About 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...
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!
Previous Versions
Here you can find the changelog of Shift Unit since it was posted on our website on 2021-12-17 14:14:25.
The latest version is 1.9.6 and it was updated on 2026-06-27 12:10:04. See below the changes in each version.
Shift Unit version 1.9.6
Updated At: 2026-06-09
Changes: Version History - 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. 1.9.6 May 25 - Added backward compatibility for older versions that may not handle the newly incorporated currencies (SLE, XCG, ZWG)
Thank you for using Shift Unit! 1.9.5 07/29/2025 - 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! 1.9.4 07/29/2025 - 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! 1.9.3 06/07/2025 iOS:
- Reduced delay between Weather data updates to 1 hour (in the Clock category) for a better user experience. 1.9.2 01/10/2025 iOS Fixes:
- Fixed an issue where switching to the Clock category could sometimes crash the app.
- Restored category highlight animation upon selecting another category in the main screen.
- Optimized external service handling. 1.9.1 12/30/2024 - Dropped support for iOS 14 and 15 to leverage advanced user interface components available from iOS 16 onward. (Analytics showed that all active users over the past year were on iOS 17+.)
- Introduced Apple Weather service for current weather conditions and 10-day forecast across regions in the Clock category.
Thank you for using Shift Unit! 1.9.0 12/27/2024 - Switched to "Weather API" service for weather conditions and forecast--as the OpenWeather service v2.5 becomes deprecated after Oct 7th, 2024.
- Updated typography and layout of help screens
- Adjusted some user interface elements that were out of alignment
- Updated some labels for better reading 1.8.4 10/06/2024 watchOS 10:
- Now currency rates are automatically updated in the conversion screen when app comes to the foreground and when conversion screen is swiped to (in addition to the already automatic update when the History screen is displayed.)
Thank you for using Shift Unit! 1.8.3 02/20/2024 iOS:
- Now using Google Analytics for anonymous usage data if the user has opted in 1.8.2 02/15/2024 watchOS 10 fix:
- Adjusted the tappable area around the preferred categories list in the category/units selection screen 1.8.1 11/15/2023 watchOS 10 update:
- Re-designed app navigation and screens to follow the new watchOS 10 guidelines, in particular, vertical tab pagination, screen background, and toolbar items.
- You can now use the crown (or up/down swipes) to navigate through Main screen, Settings, and History. Choosing conversion categories and units is now accessed via tapping the current category icon in the Main/Settings tabs.
- Created brand new widget for watchOS 10 Smart Stack and Complications. The widget displays the info from the most recent History item. You can pin the Widget in the Smart Stack if quick access is needed.
- The keypad now features a Clear (C) button.
- Tapping an item in the History list now brings that item to the top of the History (as most recent,) and also reloads the Widget & Complications.
Thank you for using Shift Unit! 1.8.0 11/13/2023 FIXED (watchOS)
- Corrected some horizontal pagination screen issue on Watch Ultra
Thank you for the feedback, and for using Shift Unit! 1.7.1 06/23/2023 FIXED (iOS)
- The Map view in the Clock category now follows the device’s bottom rounded corners on iPhone 14 Pro and iPhone 14 Pro Max
- Updated the usage data reporting system
Thank you for the feedback, and for using Shift Unit! 1.7.0 06/19/2023 iOS
- Now the light/dark mode for the app only comes from the device setting and cannot be set manually anymore, in order to fix an issue where the app needed to be restarted in order to follow the device setting. 1.6.9 06/11/2023 - Added Japanese Cup in Volume category
- Added g/jc (gram per Japanese Cup) and g/合 (Gram per Sake Cup) in Density 3D category
Thank you for using Shift Unit! 1.6.8 01/15/2023 - Minor user interface fixes for iOS 16.1
Thank you for using Shift Unit! 1.6.7 10/31/2022 FIXED:
- Unit wheel pickers/selectors now work properly in iOS 16.1 1.6.6 10/30/2022 FIXED:
- Fixed interactions when choosing symbol alignments/positions in Settings -> Unit Selectors
- Various visual adjustments for iOS 16 1.6.5 10/11/2022 FIXED:
- There was a conversion mishandling involving unit dBm (Decibel-milliwatt) in the Power category. The correct (non-linear) conversions are now in place.
