Comparison

Stellarium Mobile vs PseudoPlay

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

Head to head
About

Stellarium Mobile

Explore the night sky with a real-time planetarium. Identify stars, planets, constellations, and satellites by simply pointing your phone. Offers detailed astronomical data and cultural constellation interpretations.

Highlights
  • Real-time sky simulation
  • Identify stars, planets, satellites
  • Constellation shapes and illustrations
  • Deep sky object catalog
  • Night mode for eye comfort
  • Telescope control (Plus)
Features
Currently charting
Read full description

Stellarium Mobile is a planetarium app that shows exactly what you see when you look up at the stars. Identify stars, constellations, planets, comets, satellites (such as the ISS), and other deep sky objects in real time in the sky above you in just a few seconds, just by pointing the phone at the sky! This astronomy application has an easy to use and minimalist user interface, that makes it one of the best astronomical applications for adults and children who want to explore the night sky. Stellarium Mobile features: • View an accurate night sky simulation of stars and planets for any date, time and location. • Dive in a collection of many stars, nebulas, galaxies, star clusters and other deep sky objects. • Zoom on realistic Milky Way and Deep Sky Objects images. • Discover how people living in other regions of the planet see the stars by selecting the shapes and illustrations of the constellations for many sky cultures. • Track artificial satellites, including the International Space Station. • Simulate landscape and atmosphere with realistic sunrise, sunset and atmosphere refraction. • Discover 3D rendering of the major solar system planets and their satellites. • Observe the sky in night mode (red) to preserve your eyes adaptation to darkness. Stellarium Mobile contains in-app purchases allowing to upgrade to Stellarium Plus. With this upgrade, the app will display objects as faint as magnitude 22 (versus magnitude 8 in the base version) and enable advanced observing features. Stellarium Plus features (unlocked with in-app purchase): • Reach the limit of knowledge by diving in a massive collection of stars, nebulas, galaxies, star clusters and other deep sky objects:   - All known stars: Gaia DR2 catalog of over 1.69 billion stars   - All known planets, natural satellites and comets, and many other minor solar system objects (10k asteroids)   - Most known deep sky objects: a combined catalog of over 2 million nebulas and galaxies • Zoom almost without limits on high resolution images of deep sky objects or planetary surfaces. • Observe in the field, even without internet connection, with a "reduced" set of data: 2 million stars, 2 million Deep Sky Objects, 10k asteroids. • Control your telescope through WIFI: drive any GOTO telescope compatible with NexStar, SynScan or LX200 protocols. • Prepare your observing sessions using the advanced observation tools, to predict a celestial object observability and transit times. Stellarium Mobile is made by the original creator of Stellarium, the well known open source planetarium and one of the best astronomy applications on Desktop PC. Your can unlock the full features using either a one time payment or a subscription. See In-App Purchase section for the subscription price available in your country. Payment will be charged to your iTunes account. Your subscription will automatically renew unless cancelled 24 hours prior to the end of the current period. Auto renewal may be turned off at any time by going to your account settings after purchases. Terms of service: https://stellarium-labs.com/stellarium-mobile-plus/stellarium-mobile-terms-of-use Privacy policy: https://www.stellarium-labs.com/privacy-policy-for-stellarium-mobile

About

PseudoPlay

Features
Read full description

PseudoPlay es una herramienta diseñada para que aprender lógica de programación sea una experiencia más clara, visual y accesible. En lugar de obligarte a imaginar lo que ocurre dentro de un algoritmo, la app te permite ver cada paso de forma real y comprensible. Puedes escribir pseudocódigo libremente o construirlo con bloques interactivos, y en ambos casos observar cómo cambian las variables, cómo fluye cada condición y cómo avanza la ejecución línea por línea. La aplicación está pensada para acompañarte desde el primer momento. Si prefieres comenzar con ejemplos, encontrarás algoritmos predeterminados organizados por niveles que puedes explorar, modificar y ejecutar para entender cómo funcionan. Si prefieres crear tu propio pseudocódigo, el editor te permitirá escribir de forma intuitiva, con sugerencias que te ayudan a evitar errores comunes sin interrumpir tu proceso creativo. Al ejecutar un algoritmo, PseudoPlay muestra de manera detallada cada acción que ocurre en el programa. Cada cambio se registra en una prueba de escritorio visual que te permite analizar con claridad el comportamiento completo del algoritmo. Esta vista es especialmente útil para quienes están aprendiendo, ya que elimina la confusión típica de las pruebas manuales y permite comprender realmente el porqué de cada resultado. PseudoPlay funciona completamente de manera local y no requiere conexión a internet. Está diseñada para que cualquier estudiante, principiante o persona interesada en mejorar su lógica de programación pueda practicar en cualquier momento. Su objetivo es ayudarte a entender la programación desde la claridad, la interacción y la práctica, haciendo que cada algoritmo cobre sentido ante tus ojos y fortaleciendo tu comprensión desde la base.

Screenshots

Stellarium Mobile4 screens
PseudoPlay4 screens

Verdict

The call

The clearest difference is price: Stellarium Mobile at Free against PseudoPlay's $1.99. Stellarium Mobile also leads on chart position (#63 vs unranked). PseudoPlay's advantage is in-app purchases (none vs 2) and update cadence (every 2 days vs every 5 weeks). On 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

Stellarium Mobile is free to download; PseudoPlay costs $1.99 up front. Stellarium Mobile sells 2 in-app purchases, starting at $1.99 per month. PseudoPlay asks for nothing beyond the download.

UpkeepUpdate frequency

Stellarium Mobile ships an update every 5 weeks, PseudoPlay every 2 days. The most recent releases landed on November 10, 2026 and November 5, 2026 respectively.

Scorecard5 real differences · 6 level
Stellarium Mobile versus PseudoPlay: the parameters behind the verdict, then further details
ParameterStellarium MobilePseudoPlay
PriceFree — better$1.99
Rating4.8 (40K ratings) — better—
Positive reviews84.4% of reviews—
Number of ratings40K — better—
Update frequencyEvery 5 weeksEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
Best chart rank#63 — better—
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS1713.0 — better
Further details — not scored
Size456 MB20 MB
Age rating4+4+
DeveloperNoctua Software LtdDaniel Nuno

Bugs and requests

Stellarium Mobile

Reported bugs

3 issues
  • Compass not working properly
  • Favorites list disappearing
  • Inconsistent performance on different devices

Requested features

5 requests
  • Notifications for astronomical events
  • More customization options
  • Integration with camera for AR overlay
  • Better support for telescopes and mounts
  • Improved search and navigation

PseudoPlay

Not enough reviews yet to summarise bugs or requests.

In-app purchases

2 purchases

Stellarium Mobile

Subscriptions1
  • Stellarium PLUS7 Days trial$1.991 Month
One-time1
  • Stellarium PLUS$18.99
None

PseudoPlay

No in-app purchases

Questions

Is Stellarium Mobile free?
Stellarium Mobile is free to download, with in-app purchases available.
Is PseudoPlay free?
PseudoPlay costs $1.99, with no in-app purchases.
Do Stellarium Mobile or PseudoPlay have ads?
Neither Stellarium Mobile nor PseudoPlay shows ads.
Which is updated more often, Stellarium Mobile or PseudoPlay?
Stellarium Mobile ships an update every 5 weeks, and PseudoPlay every 2 days. Most recently, Stellarium Mobile was updated on November 10, 2026 and PseudoPlay on November 5, 2026.

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