Short answer: yes, software made in Bangladesh that types physics, math and chemistry equations into Microsoft Word by voice exists - it is Azadi 24, and voice is only one of its three doors. Speak an equation, photograph one (a screenshot, a textbook page, even handwritten notes), or select text that states one - and Word or OneNote receives a real, editable Office equation object. Not a picture, not LaTeX source, no add-in, no Alt+= chord.
Measured accuracy, not a promise
The equation engine has a published, dated benchmark: 96.3% fully correct across 1400 test cases run 2026-08-19 against the live production system, with 99.6% delivering a valid editable Word equation. Full methodology - including what has NOT been measured - is on the accuracy page. One honest nuance from an independent buyer’s test: the photo and selected-text doors are the most accurate (9/10 on real HSC equations), because dictation adds a hearing step that they skip.
The spoken commands (the full list)
You can speak Bangla, English or a mix. These are the words the engine understands - each verified either in our own benchmark or in an independent tester’s hands:
| Say | What it does | Example |
|---|---|---|
| root over / রুট ওভার | puts what follows under a square root | “root over 3RT over M” → √(3RT/M) |
| divided by / ভাগ | a fraction | “x plus 1, divided by 2” → (x+1)/2 |
| to the power / টু দ্য পাওয়ার | an exponent | “e to the power minus x square” → e⁻ˣ² |
| subscript / superscript | an index below / above | “v subscript r-m-s” → vrms |
| bracket / ব্র্যাকেট | groups what follows in parentheses | “bracket m plus 2 mu” → (m + 2μ) |
| small / capital | picks the letter case - important for Greek letters | “small sigma” → σ (not Σ) |
| from X to Y | limits on an integral or sum | “integral from 0 to pi over 2” → ∫₀^(π/2) |
| over | a fraction inside limits | “pi over 2” → π/2 |
| a short pause, or a comma | marks where a group ends | “2 root x, plus 1” → 2√x + 1 |
| piecewise function, first case… | a case-by-case function with the big brace | “piecewise function f of x. first case… second case…” |
| limit x tends to… | a limit, stacked the textbook way | “limit x tends to 0, sin x over x” |
| chemistry, spoken directly | formulas, charges, coefficients, reaction arrows | “2 M-n-O-4 superscript minus, plus…” → 2MnO₄⁻ + … |
Measured: how you phrase it decides how accurate it is
We tested 20 equations (SSC through advanced physics) in two speaking styles, in a real voice against the live system (2026-08-29): phrased with the command words above, 18 of 20 came out exactly right; phrased casually, 14 of 20. Learning the table above is the single biggest accuracy boost - especially saying “small” / “capital” for Greek letters and letter case.
What does not work yet (we publish this too)
- A variable immediately after a subscript - in shapes like kBT the boundary lands wrong (the T rides into the subscript), even with a pause. The one consistent error in our 20-equation test. Rare at SSC/HSC level (it never appeared in the real HSC set); a one-click edit in Word fixes it, and the engine fix is at the top of our list.
- Kc-style concentration brackets. Spoken pH = -log[H⁺] comes out perfectly, brackets included (verified in three phrasings) - but in product shapes like [C]ᶜ[D]ᵈ/[A]ᵃ[B]ᵇ the [ ] brackets still drop, even when the structure and letter case are right. The photo and selected-text doors get it right.
- In photos, an italic l can be read as 1 (and O as 0). The result looks normal but is wrong - proofread T = 2π√(l/g)-class formulas taken from a photo. By voice, saying “small l” produces it perfectly.
This list is public for the same reason the accuracy page publishes its worst number: you should know exactly what you are buying, and a 7-day refund covers the rest.
Where the equation lands
Microsoft Word and OneNote receive the real equation object - click into it, edit it, it is a native Office equation. Everywhere else (Google Docs, chat, email) receives the same equation as a clean readable Unicode line. Google Docs cannot accept a pasted equation object at all - its editor only opens via Insert > Equation and it flattens pasted equation markup to text. That is a Google limitation, and we say so rather than pretend otherwise.
Try it
- Download Azadi 24 - free Bangla + English voice typing, and free AI tasks each month to test Azadi Math yourself.
- See the published accuracy benchmark or the full feature list.
- New to voice typing? The step-by-step guide.