While the Nestle-Aland Novum Testamentum Graece is designed for scholarly research, the Greek New Testament, 4th Revised Edition is designed for translators and students.
Like NA27, this is the leading edition of the original text of the New Testament. It contains the same Greek text as NA27, differing only in some details of punctuation and paragraphing. The Accordance version is fully tagged morphologically allowing for grammatical and lemma searches.
The critical apparatus includes exegetically significant variants (fewer than NA27) but adds extensive manuscript evidence (more than NA27) for each variant, thereby offering in-depth instruction for students on how variants and the evidence for them work together.
The UBS4-T with apparatus is available for Easy Install on Mac and iOS for $89.99, but since the text and tagging are virtually identical to the GNT-T and NA27-T, the UBS4-T with apparatus can be added to either of those texts for only $39.99.