The spelling of the word "APP CT" is straightforward when using the International Phonetic Alphabet (IPA) phonetic transcription. IPA symbols represent the sounds of speech, and in "APP CT," the first sound is "æ," which is the vowel sound in "cat." The second sound is "p," which represents the voiceless bilabial plosive. The third sound is "k," which is the voiceless velar plosive. Lastly, "t" represents the voiceless alveolar plosive. Thus, "APP CT" is spelled as /æpkət/.