Comparison

Master English vs RAIO App

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

Head to head
About

Master English

Learn to speak English fluently with AI. This app creates personalized programs for adult Spanish speakers aiming for advanced English proficiency for their careers. Practice real-life conversations with AI avatars and receive personalized feedback on pronunciation.

Highlights
  • Personalized AI-driven learning programs
  • Advanced English conversation practice with AI avatars
  • Real-time pronunciation feedback
  • Customized lessons based on learning pace
  • Career-focused English proficiency development
  • Support for all starting levels
Features
Read full description

¡Aprende a hablar inglés con fluidez con IA! Master English es una app de IA diseñada para adultos hispanohablantes que desean alcanzar un nivel avanzado de inglés para su carrera. Al instalar la app, te crearemos un programa personalizado, adaptado a tu nivel y necesidades. Con este programa podrás aprender todo lo que necesitas para hablar inglés a nivel avanzado. También ganarás confianza practicando conversaciones basadas en situaciones reales con avatares de IA. Y si tienes alguna duda sobre el aprendizaje del inglés, tu tutor de IA personal responderá tus preguntas. A medida que practiques con la app Master English, nuestra tecnología de aprendizaje patentada optimizará las lecciones según tu ritmo y te proporcionará feedback personalizado sobre tu pronunciación en inglés. Esto te permitirá mejorar tus habilidades en inglés de la manera más eficiente posible. Al completar el programa Master English, serás capaz de mantener conversaciones en inglés con confianza y aplicar a ofertas de trabajo donde el inglés sea un requisito. Nuestro programa ha sido creado por decenas de profesores de inglés certificados, especialistas en ciencia de datos e ingenieros altamente cualificados que trabajan arduamente en equipo para brindarte la mejor experiencia de aprendizaje en línea y ayudarte a alcanzar un nivel avanzado de inglés. En Master English, creemos que todos deberían tener la oportunidad de aprender a hablar inglés al nivel requerido para los trabajos mejor remunerados. Apoyamos todos los niveles de inicio: principiante, básico, intermedio o superior. El programa incluye de 3 a 5 lecciones de inglés por semana, cada una de las cuales toma unos 45 minutos para completarse. Dependiendo de tu nivel inicial y ritmo de aprendizaje, alcanzar un nivel avanzado de inglés tomará entre 6 y 12 meses. ¡Si estás dispuesto a invertir este tiempo en mejorar tu inglés, serás recompensado con excelentes resultados! TEN EN CUENTA QUE Necesitas una suscripción para acceder a nuestro programa y a las herramientas de esta aplicación. El cargo se lleva a cabo tras la confirmación del pedido desde la cuenta de iTunes. La suscripción se renueva automáticamente hasta que la renovación automática es cancelada al menos 24 horas antes de la finalización del periodo de pago vigente. Tu cuenta de iTunes será cargada mensualmente durante las 24 horas previas a la finalización del periodo de pago actual, salvo que cambies los detalles de tu suscripción en tus ajustes de cuenta. El precio mensual de la suscripción es siempre el mismo. Una vez completada la compra, puedes gestionar tu suscripción en los ajustes de cuenta. Si la suscripción es cancelada, el acceso a los cursos y las funciones de la aplicación expirarán al terminar el periodo de pago vigente. Términos de Uso: https://www.masterenglish.com/es-latam/terminos-de-uso/?hf=1 Política de Privacidad: https://www.masterenglish.com/es-latam/politica-de-privacidad/?hf=1 Comienza hoy tu camino hacia un nivel avanzado de inglés con la aplicación Master English. Es una decisión de la que nunca te arrepentirás. ¡Nos vemos al otro lado!

About

RAIO App

This app uses spaced repetition technology and real-life sentences to help you learn grammar and vocabulary in context. It aims to improve retention, reduce translation in your head, and help you start thinking in the language you're learning.

Highlights
  • Spaced repetition technology
  • Sentence-based learning
  • Learn grammar and vocabulary in context
  • Reduce translation in your head
  • Think in the target language
  • Personalized progress reports
  • Gamification features
Features
Read full description

