Comparison

Math Keyboard vs Lumo

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

Head to head
About

Math Keyboard

This custom keyboard simplifies typing mathematical and physics symbols, including Greek letters and superscripts/subscripts. Seamlessly input formulas into any app without needing to copy and paste from external sources. Enhance your notes, reports, and messages with ease.

Highlights
  • Superscripts/subscripts for numbers, letters, and symbols
  • Greek letters support
  • Wide variety of math symbols
  • Familiar keyboard layout
  • Quick tab switching
  • Cursor control via long-press
Features
Read full description

Struggling to type math symbols on your phone? Math Keyboard is a custom keyboard that lets you input the symbols, Greek letters, superscripts, subscripts, and more commonly used in math and physics — directly from your keyboard. No more searching the web every time just to copy a symbol. From class notes and reports to chats and memos, type math expressions smoothly in any app. 【Key Features】 Superscript / subscript for numbers, letters, and symbols Full Greek alphabet support Rich set of math symbols (basic) Custom keyboard support 【Highlights】 Same look and feel as the standard keyboard Shift key to toggle superscript / subscript (or uppercase / lowercase) Easy tab switching within the keyboard Long-press the Space key to move the cursor Add and reorder categories 【About Pro】 The free version has limited categories. Upgrade to Pro to unlock all categories, including: Standard alphabet Advanced math symbols (calculus) Arrows Logic & sets Custom keyboard You can also switch the alphabet display style between italic and regular. ※ This in-app purchase is a one-time payment. ※ To use this keyboard, you need to add it and enable "Allow Full Access" in the Settings app. (We do not collect any of your input — your privacy is fully protected.)

About

Lumo

Features
Read full description

O Lumo é um app de comunicação visual para famílias com crianças que ainda não falam ou se comunicam de outras formas. Com cards, rotinas e pictogramas, o Lumo ajuda a transformar escolhas simples em comunicação. A criança toca os cards, monta uma frase e o app fala em voz alta — no idioma da família. COMO O LUMO AJUDA • Cards com pictogramas para pedir, escolher e contar • Montagem de frases por toque, com fala em voz alta • Rotinas visuais para o dia: manhã, banho, escola, dormir • Modo Criança em tela cheia, protegido por PIN • Vários perfis — um para cada criança • Crie cards próprios com foto ou pictograma 13.798 PICTOGRAMAS ARASAAC Biblioteca completa do ARASAAC, com busca em quatro idiomas. Tudo já vem no app — funciona sem internet. QUATRO IDIOMAS Português (Brasil), Português (Portugal), Inglês e Espanhol. Cada um com suas palavras e variações. PRIVACIDADE PRIMEIRO Os dados ficam no aparelho. Sem cadastro, sem login, sem rastreamento, sem anúncios. A foto, o nome e o uso da criança não saem do dispositivo. GRATUITO PARA SEMPRE O Lumo é e sempre será gratuito para famílias. Sem assinatura, sem Premium, sem compras que desbloqueiem nada. — O Lumo é uma ponte de comunicação. Não substitui o acompanhamento de fonoaudiólogo, terapeuta ou educador. Símbolos pictográficos: ARASAAC (arasaac.org), autor Sergio Palao, licença CC BY-NC-SA 4.0, propriedade do Governo de Aragão (Espanha).

Screenshots

Math Keyboard2 screens
Lumo4 screens

Verdict

The call

The clearest difference is in-app purchases: Lumo at none against Math Keyboard's 1. Lumo also leads on iOS requirement (16.4 vs 26.2). On price, ads 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. Math Keyboard sells 1 one-off in-app purchase. Lumo asks for nothing beyond the download.

Scorecard2 real differences · 8 level
Math Keyboard versus Lumo: the parameters behind the verdict, then further details
ParameterMath KeyboardLumo
PriceFreeFree
Rating3.3 (12 ratings) — better—
Positive reviews0.0% of reviews—
Number of ratings12 — better—
Update frequencyEvery 5 weeks—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.216.4 — better
Further details — not scored
Size2 MB62 MB
Age rating4+4+
DeveloperYuta NishimatsuThiago Tavares

In-app purchases

1 purchases

Math Keyboard

One-time1
  • MathKeyboard Pro$5.99
None

Lumo

No in-app purchases

Questions

Is Math Keyboard free?
Math Keyboard is free to download, with in-app purchases available.
Is Lumo free?
Lumo is free to download, with no in-app purchases.
Do Math Keyboard or Lumo have ads?
Neither Math Keyboard nor Lumo shows ads.

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