Comparison

i41CX vs Poly Connect

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

Head to head
About

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.

Highlights
  • 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
Read full description

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.

About

Poly Connect

Features
Read full description

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

i41CX4 screens
Poly Connect4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

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.

UpkeepUpdate frequency

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.

Scorecard3 real differences · 7 level
i41CX versus Poly Connect: the parameters behind the verdict, then further details
Parameteri41CXPoly Connect
Price$7.99Free — better
Rating4.6 (45 ratings) — better—
Positive reviews90.5% of reviews—
Number of ratings45 — better—
Update frequencyEvery 5 weeksEvery 2 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.012.4 — better
Further details — not scored
Size134 MB27 MB
Age rating+44+
DeveloperAntonio LaganaInstance IT Solutions

In-app purchases

4 purchases

i41CX

One-time4
  • Overlays Upgrade$2.99
  • Printer Upgrade$3.99
  • CAS Upgrade$7.99
Show 1 more
  • i41CX+ Features Upgrade$17.99
None

Poly Connect

No in-app purchases

Questions

Is i41CX free?
i41CX costs $7.99, and also offers in-app purchases.
Is Poly Connect free?
Poly Connect is free to download, with no in-app purchases.
Do i41CX or Poly Connect have ads?
Neither i41CX nor Poly Connect shows ads.
Which is updated more often, i41CX or Poly Connect?
i41CX ships an update every 5 weeks, and Poly Connect every 2 days. Most recently, i41CX was updated on September 21, 2026 and Poly Connect on March 26, 2026.

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