The part almost everyone reads
Above the Fold
The App Store hides your description behind a “more” link, and almost nobody taps it. Whatever sits above that cut is, in practice, the whole description — so this shows you exactly where it lands.
0/4000 characters
Why only the opening matters
A description can run to 4,000 characters, and the product page shows a few lines of it. Everything after that is behind a tap most readers never make, which makes the first two sentences roughly the entire listing as far as conversion is concerned. Load an app above, or paste a draft.