General Adjectives:
* Applicable: This is the most direct adjective, meaning "relevant or suitable to a particular situation."
* Applied: This describes something that is being used or put into practice.
* Practical: This emphasizes the usefulness and real-world application of something.
* Diligent: This describes someone who is hardworking and committed to their application.
* Assiduous: Similar to diligent, emphasizing carefulness and persistence in application.
Specific to Technology/Software:
* Software: This describes an application that is a computer program.
* Mobile: This describes an application designed for use on a mobile device.
* Web-based: This describes an application that is accessed through a web browser.
* Cloud-based: This describes an application that is hosted and accessed online.
Specific to Other Contexts:
* Dedicated: This describes someone who is wholly devoted to their application.
* Earnest: This describes someone who is serious and sincere in their application.
* Effective: This describes an application that achieves its desired outcome.
The best adjective to use will depend on the specific context and meaning you want to convey.