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PhysDraft

Try PhysDraft

Upload a problem image.
Get a simulation automatically.

Mechanics problems only · Open beta
Anyone can start with a free trial (first 10 problems).

Watch the introductionEnglish 1:14

Explore the simulations

These simulations were automatically created from problem images. Press play to explore.

Mechanics / 2 examples

How PhysDraft works

Upload an image and AI reads the problem and diagram.
Together with our custom-built physics engine, it automatically creates a working simulation.

How to use it

  1. Example input: a cart and a weight connected by a string over a pulley
    01

    Upload a problem

    Choose an image with the problem and diagram.

    Example: Osaka Institute of Technology, 2019 ↗

  2. Reviewing the reconstructed cart, pulley, string and weight
    02

    Automatically generated

    The objects and their connections are recognized and their motion is recreated.

    A diagram automatically created from the image

  3. The cart and weight in new positions after playback
    03

    Play the motion

    Press play and watch how the motion unfolds.

    The simulation in motion

Mechanics problems only for now. Electromagnetism, thermodynamics, waves, atomic physics and other topics are not supported yet.
This is a beta version; recognition and simulated motion may contain errors.

Open beta

Pricing

Open beta pricing. All prices include tax.

Free trial
¥0

Your first 10 problems

Standard
¥980/ month

7 problems a week

Plus
¥2,980/ month

23 problems a week

Replaying a simulation you created is unlimited.

One use means creating a simulation for one problem.

PhysDraft is now in open beta. Anyone can start with the free trial. Paid plans are coming soon.

Standard and Plus uses are granted every Monday at 0:00 JST. Unused uses do not carry over.

Plans for teaching and lesson preparation

Teacher
¥2,980/ month
  • 50 problems a month
  • 1 teacher
  • 1 classroom
Classroom
¥9,800/ month
  • 200 problems a month, shared
  • Up to 3 teachers
  • 1 classroom
Multiple classrooms
¥24,800/ month
  • 600 problems a month, shared
  • Up to 10 teachers
  • Up to 3 classrooms

Student plans start at ¥980 a month. School plans are priced by the number of teachers and classrooms.

For showing simulations in class. Students creating their own simulations need a separate plan.

Free trial for schools
First 30 problems¥0
  • Try it with the problems you use in class.
  • It never switches to a paid plan automatically.
  • You sign up for a paid plan only if you want to continue.

Once per organization. Up to 30 problems in total.

Contact us by emailphysdraft@gmail.com

Prices of related learning tools

Our school pricing takes these price ranges into account.

ServicePrice
StudySapuriLectures and exercises for individuals¥2,178 / month
Studyaid D.B. PhysicsProblem database and worksheet creation¥46,200 / 7 years
LabsterVirtual labs for institutionsFrom US$5,000 / year

For reference only; use cases and contract units differ. Yen prices include tax. Checked on October 21, 2026.

Studyaid is one license for general and corporate use. Labster's figure is a starting guide; quotes are individual.

Physics is
fascinating

We want more people to feel that spark.
We are using technology to change how physics is learned.

About us

About us

We are two students
building new ways to fall in love with physics.

芦澤 知樹

Research & web development

Interned in the Goda Laboratory at the University of Tokyo and under venture capitalist Yasuhiro Yoshizawa. After graduating from Azabu High School, he went on to college in the US and now develops websites and apps. His service YUNAMATCH has reached around 2,000 users and 140,000 cumulative page views.

X @appmakes18

Research

Research intern in the Goda Laboratory at the University of Tokyo from April to September 2026, investigating particle detection using surface-enhanced Raman spectroscopy (SERS) under Yasutaka Kitahama.

Used SERS and a portable 785 nm Raman spectrometer to detect polystyrene particles on gold substrates. Designed comparative experiments varying concentration, particle size and deposited layers, and analyzed their spectra. The concentration model achieved R² = 0.993 and the particle-size model R² = 0.997.

Presented “Detecting Microplastics: Polystyrene Particles on a Gold Substrate” at the University of Tokyo's Intern Talks on September 2, 2026.

Interests include experimental condensed matter physics, quantum materials and superconductivity, scanning magnetic microscopy, and optical spectroscopy.

YUNAMATCH

Built and launched a Pokémon UNITE teammate-finding service in three days. It reached around 2,000 registered users and 140,000 cumulative page views (self-reported at the time of publication).

Visit YUNAMATCH ↗

Venture capital internship

Interned under venture capitalist Yasuhiro Yoshizawa.

飯塚 忠相

Keio University · Faculty of Policy Management

Built TANE, a digital map for school festivals, and received the Director-General's Award from METI's Commerce and Information Policy Bureau at the U-22 Programming Contest 2024. Builds services that solve everyday problems.

X @tada0100

Background

Childhood
Lived in Mexico.
2020.04
Started programming upon entering junior high school.
2023–2024
Developed and operated TANE Project for a high school festival, replacing paper guides with a digital map. In 2024, 558 people used it over two days.
2024
TANE received the METI Director-General's Award (Product), PSC Award and PCA Cloud Award at the U-22 Programming Contest.Official results ↗
2025
Selected for Mitou Junior with an AI guidebook app. Worked on it for three months before withdrawing to focus on entrance exams.
2026.03
Graduated from high school.
2026.04–
Entered Keio University's Faculty of Policy Management.
2026.09
Traveled solo to San Francisco and Los Angeles to visit universities and connect with people in tech.

Use PhysDraft

Go to the app's sign-in page.
Sign up with a passkey or Google and start with a free trial (first 10 problems).

Try your own problem