Metrognomicon review
A focused, offline metronome for tempo sequences and changing passages.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Metrognomicon is a free iPhone metronome for musicians practicing pieces with changing tempos. It is aimed at classical players, students, and other musicians working on accelerandos, ritardandos, or passages with multiple sections. Users can build sequences of tempo segments, set each segment by beats or elapsed time, and choose whether the sequence plays once or loops. For straightforward fixed-tempo practice, its main value is still the familiar metronome function, with tap tempo and adjustable BPM controls available alongside the sequencing tools.
The standout feature is its approach to tempo changes. A sequence can combine multiple segments, with each segment defined by a number of beats or an elapsed duration. Metrognomicon can provide a count-off before tempo changes, which supports practice where transitions need a predictable lead-in. Tempo can be entered through tapping, a slider, or an exact keypad value. Six selectable click sounds and light and dark themes add control over the practice setup without changing the app's focused purpose.
Metrognomicon also fits practice routines that need to continue without keeping the app in the foreground. It operates offline, requires no account or network connection, and continues operating when the screen locks or another app is opened. The trade-off is platform scope: the app is available only for iPhone. Musicians who want a free, self-contained tool for changing-tempo practice should find its feature set well aligned with that need. Those seeking a broader music-production tool, or access beyond iPhone, should choose a different app.
Metrognomicon pros and cons
- Where it wins
- Build tempo sequences with beat- or time-based segment lengths
- Works offline, without an account or network connection
- Continues through screen lock or while another app is open
- Where it doesn't
- Available only for iPhone
- Focused on metronome practice rather than broader music production
- Sequence controls may be more than needed for fixed-tempo practice
Metrognomicon fact sheet, pricing and score →
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