ModusPractica Pro is an intelligent practice planner for musicians. Instead of repeating passages until they feel right, the app tells you exactly what to practice and when — based on how your brain actually consolidates motor skills.
Click the + button in the sidebar next to "My Repertoire". Enter the title and optionally the composer name.
Select your piece, then click + Add Section. A section is any fragment of music you want to practice in isolation — it can be as small as half a bar or as large as you find manageable. There are no rules about size: let your own experience and the difficulty of the passage guide you. Give it a name — this can be anything that helps you identify it: bar numbers, letter names, descriptive text, or any combination (e.g. "bars 1–4", "A-section", "maat 3 slag 3–4", "left hand only intro"). Then set a starting BPM and a target BPM.
Sections that are due appear under Due Today on the dashboard. Click Practice to open the session page.
A piece is a complete work (e.g. Elegy by Reinecke). A section is any fragment of that piece that you choose to practice in isolation. You decide entirely how to divide your pieces — there is no prescribed number of sections or minimum size. Some musicians work with two or three large sections per piece; others divide every difficult bar into its own section.
Every section moves through three stages. Exploration means you are in the first two days of learning — the material is new and fragile. Consolidation means the section is in the spaced repetition cycle — the app spaces your practice to build long-term retention. Mastery means the section is fully consolidated into long-term memory.
A number that represents how many days your memory of this section will last. A stability of 5 means the app will schedule the next practice in approximately 5 days. The better you perform, the faster stability grows.
A score from 0 to 1 that reflects how hard this section is for you personally. It adjusts automatically based on your performance. A high difficulty slows down stability growth.
You set a target tempo for each section. The app gradually increases your practice tempo as your performance improves — you never need to adjust the metronome manually.
The app calculates the optimal moment for each repetition. Sections appear under Due Today when their scheduled date has arrived. Practicing earlier or later than scheduled reduces the efficiency of the spacing.
The stability and difficulty values are mathematical approximations — a model of how motor memory behaves, not a direct measurement of what happens in your brain. No algorithm can measure the exact state of a synapse. The underlying principles — spaced repetition, rest, correct execution — are well supported by motor learning research. The specific numbers the app calculates are a structured, evidence-informed estimate. They are useful precisely because they are consistent and honest about what they are.
This is why your own honest self-assessment remains the most important input the app receives. The model is only as good as the data you give it.
A training session registers correct and failed attempts and updates the scheduling algorithm. An analysis session (🔍) is for free, untracked exploration — use it to discover fingerings, decide how to divide a piece into sections, explore phrasing, or simply read through new material without any performance pressure. It is the natural starting point before you begin structured training on a new passage.
When learning a new passage on a keyboard instrument, it is tempting to combine both hands as quickly as possible. Research on motor learning shows this is counterproductive: bimanual coordination is a cognitively and motorically distinct task from single-hand execution, and it requires its own acquisition phase before it can consolidate effectively (Bangert et al., 2006; Watanabe et al., 2002).
The recommended workflow in ModusPractica Pro is the following.
First, register the right hand and left hand as separate sections and use the training counter for both. Each hand executes a single, well-defined motor sequence that can be repeated correctly and counted accurately. The algorithm receives meaningful input and schedules each hand independently according to its own stability and difficulty.
Once both hands are stable individually, begin combining them. At this stage — and for as long as correct full repetitions cannot be reliably executed — use the Analysis mode (🔍) rather than the training counter. The counter should only register attempts that you can genuinely judge as correct or failed. If you are working through one bar at a time with both hands and the counter would remain at zero, that is a clear signal that you are still in the exploration phase, not the training phase. Saving a session with zero correct repetitions gives the algorithm incorrect input and produces an unreliable schedule.
When both hands together feel stable enough to produce correct, controlled repetitions, create a new section — for example "Bars 1–4 both hands" — and start the training counter from that point. This section will then follow its own independent spaced repetition schedule.
The timer measures the total duration of your session for statistical purposes only. It has no effect on your score or scheduling. There is deliberately no time pressure anywhere in this app. Practicing under time pressure raises cortisol levels and disrupts the motor consolidation processes that make practice effective. Take all the time you need between repetitions. Slow, conscious, and correct is always more valuable than fast and approximate.
Use the + and − buttons to register correct repetitions and failed attempts. A failed attempt is any execution you judge as incorrect. A correct repetition is a clean, controlled execution at the current tempo. When beginning a new section, always start at a very slow tempo — well below what feels necessary. Motor memory is built through correct repetition, not through speed. A single slow, perfectly controlled execution does more for long-term retention than ten rushed approximations. Speed follows naturally once the motor pattern is consolidated.
