instal the last version for iphoneQalculate! 4.8.1 Rev 2

It seems like you're looking for assistance with installing the last version of Qalculate! on your iPhone, as well as some general iOS-related questions.

Regarding the installation of Qalculate!, I can help you with that. You mentioned the app's name and version number ('instal the last version for iphoneQalculate! 4.8.1 Rev 2'). To download and install the app:

1. Open the App Store on your iPhone.

2. Tap the 'Search' tab at the bottom of the screen.

3. Type 'Qalculate' in the search bar and select the Qalculate! app from the results.

4. Tap the 'Get' button next to the app's icon.

5. Wait for the app to download and install on your device.

Once installed, you can open Qalculate! by tapping its icon on your iPhone's home screen.

As for your general iOS questions:

* To download SkillCat: HVAC, Electrical+, follow the same steps as above (search for the app in the App Store, tap 'Get,' and wait for it to install).

* For information about iOS 15 features, you can visit Apple's official website or consult online resources. The features mentioned are spatial audio and Portrait mode for FaceTime, Shared with You for resurfacing shared content from Messages conversations, and Focus for filtering out notifications.

Regarding your concern about uninstalling Apple Application Support (圆4), it's essential to note that this is a critical component of iOS, and removing it may cause system instability or issues. If you're experiencing problems after uninstalling the app support, I recommend reinstalling it or seeking assistance from an authorized Apple representative.

Lastly, regarding the updates for Salient VC and WP 4.8.1 compatibility, these seem to be software-related updates. It's crucial to keep your device and installed apps up-to-date to ensure optimal performance and security.

Please let me know if you have any further questions or concerns!

Instal the last version for iphoneQalculate! 4.8.1 Rev 2