Comparison

i41CX vs HourTracker

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

HourTracker

Track your work hours across multiple employers with detailed entries for holidays, events, and off-duty time. Generate customizable HTML or PDF reports and manage invoices for contractors. Supports iCloud backup and photo attachments.

Highlights
  • Multiple employer support
  • Holiday and event entries
  • Off-duty time tracking
  • Automatic report generation (HTML/PDF)
  • Invoice add-on for contractors
  • iCloud backup and restore
  • Photo attachments for reports
Features
Read full description

HourTracker is a focused time-tracking app for people who work for one employer or many. Log your hours in seconds, keep every employer separate, and turn your work into clean reports — or full invoices — without the clutter. WORK TIME, YOUR WAY (free) • Track multiple employers and switch between them with a tap • Days hold timed events (start–end), duration entries, breaks, day notes and holidays • Custom event categories (e.g. Work, Travel, Training), each with its own rate • Choose your rounding: 1, 5, 10, 15, 30 or 45-minute steps • Insert your current city into an event with one tap (with custom shorthands, e.g. Helsinki → Hki) SEE YOUR PROGRESS (free) • A whole year of activity at a glance (heatmap) • Hours goals with weekly, biweekly or monthly progress • Charts and statistics for your hours and earnings • "Year in Review" annual recap, exportable as a PDF REPORTS THAT LOOK THE PART • Polished HTML or PDF reports, with pagination and photo attachments • Add your own summaries for overtime and other special hours • Send straight from the app INVOICING & BUSINESS (optional in-app purchase) For contractors and the self-employed: • Create, archive and track invoices, drafts, credit notes and payment reminders • Finnish payment slips with SEPA QR and barcode, plus Finvoice 3.0 e-invoicing • Recurring invoices and expenses, expense tracking and a finance overview • Payslips with annual summary and holiday bonus • Client and supplier registers, client statements and a price/product library EVERYWHERE YOU WORK • iPhone, iPad (optimized) and Mac • Home-screen widgets, plus an Apple Watch app to start and stop timers from your wrist • iCloud keeps your data up to date across all your devices • Encrypted backup & restore, plus import from the previous HourTracker PRIVATE BY DESIGN Your data stays in your own iCloud. An optional Face ID / passcode lock keeps the app private. SPEAKS YOUR LANGUAGE Full English and Finnish interface. Need reports or invoices in another language? The built-in translation editor lets you translate documents into virtually any language that uses standard characters. HourTracker keeps the simple things simple — and gives professionals everything they need when the job grows. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

i41CX4 screens
HourTracker4 screens

Verdict

The call

The clearest difference is review sentiment: i41CX at 90% against HourTracker's 0%. i41CX also leads on ratings volume (45 vs 1) and iOS requirement (16.0 vs 26.0). HourTracker's advantage is rating (5.0 vs 4.6) and price ($6.99 vs $7.99). On update cadence, ads, in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

i41CX costs $7.99 and HourTracker $6.99 up front. i41CX sells 4 one-off in-app purchases and HourTracker sells 10 in-app purchases, starting at $17.99 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

HourTracker holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: i41CX has 45 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 90% of i41CX's written reviews are positive against 0% of HourTracker's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

i41CX ships an update weekly, HourTracker every 5 days. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard6 real differences · 4 level
i41CX versus HourTracker: the parameters behind the verdict, then further details
Parameteri41CXHourTracker
Price$7.99$6.99 — better
Rating4.6 (45 ratings)5.0 (1 ratings) — better
Positive reviews90.5% of reviews — better0.0% of reviews
Number of ratings45 — better1
Update frequencyWeeklyEvery 5 days — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPadiPhone, iPad, Apple Watch — better
Requires iOS16.0 — better26.0
Further details — not scored
Size135 MB20 MB
Age rating4+4+
DeveloperAntonio LaganaOskari Rauta

Customer experience

i41CX

All ratings45 ratings
Positive91.1%
Neutral2.2%
Negative6.7%
Written reviews126 reviews
Positive90.5%
Neutral3.2%
Negative6.3%

HourTracker

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive0.0%
Neutral100.0%
Negative0.0%

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
10 purchases

HourTracker

Subscriptions8
  • Invoices (1 month)$17.991 Month
  • Business (1 month)$29.991 Month
  • Invoices (3 months)$44.993 Months
Show 5 more
  • Business (3 months)$49.993 Months
  • Invoices (6 months)$69.996 Months
  • Business (6 months)$89.996 Months
  • Invoices (1 year)$89.991 Year
  • Business (1 year)$129.991 Year
One-time2
  • 26 weeks$59.99
  • 52 weeks$99.99

Questions

Is i41CX free?
i41CX costs $7.99, and also offers in-app purchases.
Is HourTracker free?
HourTracker costs $6.99, and also offers in-app purchases.
Which has better reviews, i41CX or HourTracker?
HourTracker is rated higher. i41CX averages 4.6 out of 5 from 45 ratings, while HourTracker averages 5.0 from 1 ratings.
Do i41CX or HourTracker have ads?
Neither i41CX nor HourTracker shows ads.
Which is updated more often, i41CX or HourTracker?
i41CX ships an update weekly, and HourTracker every 5 days. Most recently, i41CX was updated on October 26, 2026 and HourTracker on October 24, 2026.

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