If you accumulate too many failed attempts, the app stops the session automatically. This is not a punishment — frustrated practice encodes errors into muscle memory. The section is rescheduled for the next day so you return to it after a night of sleep-based consolidation. If the section keeps triggering FrustrationGuard, consider archiving it and dividing it into smaller sections. A passage that is too large or too fast to execute correctly is not ready for training — it needs to be broken down further.
Set your energy level before practicing. A low energy level reduces the penalty for failed attempts — the app recognises that fatigue is physiological, not a reflection of your motor skill.
The number of failed attempts before your first correct repetition. A decreasing entry cost across sessions is one of the clearest signs that a motor skill is genuinely consolidating in long-term memory.
Use the notes field to record observations — fingering decisions, problem spots, tempo remarks. The most recent note is shown at the top of the next session.
Click Complete Session when you are done. You will be asked to confirm the outcome and to rate your personal feeling about the session: Poor, Fair, Good, or Excellent. This self-assessment is not cosmetic — it feeds directly into the scheduling algorithm. Your subjective experience of a session often captures information that the raw numbers do not: tension, hesitation, lack of focus, or conversely a feeling of real flow. The algorithm combines both objective performance data and your personal rating to calculate the optimal next practice date.
The app schedules one training session per section per calendar day. If you wish to practice the same section again later that day, you are free to do so — the session will be recorded in your statistics. The scheduling algorithm will not update a second time on the same day: your next practice date remains the one calculated after the first session.
The dashboard is your daily starting point. Due Today shows all sections scheduled for today. Click a section to go directly to the practice session.
The sections in Due Today are ordered by priority: the most overdue section appears first, followed by sections due today. Within the same due date, sections with lower stability — those most at risk of being forgotten — are listed before more stable ones. This ordering is automatic and reflects the algorithm's assessment of what needs your attention most urgently. You do not need to reorder the list manually.
Your repertoire is listed in the sidebar. Click a piece to see its sections and their current status. Use the sort menu to order by due date, title, last practiced, or recently added.
Sections and pieces can be archived when no longer actively studied. Archived items are hidden from Due Today but their full practice history is preserved and remains visible in Statistics. Archived sections can also be permanently deleted — this removes the section itself but retains all recorded session data, so your practice time and history are never lost even when you clean up your repertoire.
The streak counter at the bottom of the sidebar shows your current consecutive practice days and your personal record.
The Schedule page shows a calendar view of all upcoming practice sessions. Use the week selector to look 1, 2, 4 or 8 weeks ahead. Each day shows which sections are due. This helps you plan practice time and spot overloaded days in advance.
A bar chart of daily practice time, colour-coded by training and analysis.
Shows how many active sections are in each stability bracket — a quick overview of where your repertoire stands in the learning curve.
A breakdown of total time, session count and average session length per piece.
You can print or save a static practice report at any time without an AI key. This report displays your raw statistical data — sessions, practice time, stability and performance — in a clean printable format that you can analyse yourself or share with a teacher. Use the 🖨️ Print Report button in the Statistics page to generate it.
The AI Progress Report analyses your complete practice database and generates a written report covering consistency, tempo trends, sections that need attention, and three concrete action points. The AI does not replace the statistics — it reads and interprets them, providing context and advice that the numbers alone cannot give.
The report requires a personal Groq API key, configured in Settings. Groq was chosen specifically because it uses a pay-per-use model — you only pay for what you actually use, and the cost per report is extremely small (typically a fraction of a cent). You can monitor your exact usage and costs at any time on the Groq console (console.groq.com) .
The AI feature is entirely optional. ModusPractica Pro is fully functional without it — the report is a valuable addition for users who want a deeper interpretation of their data, but it is never required for normal use.
gsk_) and paste
it into the Groq API Key field in
ModusPractica Pro Settings. Your key is stored
only in your browser's session memory and is
automatically cleared when you close the
browser — it is never sent to any server other
than Groq's own API.
Export all your data as a JSON file at any time. This file can be reimported to restore your data or transfer it to another device.
If you have a ModusPractica Lite backup, you can import it here. Your pieces and sections are reconstructed automatically. Note that Lite sessions do not contain individual attempt counts — these fields will be set to zero after migration.
