Comparison

Castillo Digital vs GEM PRIMARY

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

Head to head

About

Castillo Digital

Access digital textbooks and teacher guides for students. Enhance lessons with interactive activities, videos, and exam generators. Available offline on all devices.

Highlights

Digital student books
Teacher guides
Interactive activities
Video resources
Exam generator
Editable planner
Offline access

Features

Read full description

Castillo le permite al docente la descarga de los libros de alumnos y las guías del maestro en versión digital. Cada serie está personalizada con diferentes recursos como actividades interactivas, videos, enlaces a sitios web, generador de exámenes, planificador editable y solucionarios para enriquecer su propuesta de clase. En todos los dispositivos. Podrá acceder a los recursos desde cualquier tableta o Smartphone. Offline. Una vez instalada la aplicación, podrá acceder a nuestros libros y otros recursos sin conexión a Internet. http://www.edicionescastillo.com/politicas-de-privacidad

About

GEM PRIMARY

Features

Read full description

Aplicación Móvil para alumnos y padres de GEM Grupo Escolar Morelos. Herramienta informativa para los miembros activos de GEM Grupo Escolar Morelos.

Screenshots

Castillo Digital3 screens

GEM PRIMARY4 screens

Verdict

The call

The clearest difference is update cadence: GEM PRIMARY at monthly against Castillo Digital's every 5 months. Castillo Digital's advantage is iOS requirement (9.0 vs 15.1). 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Castillo Digital ships an update every 5 months, GEM PRIMARY monthly. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

Scorecard2 real differences · 6 level

Castillo Digital versus GEM PRIMARY: the parameters behind the verdict, then further details
Parameter	Castillo Digital	GEM PRIMARY
Price	Free	Free
Positive reviews	13.0% of reviews	—
Update frequency	Every 5 months	Monthly — better
Ads	No	No
In-app purchases	No	No
Monetization	Free	—
Devices	iPhone, iPad, iPod — better	iPhone, iPod
Requires iOS	9.0 — better	15.1
Further details — not scored
Size	18 MB	37 MB
Age rating	4+	4+
Developer	Macmillan Administracion Corporativa, S.A. de C.V.	Uplift Educational Solutions

In-app purchases

None

Castillo Digital

No in-app purchases

None

GEM PRIMARY

No in-app purchases

Questions

Is Castillo Digital free?

Castillo Digital is free to download, with no in-app purchases.

Is GEM PRIMARY free?

GEM PRIMARY is free to download, with no in-app purchases.

Do Castillo Digital or GEM PRIMARY have ads?

Neither Castillo Digital nor GEM PRIMARY shows ads.

Which is updated more often, Castillo Digital or GEM PRIMARY?

Castillo Digital ships an update every 5 months, and GEM PRIMARY monthly. Most recently, Castillo Digital was updated on October 24, 2026 and GEM PRIMARY on October 30, 2026.