Features guide

Chromatic auto-detect with note, octave, cents, and Hz. Color feedback locks green near in-tune; the gauge updates smoothly with low jitter. On iPhone, temperament modes sit under the readouts for ensemble, piano, and solo practice.

• Equal (12-TET) — default. Twelve equal steps between octaves. Use when you play with piano, harp, mallets, or any fixed-pitch instrument.
• JustPro — key-relative pure intervals (5-limit). Pick a tonic (e.g. D); thirds and fifths lock to pure ratios so chords stop “beating.”
• PythagoreanPro — pure-fifth chain (3/2). Leading tones sit sharp and half steps tighten for expressive solo lines.
• Key / transposition — concert or common band & orchestra keys so the display matches your written part (separate from temperament tonic).
• Tone / drone — sustain a reference pitch (with optional fifth). Voices: Pure, Warm, Reed. Octave − / +.
• Multi-pitch tonePro — stack up to four pitches for interval and chord drones that follow your temperament.
• MM ModePro — blind practice, multi-pitch results, piano A/B, scores, journal export.
• A4 calibration — reference pitch 415–466 Hz in Settings. Tonic of Just / Pythagorean is pinned so A4 still matches your room.
• Input meter — signal strength and live dBFS (0 = digital max; normal levels are negative), plus a clear no-signal state.

Engine & range. Pitch uses the McLeod Pitch Method (MPM) — monophonic period detection. Typical range is about 40–2800 Hz (~E1–F7). Overtone scoring prefers the fundamental when a strong partial lights first. Noise-floor–relative gates and median smoothing help soft notes and decay tails.

• Strong fit — single sustained notes: brass, winds, voice, bowed strings, guitar midrange, piano midrange.
• Weaker — multiphonics, chords, percussion, extreme bass/treble, very soft distant piano, noisy rooms.
• Piano string stretch is not fully modeled; final piano temperament still needs the ear.

Professional click with intelligent meter feel, mixed-meter maps, and a loud clean Strike voice that follows system volume. Lookahead Web Audio scheduling keeps time rock-solid.

• Tempo — 30–300 BPM (felt beat or ♪ pulse, depending on count), tap tempo, − / +, presets. Double-tap the big number to reset (120 single meter; ♪ = 240 in Map).
• Time signature & count — common meters plus compound/additive feels (e.g. 6/8 In 2 / In 6, 5/8 2+3 / 3+2, 7/8 groupings). BPM converts so pulse speed stays true when you change count.
• Map (mixed meter)Pro — loop bars with different time signatures on a shared eighth-note pulse (♪). Sample loop, up to 16 bars, per-bar repeats (×1–×8), save up to 3 named maps, bar strip and quick-load chips while Map is on.
• Export click track — from the Map sheet: WAV for GarageBand / live / band practice (Strike samples, grouping accents), MIDI for DAWs, and a re-importable map file (.centsmap.json). Loops, count-in, and Share pack for AirDrop / Files — no DAW required for a stage click.
• Subdivision — labels match the meter (x/4: Beat · 8ths · Triplets · 16ths; x/8: 8ths · 16ths · Triplets · 32nds).
• Accents — tap pads to weight beats; stronger on group heads and map accents.
• Across tabs — start the click, then use Tuner, Record, or Journal; status chip stays available.
• Practice timer — global session timer from every tab.

Practice recordings stay on this device. Clear capture modes, library tools, and a floating player that doesn’t fight your scroll.

• Record — manual start/stop with level meter and waveform while capturing.
• Auto-record — hands-free: listens for you, records the phrase, stops after silence. Distinct from Autoplay.
• Autoplay — after a recording saves, plays it back for review (works after manual or auto capture). Optional; leave off for silent capture only.
• Library — star recordings, All / ★ filter, swipe left to delete (hint stays pinned under the list), bulk select for export/delete, A/B compare (chip + guided pick 2).
• Focus player — mid-screen glass card with soft dim: play/pause, scrub, −5s, share, and A|B switch when comparing. Stays until you dismiss so you can re-listen.
• Metronome + record — run the click or drone while recording; screen stays awake during Auto-record.
• Quality — AAC/MP4 when supported for best mobile quality and sharing.

Lean practice journal with streak, week dots, and a full-screen editor — compact chrome so the list stays primary.

• Streak & week — compact streak hero, seven day dots, collapsible “This week” with days / minutes / recordings and a weekly day goal (Off · 3–7d).
• Search & filter — search beside All / ★ on one row.
• Entries — title, rich text (bold, lists, headings), mood, minutes, linked recording, photo, voice memo, location. Prompts and draft autosave for new entries.
• Star & share — favorites and system share when available (desktop and mobile).
• Delete — swipe left or delete from the editor. Linked recordings stay in Record.

Theory and ear training for grades 6–12. Skills match contest types with original drills. Progress stays on the device — no account. Free samples include Intervals, Pitch Match, Key Signatures, Scales, Rhythm, Tap, Note reading, and Skill mix.

• Grade bands — 6–8 · 9–10 · 11–12 change difficulty and the recommended path.
• Path — ordered units in stages (see → rhythm → meter → harmony → produce); mastery at 80% best (green check). Continue is the main button; stage rail shows where you are; share is a quiet icon; reset under the checklist (type RESET).
• Full HYKOM pathPro — dictation, write drills, harmony, and the complete unit map beyond free samples.
• Ear — intervals, scales, chords, meter, pitch match, melodic dictation.
• Rhythm — name a pattern or tap it back.
• Theory — note reading, triads on staff, keys, scales, terms, transposition.
• Guide — paths and classroom tips.

Move to a new phone or browser without losing your library.

• Export all — settings (including maps), journal, and recordings.
• Import — restore elsewhere; store the file in iCloud Drive, Files, or Google Drive yourself.
• Map click tracks — export WAV / MIDI / map file from Metronome without a full backup (see Sharing).
• Reminders — occasional toast to export after you’ve been practicing.

• Share practice cents — app link from Settings.
• Share HYKOM progress — one text line (mastered units / %) for parents or teachers.
• Share a recording — system sheet for audio files; also from the focus player.
• Share a journal entry — text plus media when supported.
• Share a click track — WAV / MIDI / map pack from Metronome → Map → Export (GarageBand, DAW, or bandmates).
• Add to Home Screen — install guide in Settings (iOS & Android).

Microphone audio is processed on your device. We do not upload your recordings or journal.

• Optional analytics (page views) may run if configured; practice media stays local.
• Export is under your control — you choose where the backup goes.
• Location — only if you tap GPS on a journal entry; never background tracking.
• Clearing site data removes local data — export first if you care about it.