i41CX vs Poly Connect
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
i41CX
This app offers a powerful RPN scientific calculator experience, functionally equivalent to a renowned model. It provides extensive memory registers, over 300 built-in functions, and programmability. Advanced features can be unlocked via in-app purchases.
- RPN logic with 4-element stack
- 319 main and 124 extended memory registers
- Over 300 built-in functions
- Programmable up to 2000 lines
- User-definable keyboard
- Bluetooth keyboard support
- Device integration features
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i41CX is the same powerful advanced programmable RPN scientific calculator as the highly acclaimed i41CX+ but without the latter’s incredibly advanced capabilities such as the printer, expansion, CAS, etc. It is functionally equivalent to the world-renowned HP-41CX and inherits all of the i41CX+ usability features including extremely responsive and animated key clicks, audible key feedback sounds, optimally spaced keys for accurate input, traditional and upbeat modern diverse set of skins, etc. If you are looking for a powerful programmable RPN scientific calculator but don’t need all of the capabilities of i41CX+ then i41CX is for you. And best of all, if you ever decide that you need the more advanced capabilities of i41CX+ you can enable them using secure in-app purchases right within the app! FEATURES: • RPN logic with a 4 element deep memory stack • 319 main and 124 extended memory registers • Over 300 built-in functions, including nearly 100 functions created specifically for i41CX • Time, calendar, alarm, and stopwatch functions • Rich set of functions and algorithms: numerical, mathematical, statistical, and much more • Access to the entire HP-41 library of solutions for science, mathematics, statistics, engineering, business, financial, surveying, medicine, real estate, and many other domains • Programmable - Over 2000 lines • User definable keyboard • Ability to operate the calculator using a Bluetooth keyboard • Device integration: external display mirroring, copy and paste, GPS, accelerometer, digital compass, time and date synchronization, and much more • iOS 8 Notification Center widget • Sound support including synthetic tones and interface sounds • Support for calculator skins and optional mini stack display • Adjustable sound volume and display colors • Usage & Examples table with usage tips and examples • Quick reference guide of all built-in functions • Beautiful and clean user interface *********************************************************** A comprehensive FAQ is available at http://alsoftiphone.com/i41CX. Please don't hesitate to use the "Contact Us" link there if you cannot find the answers or information that you seek. Thank you.
Poly Connect
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Key Features : - Date Wise Event and Meeting Details on Dashboard - All Event Information, Event Location , Event Images, Venue Location on Event Page - Daily, Weekly & Monthly Calender View for Events - Event Reminder Notification - Event Wise Poll Notification - All Meeting Information, Meeting Location , Meeting Images, Venue Location on Meeting Detail Page - Daily, Weekly & Monthly Calendar View for Meeting - Meeting Reminder Notification
Screenshots
Verdict
The clearest difference is price: Poly Connect at Free against i41CX's $7.99. Poly Connect also leads on in-app purchases (none vs 4) and update cadence (every 2 days vs every 5 weeks). On ads, 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
Poly Connect is free to download; i41CX costs $7.99 up front. i41CX sells 4 one-off in-app purchases. Poly Connect asks for nothing beyond the download.
i41CX ships an update every 5 weeks, Poly Connect every 2 days. The most recent releases landed on September 21, 2026 and March 26, 2026 respectively.
| Parameter | i41CX | Poly Connect |
|---|---|---|
| Price | $7.99 | Free — better |
| Rating | 4.6 (45 ratings) — better | — |
| Positive reviews | 90.5% of reviews | — |
| Number of ratings | 45 — better | — |
| Update frequency | Every 5 weeks | Every 2 days — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 13.0 | 12.4 — better |
| Further details — not scored | ||
| Size | 134 MB | 27 MB |
| Age rating | +4 | 4+ |
| Developer | Antonio Lagana | Instance IT Solutions |
In-app purchases
i41CX
- Overlays Upgrade$2.99
- Printer Upgrade$3.99
- CAS Upgrade$7.99
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- i41CX+ Features Upgrade$17.99
Poly Connect
No in-app purchases