NEW:
- Added the following Power units: Attowatt (aW), Femtowatt (fW), Picowatt (pW), Nanowatt (nW), Microwatt (μW), Megawatt (MW), Gigawatt (GW), Terawatt (TW), and Petawatt (PW)
Thank you for the feedback, and for using Shift Unit! 1.6.4 09/10/2022 iOS:
- Now currency rates get automatically refreshed upon opening the app or bringing the app from the background, if Currency was the selected unit category
- Made currency data handling more robust against currency service changes
Thank you for using Shift Unit! 1.6.3 09/09/2022 FIXED: iOS and WatchOS
- Fixed crash issue with the Currency category, and currency rate updates.
Note: MRO (Mauritanian Ouguiya prior to 2018) is not available any more.
Thank you for using Shift Unit! 1.6.2 01/04/2022 FIXED:
- iOS 15: Fixed list style for Category and Region lists
Thank you for using Shift Unit! 1.6.1 11/09/2021 NEW:
* iOS: support for iOS 15
* WatchOS: support for watchOS 8
* Added navigation item to open/install Cook Units app
FIXED:
* iOS: Fixed issue where selected timezones (in Clock Category) were not restored properly on the right side 1.6.0 10/20/2021 NEW in iOS + watchOS:
* Added Metric Cup (mc), Hint (hint), Drop (dr), Smidgen (smdg), Pinch (pn), Dash (ds), Saltspoon (sap), Barspoon (bsp), Dessertspoon (dsp), Wineglass (wgf), and Teacup (tcf) in Volume category
* Added Gram per Metric Cup (g/mc) and Ounce per Cup (oz/c) to Volumetric Density category
NEW in iOS:
* Switching categories now recalls the last input number handled for that category (similar to watchOS.)
Thank you for all the feedback!
Happy conversions :) 1.5.4 09/20/2021
Shift Unit version 1.9.5
Updated At: 2025-07-29
Changes: Jul 29, 2025
Version 1.9.5
- Added backward compatibility for older versions that may not handle the newly incorporated currencies (SLE, XCG, ZWG)
Thank you for using Shift Unit!
Shift Unit version 1.9.5
Updated At: 2025-07-29
Changes: - Added backward compatibility for older versions that may not handle the newly incorporated currencies (SLE, XCG, ZWG)
Thank you for using Shift Unit!
Shift Unit version 1.9.2
Updated At: 2025-01-10
Changes: Jan 10, 2025
Version 1.9.2
iOS:
- Reduced delay between Weather data updates to 1 hour (in the Clock category) for a better user experience.
Shift Unit version 1.9.1
Updated At: 2024-12-30
Changes: Dec 30, 2024
Version 1.9.1
iOS Fixes:
- Fixed an issue where switching to the Clock category could sometimes crash the app.
- Restored category highlight animation upon selecting another category in the main screen.
- Optimized external service handling.
Shift Unit version 1.8.4
Updated At: 2024-10-06
Changes: Oct 6, 2024
Version 1.8.4
- Switched to "Weather API" service for weather conditions and forecast--as the OpenWeather service v2.5 becomes deprecated after Oct 7th, 2024.
- Updated typography and layout of help screens
- Adjusted some user interface elements that were out of alignment
- Updated some labels for better reading
Shift Unit version 1.8.3
Updated At: 2024-02-20
Changes: Feb 20, 2024
Version 1.8.3
watchOS 10:
- Now currency rates are automatically updated in the conversion screen when app comes to the foreground and when conversion screen is swiped to (in addition to the already automatic update when the History screen is displayed.)
Thank you for using Shift Unit!
Shift Unit version 1.8.1
Updated At: 2023-11-15
Changes: Nov 15, 2023
Version 1.8.1
watchOS 10 fix:
- Adjusted the tappable area around the preferred categories list in the category/units selection screen
Shift Unit version 1.7.1
Updated At: 2023-06-23
Changes: Jun 23, 2023
Version 1.7.1
FIXED (watchOS)
- Corrected some horizontal pagination screen issue on Watch Ultra
Thank you for the feedback, and for using Shift Unit!
Shift Unit version 1.7.0
Updated At: 2023-06-19
Changes: Jun 19, 2023
Version 1.7.0
FIXED (iOS)
- The Map view in the Clock category now follows the device’s bottom rounded corners on iPhone 14 Pro and iPhone 14 Pro Max
- Updated the usage data reporting system
Thank you for the feedback, and for using Shift Unit!
Disclaimer
Official App Store Link
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