# Space Telescope App vs RPN 50g

The clearest difference is review sentiment: RPN 50g at 100% against Space Telescope App's 39%. RPN 50g also leads on rating (5.0 vs 4.1) and in-app purchases (none vs 4). Space Telescope App's advantage is price (Free vs $5.99) and ratings volume (31 vs 1). On update cadence, device support and iOS requirement there is nothing between them.

Space Telescope App is free to download; RPN 50g costs $5.99 up front. Space Telescope App sells 4 in-app purchases, starting at $4.99 per month. RPN 50g asks for nothing beyond the download.

RPN 50g holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: Space Telescope App has 31 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 39% of Space Telescope App's written reviews are positive against 100% of RPN 50g's.

Space Telescope App ships an update every 10 days, RPN 50g weekly. The most recent releases landed on November 3, 2026 and November 10, 2026 respectively.

## The numbers

| Metric | Space Telescope App | RPN 50g |
| --- | --- | --- |
| Price | **Free** | $5.99 |
| Rating | [4.1 (31 ratings)](https://appshunter.io/ios/app/space-telescope-app/id1603876992/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/rpn-50g/id6811794850/reviews)** |
| Number of ratings | **31** | 1 |
| Positive reviews | 38.7% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 10 days | **Weekly** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 104 MB | 30 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [KAKHA GIORGASHVILI](https://appshunter.io/developer/1501353984) | [Guglielmo Pasa](https://appshunter.io/developer/417854438) |

## What reviewers say

### Space Telescope App

[App page](https://appshunter.io/ios/app/space-telescope-app/id1603876992)

Explore the universe with real-time updates and stunning visuals from NASA's James Webb Space Telescope. Engage with expert insights, join community discussions, and test your knowledge with interactive quizzes. Discover distant galaxies and unlock the secrets of the early universe.

**Highlights:** Live mission updates, Breathtaking image gallery, Expert Q&A with astronomers, Community discussions, Interactive space quizzes, 3D solar system explorer, Exclusive wallpapers

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Monthly Ad-Free Plan | $4.99 | per month |
| Ad-Free Annual Access | $29.99 | per year |
| Premium | $2.99 | one-time |
| Buy 1M Points | $99.99 | one-time |


### RPN 50g

[App page](https://appshunter.io/ios/app/rpn-50g/id6811794850)

This app emulates the powerful HP 50g graphing calculator, bringing its advanced features for engineering, physics, and mathematics to your mobile device. It replicates the original hardware and firmware, offering a complete RPN and RPL calculator experience with extensive graphing and programming capabilities.

**Highlights:** Advanced computer algebra system, Full scientific calculator functions, 2D and 3D graphing capabilities, RPL and UserRPL programming, Equation Library with over 300 equations, RPN or algebraic entry modes, SD card file integration

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Space Telescope App free?

Space Telescope App is free to download, with in-app purchases available.

### Is RPN 50g free?

RPN 50g costs $5.99, with no in-app purchases.

### Which has better reviews, Space Telescope App or RPN 50g?

RPN 50g is rated higher. Space Telescope App averages 4.1 out of 5 from 31 ratings, while RPN 50g averages 5.0 from 1 ratings.

### Do Space Telescope App or RPN 50g have ads?

Space Telescope App shows ads; RPN 50g does not.

### Which is updated more often, Space Telescope App or RPN 50g?

Space Telescope App ships an update every 10 days, and RPN 50g weekly. Most recently, Space Telescope App was updated on November 3, 2026 and RPN 50g on November 10, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*