13 sensors. 208 readings per second. The Vahini Handwriting Assistant captures pressure, speed, stability, and in-air movement. Invisible signals that reveal how your child's brain is learning to write.
Sensor channels
Hz
Sampling rate
%
Kids with writing issues
#584433
Patent number
Our Notebook Scan evaluates the finished writing. The Handwriting Assistant captures how the writing happens. Two complementary views.
Start with a free scan today. Add the pen for deeper insights when it launches.
The pen captures what no camera can see: the physics of how your child forms each letter.
Measures grip force and pen-to-paper pressure. Excessive pressure signals tension; too little means poor control.
Research: Children with dysgraphia apply 2.5x more pressure than peers
Tracks velocity patterns across strokes. Rushed writing and inconsistent pacing reveal automaticity gaps.
Research: Fluent writers maintain consistent speed across a full page
Gyroscope detects micro-tremors and wrist rotation. High variability indicates underdeveloped motor control.
Research: Stability improves 40% with targeted exercises over 8 weeks
Jerk analysis (rate of acceleration change) measures coordination. Jerky strokes mean the brain is still 'thinking' about each movement.
Research: Smooth strokes indicate writing has become automatic
Tracks pen trajectory between strokes, the invisible path above paper. Hesitation patterns reveal letter planning difficulties.
Research: In-air time is 40% of total writing time for struggling writers
Combines all signals to assess whether letter formation is stored in muscle memory or requires conscious effort each time.
Research: Automaticity frees cognitive load for spelling and composition
The pen looks and writes like a regular pen. The intelligence is invisible.
Looks like a normal pen. Uses a standard refill. Writes on any paper. No special setup.
13 sensors capture data at 208Hz. Pressure, angle, speed, tremor, all invisible to the child.
Bluetooth Low Energy sends sensor data to a phone or tablet in real time. No wires, no interruption.
Our ML model analyzes motor patterns and produces a detailed assessment: pressure profile, stability score, fluency rating.
Indian Patent Granted
#584433
Application #202541020024. Granted March 2026. Valid 20 years. Covers the IMU-based handwriting analysis sensor array and method.
Research shows handwriting activates brain regions that typing doesn't. Early detection of motor issues can change a child's entire academic trajectory.
34%
of Indian school children have handwriting difficulties
Indian Journal of Occupational Therapy
0
India-specific handwriting screening tools exist today
Gap in Indian edtech market
85%
of classroom time involves handwriting in primary school
Educational research consensus
40%
improvement in stability with 8 weeks of targeted exercises
Motor skills intervention studies
$9.48B
projected digital pen market size by 2033
Market research reports
2.5x
more pressure applied by children with dysgraphia
Rosenblum et al. research
Our Notebook Scan is available right now, try it free. When the Handwriting Assistant launches, you'll get the complete picture: what the writing looks like AND how it was produced.
Be first to know when the pen launches. Early access pricing for waitlist members. Your feedback shapes the product.