RAIO is a language learning mobile app that allows language learners to review sentences using the power of spaced repetition technology. With RAIO, learners can effortlessly learn grammar and vocabulary at the same time, without having to study complex grammar rules or do boring grammar drills. The app is designed to help learners stop forgetting and getting stuck in conversations having to translate in their as much as they would when learning with traditional method. The app’s sentence-based approach is another key feature that sets RAIO apart from traditional language learning methods. Rather than teaching using isolated vocabulary words or abstract grammar rules, RAIO uses real-life sentences that are commonly used in everyday conversations. This approach allows learners to acquire vocabulary and grammar in context, which enhances their understanding of the language and improves their ability to communicate effectively. Spaced repetition, the underlying technology of RAIO’s language learning app, is a technique used by professional language learners and polyglots to acquire languages faster and with less effort. This method of learning is based on the principle of spacing out the review of previously learned material to optimize long-term retention. By scheduling review sessions based on the user’s progress and difficulty level, RAIO’s spaced repetition technology allows learners to remember words and grammar structures better and for longer periods of time, leading to a faster and more effective language learning experience, regardless of which proficiency level they start with. Another benefit of using RAIO is that learners can slowly start to think in the language. By reviewing sentences in context and focusing on the meaning rather than the individual words or rules, learners can internalize the language and start to think in it. This improves their ability to communicate effectively and increases their fluency in the language. In summary, RAIO is an innovative mobile app that revolutionizes language learning with its spaced repetition technology and sentence-based approach. The app’s features, such as its review system, audio recordings, translations in multiple languages, personalized progress reports, and gamification features, enhance the learning experience and provide learners with motivation and a sense of accomplishment. By using RAIO, learners can effortlessly learn grammar and vocabulary, stop forgetting as much, stop getting stuck in conversations having to translate in their head as much, and slowly start to think in the language. Terms of Use: https://kaleanders.com/raio-app-terms

Screenshots

Master English4 screens
RAIO App4 screens

Verdict

The call

The clearest difference is review sentiment: Master English at 79% against RAIO App's 20%. Master English also leads on rating (4.9 vs 2.7) and ratings volume (32K vs 43). RAIO App's advantage is monetization model (free with in-app purchases vs subscription). 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. Master English sells 1 in-app purchase, starting at $13.99 per month and RAIO App sells 2 in-app purchases, starting at $19.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Master English holds the better App Store score, 4.9 against 2.7. That said, the two scores are not equally well evidenced: Master English has 32K ratings behind it against 43, so its average is the more settled of the two. Written reviews point the same way: 79% of Master English's written reviews are positive against 20% of RAIO App's.

UpkeepUpdate frequency

Master English ships an update every 2 weeks, RAIO App every 6 weeks. The most recent releases landed on November 5, 2026 and November 3, 2026 respectively.

Scorecard6 real differences · 5 level
Master English versus RAIO App: the parameters behind the verdict, then further details
ParameterMaster EnglishRAIO App
PriceFreeFree
Rating4.9 (32K ratings) — better2.7 (43 ratings)
Positive reviews78.7% of reviews — better20.0% of reviews
Number of ratings32K — better43
Update frequencyEvery 2 weeks — betterEvery 6 weeks
AdsNoNo
In-app purchasesYesYes
MonetizationSubscriptionFree with in-app purchases — better
Best chart rank#126 — better—
DevicesiPhone, iPadiPhone, iPod
Requires iOS16.015.0 — better
Further details — not scored
Size188 MB88 MB
Age rating+44+
DeveloperMaster EnglishKale Anders

Customer experience

Master English

All ratings31,446 ratings
Positive98.4%
Neutral0.7%
Negative0.8%
Written reviews451 reviews
Positive78.7%
Neutral4.7%
Negative16.6%

RAIO App

All ratings42 ratings
Positive40.5%
Neutral4.8%
Negative54.8%
Written reviews10 reviews
Positive20.0%
Neutral10.0%
Negative70.0%

Bugs and requests

Master English

Reported bugs

2 issues
  • Subscription issues and continued billing after cancellation
  • Inability to access the app after initial setup

Requested features

3 requests
  • Ability to rotate the app on iPad
  • Progress tracking and assessment tests
  • More interactive and gamified learning

RAIO App

Not enough reviews yet to summarise bugs or requests.

In-app purchases

1 purchases

Master English

Subscriptions1
  • Programa de inglés$13.991 Month
2 purchases

RAIO App

Subscriptions2
  • Monthly - Standard Plan1 Month trial$19.991 Month
  • Annual - SAVE 20%!1 Month trial$179.991 Year

Questions

Is Master English free?
Master English is free to download, with in-app purchases available.
Is RAIO App free?
RAIO App is free to download, with in-app purchases available.
Which has better reviews, Master English or RAIO App?
Master English is rated higher. Master English averages 4.9 out of 5 from 32K ratings, while RAIO App averages 2.7 from 43 ratings.
Do Master English or RAIO App have ads?
Neither Master English nor RAIO App shows ads.
Which is updated more often, Master English or RAIO App?
Master English ships an update every 2 weeks, and RAIO App every 6 weeks. Most recently, Master English was updated on November 5, 2026 and RAIO App on November 3, 2026.

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