H Ison for iOS: Limited-Time App Store Discount

H Ison for iOS is currently available at a limited-time discount, dropping from $22.99 to $19.99 — a modest $3 saving. This professional Byzantine ison app is tailored for psaltes, choir directors, and students of Byzantine music. It provides eight Byzantine notes (Δη, Κε, Ζω, Νη, Πα, Βου, Γα, Δη), a modulator for microtones, and a double ison mode for richer harmonies. The silent metronome and built-in audio recording are practical tools for practice and rehearsal. The PRO version adds cathedral reverb and a vocal tuner, though these are not included in the base price. While the discount is relatively small, H Ison fills a niche that few general productivity or music apps address. Most choir or tuning apps lack authentic Byzantine scales and microtonal support. For dedicated Byzantine chanters or choirs, this app offers specialized features that justify its cost, especially compared to generic pitch pipes or tuners. However, casual musicians may find the functionality too niche. If you regularly practice or teach Byzantine chant, the current price is reasonable — though you might wait for a deeper sale if you only need occasional use.