Comparison

Formula to TeX vs Sigmakey

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Formula to TeX

Features
Read full description

Turn any math formula into LaTeX. Just point your camera and tap. "Math to LaTeX" uses AI to recognize mathematical expressions from photos and convert them into clean, ready-to-use LaTeX code. Whether it's a handwritten equation on a whiteboard, a formula in a textbook, or a screenshot from a PDF - snap it, crop it, and get your LaTeX in seconds. KEY FEATURES - Camera & Photo Library. Take a photo directly or pick an existing image from your library. - Smart Cropping. Use the interactive crop tool to select exactly the formula you need. Drag corners, move the selection, and get precise results every time. - AI-Powered Recognition. Advanced AI accurately converts both printed and handwritten math into LaTeX. - Live Preview. See the rendered formula in real time as you edit the LaTeX code. - Edit & Refine. Tweak the extracted LaTeX right in the app before exporting. - Copy LaTeX. One tap to copy the code to your clipboard, ready to paste into Overleaf, LaTeX editors, or any document. - Save as Image. Export the rendered formula as a high-quality PNG to your Photos. - Formula History. Every extracted formula is saved locally. Browse, revisit, and re-edit your past conversions anytime. PERFECT FOR - Students digitizing textbook problems and lecture notes - Researchers converting equations for academic papers - Teachers preparing digital course materials - Anyone working with LaTeX documents who wants to save time Stop retyping formulas by hand. Let "Math to LaTeX" do the work. Terms of Use: https://vadbeg.github.io/math-to-latex/terms-of-use/ Privacy Policy: https://vadbeg.github.io/math-to-latex/privacy-policy/

About

Sigmakey

This utility provides a specialized keyboard for typing mathematical expressions, including fractions, roots, and Greek letters, directly within any app. It supports LaTeX, Unicode, and image output, with on-device processing for privacy and speed.

Highlights
  • Full math keyboard layout
  • Two-dimensional cursor for exponents/numerators
  • Type LaTeX, Unicode, or rendered image
  • On-device typesetting, no network required
  • Symbol search, recent, and favorite symbols
Features
Read full description

Sigmakey is a math keyboard for people who need to type actual math, anywhere you can type at all. Fractions, exponents, roots, Greek letters, and matrices sit one tap away, and the cursor moves right into a numerator or an exponent, so scientific notation looks the way it should. - A full math keyboard layout that works in any app with a text field - A two-dimensional field with a cursor that steps into fractions and powers - Type LaTeX, plain Unicode, or a rendered image, whichever the app expects - Everything typeset on device, with no network - Search for a symbol, or grab a recent or a favorite Drop an equation into a note, a message, or a homework app without hunting through menus. Privacy Policy: https://docs.google.com/document/d/e/2PACX-1vTDX9pxPOlUJl_skVUHPi99mAw0y2B2BYd_v1mJkoF3xW3rlOcW5KlYd4t93MMbbGhctSTnBTy7d_l6/pub Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

Formula to TeX4 screens
Sigmakey4 screens

Verdict

The call

The clearest difference is iOS requirement: Formula to TeX at 17.6 against Sigmakey's 26.0. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Formula to TeX sells 2 in-app purchases, starting at $2.99 per 7 days and Sigmakey sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 7 level
Formula to TeX versus Sigmakey: the parameters behind the verdict, then further details
ParameterFormula to TeXSigmakey
PriceFreeFree
Rating—2.0 (1 ratings) — better
Number of ratings—1 — better
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhoneiPhone, iPad — better
Requires iOS17.6 — better26.0
Further details — not scored
Size9 MB13 MB
Age rating4+4+
DeveloperVADZIM TSITKOAndrii Bashta

In-app purchases

2 purchases

Formula to TeX

Subscriptions2
  • Weekly Unlimited Access$2.997 Days
  • Yearly Unlimited Access$24.991 Year
1 purchases

Sigmakey

One-time1
  • Sigmakey Pro$9.99

Questions

Is Formula to TeX free?
Formula to TeX is free to download, with in-app purchases available.
Is Sigmakey free?
Sigmakey is free to download, with in-app purchases available.
Do Formula to TeX or Sigmakey have ads?
Neither Formula to TeX nor Sigmakey shows ads.

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