Using it every day before my advanced math exam. Integrals, analytic geometry, combinatorics. Point the camera and I get the full solution. Honestly didn't believe it would work this well.
Mark K.
Kraków
Edition 2026 · Poland
[ 01 ] · A calculator. With a brain.
Snap
the photo. Get
the answer.
KalkMate looks exactly like an ordinary simple calculator. But it hides something no other one has — a concealed camera and an AI model trained on thousands of problems from the last decade.
You type nothing. You key in nothing. Just point the lens at the problem — and 1.2 seconds later the step-by-step solution appears on the OLED screen.
Battery
~6h
Answer
1.2s
Subjects
04
OV2640 camera
HIDDEN · 2MP
OLED · 256×64
∫ x² dx = x³/3 + C
KM v3.0
MATHEMATICS · ADV.✦PHYSICS✦CHEMISTRY · 2014–2025✦BIOLOGY✦OCR < 1.2s✦OLED 256×64✦ESP32-WROVER✦MADE IN PL✦MATHEMATICS · ADV.✦PHYSICS✦CHEMISTRY · 2014–2025✦BIOLOGY✦OCR < 1.2s✦OLED 256×64✦ESP32-WROVER✦MADE IN PL✦MATHEMATICS · ADV.✦PHYSICS✦CHEMISTRY · 2014–2025✦BIOLOGY✦OCR < 1.2s✦OLED 256×64✦ESP32-WROVER✦MADE IN PL✦
[ 02 ] · Workflow
Three moves. Zero
typing.
The whole interaction fits into a single gesture. No spelling out the problem, no keying in the formula, no hunting for a button.
[ Avg. time in use: 5.4 sec ]
01OV2640 · AF
Point the camera.
The hidden 2MP camera focuses automatically. One command handles it all: a problem from an exam paper, a notebook or a screen — as long as the text is visible.
STEP / AIM
02OCR + LLM
AI reads it.
The AI model reads the problem, classifies the subject and type, and picks the right solving method.
STEP / ANALYSIS
03256×64 OLED
Solution on OLED.
A complete step-by-step solution with formulas in LaTeX format. The result in under 1.2 seconds.
STEP / ANSWER
[ 03 ] · Subject coverage
Four science
subjects.
Trained on thousands of problems from the last 10 years. It recognises the task type, picks the right method and shows the full reasoning.
MAT · basic · extended
Mathematics
Example
f(x) = ax² + bx + c
- →Functions, limits, derivatives
- →Analytic geometry
- →Sequences, probability, combinatorics
FIZ · extended
Physics
Example
E = ½mv² + mgh
- →Mechanics, thermodynamics
- →Electromagnetism
- →Optics, nuclear physics
CHE · extended
Chemistry
Example
2H₂ + O₂ → 2H₂O
- →Stoichiometry, equilibria
- →Organic chemistry
- →Solutions, electrochemistry
BIO · extended
Biology
Example
ATP ⇌ ADP + Pᵢ
- →Genetics, biochemistry
- →Physiology, ecology
- →Evolution, biotechnology
10 years
years of training data
94%
Accuracy on exam problems
1.2s
Average response time
[ 04 ] · Hardware
Polish hardware.
Down to the last detail.
PCB designed, soldered and tested in Poland. Every device carries a serial number and a 24-month warranty.
/ Compute01 / 04
- MCU
- ESP32-S3-WROOM-1-N16R8
- Memory
- 8 MB PSRAM · 16 MB Flash
- WiFi
- 2.4 GHz 802.11 b/g/n
/ Optics02 / 04
- Sensor
- OmniVision OV2640 · 2 MP
- Field of view
- 78°
- Autofocus
- Yes · 10–∞ cm
/ Display03 / 04
- Screen
- OLED SSD1322
- Resolution
- 256 × 64 px
- Contrast
- 10000:1
/ Power04 / 04
- Battery
- LiPo 3.7 V · 1500 mAh
- Runtime
- ~8 h mixed use
- Charging
- USB-C · ~2 h
kalkmate@firmware ~ % esptool --port COM4 read_mac
[ 05 ] · Archive
From the workshop, straight
to your pocket.
Gallery · 05 shots
2025–2026 · KRK · PL
01 · Prototype v1
First soldered board — bring-up
02 · Display
OLED SSD1322 256×64
03 · Camera
OV2640 inside the casing
04 · PCB
Routed in Poland
05 · Test
Solving a 2024 exam problem
/ USER REVIEWS
What students say.
4.8/5 · 6 reviews
Verified purchase
Dad bought it for me for physics because tutoring was too expensive. Got 78% on the mock instead of 52%. Not sure if it's only because of the calculator but it helped a lot with forces and electricity.
Anna W.
Warsaw
Looks exactly like a normal simple calculator on the outside. Nobody at school knows what it is. Organic chemistry and stoichiometry stopped being a problem because of this.
Peter S.
Wrocław
Advanced biology was a nightmare, especially genetics and crossbreeding problems. Now I just photograph the problem and read how to solve it step by step. Highly recommend.
Sophie M.
Gdańsk
Generally a solid product. Battery lasts a full day of studying. Once had an issue where poor lighting made it struggle to read the problem but fixing the lighting sorted it. Good purchase.
Thomas L.
Poznań
Instead of tutoring at 30 EUR per hour I have this. One-time cost and works for all subjects. My mum was sceptical but now she also thinks it was a good idea.
Kate R.
Łódź
[ 06 ] · FAQ
Questions everyone
has.
Didn't find your answer? Drop me a line — I reply within 24h.
kontakt@kalkmate.pl ↗