Enter your personal Groq API key to enable the AI Progress Report in Statistics. Groq uses a pay-per-use pricing model — the cost per report is extremely small and you only pay for what you use. Monitor your usage at console.groq.com . Your key is stored in session memory only and is cleared automatically when you close the browser. It is never stored permanently or transmitted to any server other than Groq.
Permanently deletes all data. Always export a backup before using this option.
ModusPractica Pro stores all data locally in your browser using IndexedDB. There is no cloud server, no account, and no synchronisation. This is a deliberate choice that keeps your data private and under your full control — but it comes with one important consequence: your data lives in the browser you use.
Choose one browser and use it consistently for all your practice sessions. If you switch to a different browser on the same machine, or move to a different device, your data will not be there — unless you explicitly transfer it via an export file.
To move your data to another browser or device: export a backup in Settings, then open ModusPractica Pro in the new browser or device and import that file. Once you have verified the import, use Danger Zone → Reset App on the old browser to remove the duplicate.
You can store your exported backup file in your own cloud storage (Google Drive, iCloud, Dropbox, or any service you trust) so that it is accessible from anywhere. This gives you the flexibility of working across machines while keeping full control of your data.
ModusPractica Pro is well suited for use in a teaching context. Here are some practical guidelines.
Smaller sections allow more precise tracking and more targeted repetition. Do not feel constrained by bar boundaries — a difficult section can be as short as half a bar or even a single beat. The more focused the section, the more efficiently the app can schedule and track it. You can always expand or re-divide sections as your playing develops.
The target BPM should be the final performance tempo, not a practice tempo. The app manages the gradual build-up automatically.
Keep the gap between start and target BPM manageable. A starting tempo of 30 BPM with a target of 100 BPM creates a gap that the algorithm will bridge gradually, but the intermediate steps may feel disconnected from musical reality. A practical rule: if the gap exceeds 40 BPM, consider setting an intermediate target first — for example 60 BPM — and raising it once that tempo is consolidated. The app does not enforce this; it is a pedagogical decision that remains with the user.
Before the first training session on a new section, use the Analysis (🔍) mode to explore the passage freely. This gives the student a mental map before the counting begins.
Students who are not guided on this point will instinctively try to combine both hands too early. Make the workflow explicit from the first lesson: right hand and left hand are registered as separate sections and trained independently until both are stable. Only then does the student switch to Analysis mode for the combined version, and only when full repetitions are reliably correct does a new "both hands" section get created. This structure prevents the common error of saving sessions with zero correct repetitions, which corrupts the scheduling data.
Students who understand why the app schedules repetitions the way it does are more likely to trust the system and follow it consistently.
When the guard triggers, do not override it. Use the remaining lesson time for analysis or work on a different piece. Return to the section in the next lesson.
The Statistics page is a useful tool for lesson conversations — success rate, entry cost trends and stability distribution give objective data to discuss progress.
The following tips are grounded in motor learning research and complement the algorithm. They are practical suggestions, not requirements — the app works without them. But applied consistently, they can meaningfully improve the quality of each session.
Research suggests that brief pauses between repetitions support motor memory consolidation. A landmark study found that performance improvements during motor skill learning develop almost exclusively during short rest periods between practice bouts — not during the practice itself. During these pauses, the brain appears to replay recently practised movement sequences, a process linked to the strengthening of motor memory traces (Bönstrup et al., 2019, Current Biology).
In practice: after completing a repetition, pause briefly, release any physical tension, and allow a few seconds of stillness before attempting the next one. Resist the urge to immediately analyse what went wrong — passive rest appears more beneficial than active cognitive processing during these micro-intervals.
Sleep is not merely rest — it is an active consolidation process for motor memory traces. Research using piano-type finger sequences has shown that subcortical brain regions involved in motor learning strengthen their mutual connections during sleep, producing measurable improvements in accuracy and timing the following morning — without any additional practice (Walker et al., 2002, Neuron; Debas et al., 2014, NeuroImage).
Two practical consequences follow. First: a section that still feels rough at the end of a session may feel noticeably cleaner the next morning — this is not coincidence but biology. Second: practicing shortly before going to sleep is particularly efficient, because consolidation begins immediately during the first sleep cycle.
This is also why ModusPractica never schedules a section twice on the same calendar day. The algorithm treats one night of sleep as the minimum unit of consolidation — a design choice directly grounded in the research above. You are always free to practice a section a second time on the same day on your own initiative. The additional session will be recorded in your statistics, but the scheduling algorithm will not be updated a second time: the next practice date calculated after your first session of the day remains unchanged.