Ziggy: Learn ASL Sign Language

Analysis

Ziggy applies the language-app playbook — video lessons, gamified quizzes, review exercises, daily streaks — to American Sign Language, a language the major learning apps do not teach. It is three weeks old and built by one person.

This is the first call in the ledger selected mechanically rather than editorially: it entered the second batch by showing two consecutive positive daily growth intervals inside our 500–2,000-rating observation band, the selection rule fixed and published before this entry existed. The first batch was chosen from the operator’s area of judgment; this one was chosen by the measurement.

The growth is real and cited above. What it means is genuinely uncertain, and the strongest counter-reading is on the record: Ziggy’s chart position fell across the same days its rating count rose, which is consistent with a wave that has already crested and is now paying out its tail. If that reading is right, this call resolves MISS — the D+21 bar (2× baseline, here 1,664) needs the recent rate to hold for three weeks, and post-peak tails decay.

What would make this a HIT instead: ASL has channels that can refill a wave after charts stop showing it — classrooms, Deaf community networks, signing content on short video — and the app is growing at the top of its tracking-age cohort while the incumbents’ catalogues leave the category empty.

Either way, the resolution date is fixed and the number will be published against the bar recorded above.