Learn Objective C Programming vs R47 RPN Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Learn Objective C Programming
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Learn Objective C Programming is a complete learning app designed for beginners, students, developers, and anyone interested in Apple application development. Objective C is a powerful programming language that has played an important role in the development of applications for iPhone, iPad, and Mac. This app helps you understand Objective C concepts through structured lessons, practical code examples, quizzes, and useful programming resources. Whether you are starting from the basics or preparing for a technical interview, you can learn at your own pace and improve your programming knowledge step by step. Learn Objective-C Programming is your ultimate guide to mastering Objective-C, one of the most important programming languages for app development. Whether you're a beginner or an experienced developer, this app offers detailed tutorials, hands-on exercises, and interactive quizzes to help you build strong programming skills and create efficient apps. Key Features: Comprehensive Tutorials: Learn the fundamentals of Objective-C, including syntax, object-oriented programming (OOP), memory management, and more. Bookmark: Save key lessons for quick reference and easy review. Syntax Highlighting: Follow along with clear, syntax-highlighted code examples to enhance your learning experience. Text-to-Speech: Listen to tutorials and explanations on the go with the app's text-to-speech feature. Tips and Tricks: Learn programming best practices and shortcuts for faster, cleaner code. Interview Questions: Prepare for job interviews with a curated list of common Objective-C questions. FAQs: Get quick answers to frequently asked questions and resolve any challenges you encounter. Whether you're learning to develop iOS apps or improving your coding skills, "Learn Objective-C Programming" provides all the tools and knowledge you need to succeed. Download now and start mastering Objective-C today! Build a strong understanding of Objective C and improve your programming skills with structured lessons, practical examples, and interactive learning resources. Download Learn Objective C Programming and begin your coding journey today.
R47 RPN Calculator
This scientific calculator uses Reverse Polish Notation (RPN) to help you break down complex problems. It offers a full 47-series instruction set with advanced functions and a program editor. The free version includes extensive tutorials and documentation.
- RPN scientific calculator
- 47-series instruction set
- Program editor
- Tutorial library
- Offline functionality
- Light and dark themes
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An RPN calculator isn't just a tool for getting answers like a traditional exam calculator—it's a way of thinking. It mirrors how you naturally break problems into steps, making it more like an extension of your mind than a shortcut. A full HP-style RPN scientific calculator — on iPhone and iPad, offline, with no ads or tracking. 47 Calculator is a programmable Reverse Polish Notation scientific calculator. Trigonometry, logarithms, statistics, probability, finance, complex numbers, base conversions, matrix operations, numerical solvers — the full 47-series instruction set, in your pocket. Free includes the calculator, a program editor for reading and writing 47-series programs, reference documentation, and a full tutorial library — probability and statistics, finance, numerical methods, programming patterns, advanced RPN techniques. The Pro version adds the Explorer — browse every menu, flag, mode, and operation the engine supports, searchable and cross-linked. Works fully offline after first launch. Light and dark themes. No ads, no third-party analytics, no tracking, no account required.
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Verdict
The clearest difference is price: R47 RPN Calculator at Free against Learn Objective C Programming's $1.99. R47 RPN Calculator also leads on update cadence (every 3 days vs every 20 months). Learn Objective C Programming's advantage is in-app purchases (none vs 1) and iOS requirement (13.0 vs 15.6). 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
R47 RPN Calculator is free to download; Learn Objective C Programming costs $1.99 up front. R47 RPN Calculator sells 1 one-off in-app purchase. Learn Objective C Programming asks for nothing beyond the download.
Learn Objective C Programming ships an update every 20 months, R47 RPN Calculator every 3 days. The most recent releases landed on September 13, 2026 and September 20, 2026 respectively.
| Parameter | Learn Objective C Programming | R47 RPN Calculator |
|---|---|---|
| Price | $1.99 | Free — better |
| Rating | — | 5.0 (23 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 23 — better |
| Update frequency | Every 20 months | Every 3 days — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 — better | 15.6 |
| Further details — not scored | ||
| Size | 35 MB | 61 MB |
| Age rating | 17+ | 4+ |
| Developer | Muhammad Mubeen | MARCEL DAN |
In-app purchases
Learn Objective C Programming
No in-app purchases
R47 RPN Calculator
- Pro Pack$4.99





