RPN vs EMC Debug
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
RPN
Experience a faithful simulation of the groundbreaking HP-65 programmable calculator on your iPhone. This app offers virtual program and data cards, a paper tape printer, and a robust card manager. Explore four distinct operating modes, including an enhanced "Super-65" option.
- Virtual program and data cards
- Virtual paper tape printer with AirPrint
- Database-driven card manager
- Create, delete, and organize unlimited cards
- Sharing via email, AirDrop, Dropbox, iTunes
- Paste and run existing HP-65 listings
- Four distinct operating modes
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World's first pocket computer! Now running on your iPhone. RPN-65 SD is the iPhone version of RPN-65 Pro, the first complete simulation of Hewlett-Packard's stunning HP-65 programmable calculator for iOS. Produced from 1974 to 1977 at an initial price of $795 (that's close to $5,000 today!), the HP-65 was a breakthrough. Not only was it programmable, it also contained a motorized magnetic card reader - and still fit into Bill Hewlett's shirt pocket. Experience this revolutionary calculator on your iPhone. With over 180 original HP programs included with the app, you can get started right away. "A work of art. Fantastic!" (MacBreak Weekly, episode 572) Features: • Virtual program and data cards • Virtual 2000-line paper tape printer supports AirPrint • Powerful database-driven card manager • Create, delete, label, and organize a virtually unlimited number of cards • Sharing: e-mail, AirDrop, Dropbox, iTunes, copy, paste, print • Paste existing HP-65 listings into RPN-65 and run them • "Live" display of stack, memory registers, program counter, flags • Reads program and data cards created by RPN-65 Pro • Reads data cards created by RPN-67 Pro/SD and RPN-97 Pro Run RPN-65 SD in any of 4 modes: 1 - Just like the original HP-65 2 - Like the original HP-65, but at much higher speed 3 - With many user-interface improvements, like backstep key or jump to any program step 4 - "Super-65" with 999 program steps, 120 labels, 120 registers, nested subroutines, and much more For details, free program downloads, calculator handbook and much more, visit the RPN-65 website: cuveesoft.ch/rpn65
EMC Debug
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[Professional EMC Solutions, Your On-site Technical Expert] Designed for electronics engineers and EMC specialists, this app is the ultimate tool to boost testing efficiency and solve electromagnetic interference issues on the spot. We understand the challenges of working in controlled environments where information access is critical. Key Features: 100% Offline Access: Perfect for signal-free shielding rooms and anechoic chambers. Access all EMC solutions and technical documents without an internet connection during lab tests. Comprehensive EMI Strategies: Proven solutions for Conduction (CE), Radiation (RE), ESD, Surge, and other common electromagnetic compatibility challenges. Quick Lookup & Diagnosis: Locate issues instantly with an intuitive interface. Get specific advice on filtering, shielding, and grounding to speed up your R&D process. Who is this for? Hardware R&D Engineers EMC Test Engineers Product Certification Specialists Download now and streamline your product certification process anytime, anywhere! 【專業 EMC 整改方案,您的隨身技術專家】 這是一款專為電子工程師與 EMC 專家打造的專業工具,旨在提升測試效率並即時解決電磁干擾問題。我們深知在受限的實驗室環境中,快速獲取技術資料的重要性。 主要特色: 100% 完全離線使用: 專為無訊號的屏蔽室與電波暗室設計。實驗室測試期間無需網路,即可隨時查閱所有 EMC 整改方案與技術文件。 全方位整改對策: 收錄傳導 (CE)、輻射 (RE)、靜電 (ESD)、雷擊 (Surge) 等各類電磁相容挑戰的成熟解決方案。 快速查找與診斷: 直覺化的分類界面助您快速定位問題。提供濾波、屏蔽與接地的具體操作建議,大幅加速研發進度。 適用對象: 電子研發工程師 EMC 測試工程師 產品認證專員 立即下載,隨時隨地簡化您的產品認證流程!
Screenshots
Verdict
The clearest difference is price: EMC Debug at Free against RPN's $2.99. EMC Debug also leads on update cadence (weekly vs every 4 months). RPN's advantage is ads (none vs shown) and chart position (#180 vs unranked). On in-app purchases, device support and iOS requirement 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
EMC Debug is free to download; RPN costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.
RPN ships an update every 4 months, EMC Debug weekly. The most recent releases landed on September 21, 2026 and September 17, 2026 respectively.
| Parameter | RPN | EMC Debug |
|---|---|---|
| Price | $2.99 | Free — better |
| Rating | 5.0 (8 ratings) — better | — |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 8 — better | — |
| Update frequency | Every 4 months | Weekly — better |
| Ads | No — better | Yes |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Best chart rank | #180 — better | — |
| Devices | iPhone, iPod | iPhone, iPad, iPod — better |
| Requires iOS | 12.0 — better | 13.0 |
| Further details — not scored | ||
| Size | 62 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | CuVee Software | CHEHUNG LIN |
In-app purchases
RPN
No in-app purchases
EMC Debug
No in-app purchases









