears things up!
Best regards,
--Shift Unit

### 4/5 — Almost

*2024-03-09*

Great app, if one only could select favorites for other unites besides currency only.
Please add that feature and this app will be a 5 star app.

### 5/5 — Almost the only app deserves 5 stars

*2022-01-20*

Shift unit is a tremendously useful app, mixed with neat design and all of that is free. A real 5-Star app.

### 5/5 — iPad app missing

*2021-10-20*

really great app. I am just missing it on my iPad Mini 6.

### 5/5 — Must have- Simply Awsome

*2021-08-16*

This is best conversation app available on appstore, Developer is so kind! Just keep updating it frequently and please add auto update of rates whenever we open the app!

### 5/5 — Ottima app

*2021-07-27*

Funziona bene, unica pecca se non viene digitato niente per qualche secondo si deve creare una nuova conversione per aggiungere cifre

**Developer response:** Grazie per il feedback.  Puoi disattivare questa funzione nelle impostazioni: Settings -> Number Entry Reset. In ogni caso puoi anche toccare il campo per continuare a modificare il numero.

### 5/5 — Shift Unit

*2021-01-22*

Fantastic work! Beautiful and very useful!!!

### 5/5 — Migliore convertitore AppStore!!!

*2020-10-08*

Applicazione fantastica e completa, grafica semplice ed elegante, usabilità ottima. Migliore convertitore in assoluto presente sull’App Store.

## Frequently asked questions about Shift Unit

### What units can Shift Unit convert?

Shift Unit supports over 1400 conversion units across 34 categories, including acceleration, area, currencies, length, mass, temperature, and volume. It aims for numerical precision in all conversions.

### Does Shift Unit work offline?

The app's core unit conversion functionality is available offline. However, currency conversions rely on online rates for the most up-to-date information.

### Can I use Shift Unit on my Apple Watch?

Yes, Shift Unit offers an independent Apple Watch app and complications, allowing for quick conversions directly from your wrist.

### How precise are the conversions in Shift Unit?

Shift Unit offers two precision modes: 7 significant digits in portrait mode and 14 significant digits in landscape mode for enhanced numerical accuracy.

### Does Shift Unit have ads?

No, Shift Unit is completely ad-free, providing an uninterrupted conversion experience for all users.

### How often is Shift Unit updated?

The latest version, 1.9.5, was released on July 29, 2025, indicating active development and regular updates to improve functionality and add features.

### Is Shift Unit suitable for left-handed users?

Yes, Shift Unit features customizable user interface alignment options, allowing for left or right-handed entry and two-thumb operations.

### Can I learn about units with Shift Unit?

Shift Unit integrates educational content by allowing users to pull Wikipedia page information for categories and conversion units, accessible via an info circle.

## Version history (last 5 releases)

### 1.9.7 — 2026-08-25

- Added ounces per square yard (oz/yd²) to the 2D Density category. This unit is commonly used in the US to specify fabric grammage and weight.

### 1.9.6 — 2026-05-25

- iOS 26 support has been added.
- The toolbar layout has been revised to display icons.
- The ability to open the current Clock category configuration directly into Horista has been added, provided that Horista is installed.

### 1.9.5 — 2025-07-29

- Added backward compatibility for older versions that may not handle the newly incorporated currencies (SLE, XCG, ZWG)

Thank you for using Shift Unit!

### 1.9.4 — 2025-07-29

- Added the newly adopted no-DST Chilean time zone: America/Coyhaique
  (Note: This new time zone appears at the end of the list to avoid disrupting existing favorites.)
- Added symbols for three new currencies:
   • Sierra Leonean Leone (SLE) replacing old SLL
   • Caribbean Guilder (XCG)
   • Zimbabwean ZiG (ZWG)

Thank you for using Shift Unit!

### 1.9.3 — 2025-06-07

- Added 18 pace units to the Speed category, commonly used for running/rowing/swimming: 
    1. min/mi (running pace)
    2. sec/mi (running pace)
    3. min/km (running pace)
    4. sec/km (running pace)
    5. min/1000m (running pace)
    6. sec/1000m (running pace)
    7. min/800m (running pace)
    8. min/500m  (rowing pace)
    9. sec/500m (rowing pace)
    10. min/400m (running pace)
    11. sec/400m (running pace)
    12. sec/200m (running pace)
    13. sec/100m (running pace)
    14. min/100yd (swimming pace)
    15. sec/100yd (swimming pace)
    16. sec/50m (swimming pace)
    17. sec/25m (swimming pace)
    18. sec/25yd (swimming pace)
- Displayed running/rowing/swimming icons next to the corresponding units to signify the inverse nature a pace (time/length) vs. speed (length/time)

Thank you for the user feedback!

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## More apps by Didier Burton

- [Cook Units](https://appshunter.io/ios/app/cook-units/id1587044301)
- [Horista](https://appshunter.io/ios/app/horista/id6744183365)

All apps by Didier Burton: https://appshunter.io/developer/1514037982

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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 2026-09-06.*