* You can now switch AROW to display metric units. Tap on the gear icon within AROW to change it.
* Also improved image caching for better performance on the images tab.

Various improvements

What's new in NASA PVT+ 1.5.6
   1. Fixed a crash that could affect specific studies.
   2. Logic for several forms was enhanced to support upcoming studies.
   3. Support for iOS 18.5.
   4. Changes to language and grammar for some study forms.
   5. Multiple small bug fixes for ongoing and upcoming experiments.

What's new in NASA PVT+ 1.5.5
   1. Logic in several forms was enhanced to support upcoming studies.
   2. Support for iOS 18.3.2.
   3. Changes to language and grammar for some study forms.
   4. Multiple small bug fixes for ongoing and upcoming experiments.

- Addition of new forms and logic for custom studies.
- Enhanced support for iOS 18.2 and iPads.
- Fixed several bugs that could cause a crash in some very specific forms.
- Minor changes and bug fixes for ongoing experiments.

- Addition of new forms and logic for custom studies.
- Fixed several bugs that could cause a crash in some very specific forms.
- Enhanced support for iOS 18.0.1 and newer iPhones.
- Minor changes and bug fixes for ongoing experiments.

- Enhanced support for iOS 18 and newer iPhones.
- Addition of new forms and logic for custom studies.
- Fixed several bugs that could cause a crash in some very specific forms.
- Minor changes and bug fixes for ongoing experiments.

- Addition of new custom studies.
- Changes to some study forms for specific studies.
- Enhanced support for the latest version of iOS and iPadOS.
- Minor changes and bug fixes for ongoing studies.

- Core app enhancements to provide remote data submission capability for custom studies.
- Addition of several new study types, forms and research questionnaires for custom studies.
- Better support for studies run on iPads in landscape only orientation.
- Support of the latest versions of iOS.
- Multiple bug fixes and requested improvements.

- Support for the latest version of iOS.
- Multiple new study types, forms and research questionnaires.
- Enhanced multi-day study logic.
- Several bug fixes and requested improvements.