Comparison

Calx vs CALC 1 Programmable Calculator

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

Head to head
About

Calx

This calculator app utilizes Reverse Polish Notation (RPN) for efficient calculations by manipulating numbers on a stack. It offers a guided tutorial, gestural interaction, multiple keypads with various functions, and customization options for fonts and colors.

Highlights
  • Reverse Polish Notation (RPN)
  • Gestural interaction
  • Multiple keypads (basic, scientific, statistical)
  • Customizable fonts and colors
  • Guided tutorial
Features
Read full description

CALX is an RPN calculator — a calculator designed to work with a list of numbers. This means that instead of just typing an equation into your calculator, you push numbers onto a stack, and then apply operations to the lowermost numbers in the stack. It's bizarre, but it makes sense once it clicks. If this all sounds confusing, don't worry! CALX comes with a guided tutorial which will get you up to speed in three minutes. Features: • Gestural interaction: Manipulate your data with simple, intuitive gestures. • Multiple keypads: CALX features an array of basic, scientific, and statistical functions. • Customization: Select from different fonts and colours to find a combination that works for you.

About

CALC 1 Programmable Calculator

Create custom calculators with AI-generated JavaScript functions for precise calculations and data visualization. Assign programs to keys and manage data efficiently. Offers multiple calculation modes and extensive documentation.

Highlights
  • AI-assisted JavaScript function creation
  • Customizable function calculators
  • Data visualization and plotting
  • Programmable calculator keys
  • List and data management
  • Multiple calculation modes (algebraic, RPN)
Features
Read full description

Customize your calculators for quick and accurate calculations with CALC 1 - the ultimate programmable calculator for your iPhone or iPad. * Harness the power of AI: Ask your favorite AI tool to create JavaScript functions for you * Effortlessly create Function Calculators: Simply copy the AI-generated function code to your clipboard and tap the add button in the "Function Calculators" list - CALC 1 will automatically create a new Function Calculator (Always test the Function Calculator to verify the function is as you intended) * Execute functions with ease: Key in the parameter values to run the function and get instant results * Perform breakeven analysis: Function Calculators can solve for any non-integer parameter * Visualize data effortlessly: Create plots as a function of any parameter by entering the min and max values * Assign programs to individual calculator keys for personalized functionality * Create custom calculators by copying and pasting keys from pre-built calculators * Automatically generate keys from entered expressions for effortless reuse * CALC 1 has over 100 built-in functions that you can use from your JavaScript code * Manage lists and data with the List Manager and Data Manager for quick and accurate importing * Choose between algebraic, chain, or RPN calculation modes with an automatic stack * Access the CALC 1 documentation site with over 100 pages of searchable content and video tutorials, easily accessible through help links (?) within the app Whether you're a student, professional, or simply someone who appreciates the power of customization and AI-assisted productivity, CALC 1 offers a consistent and efficient solution to a wide range of problems. Upgrade your calculation experience with CALC 1 today!

Screenshots

Calx3 screens
CALC 1 Programmable Calculator4 screens

Verdict

The call

The clearest difference is price: Calx at $0.99 against CALC 1 Programmable Calculator's $9.99. Calx also leads on rating (5.0 vs 4.6) and iOS requirement (12.0 vs 16.1). CALC 1 Programmable Calculator's advantage is update cadence (every 5 weeks vs every 24 months) and ratings volume (9 vs 2). On review sentiment, ads, in-app purchases and monetization model 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

Calx costs $0.99 and CALC 1 Programmable Calculator $9.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Calx holds the better App Store score, 5.0 against 4.6. Both are backed by a comparable volume of ratings — 2 and 9 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Calx ships an update every 24 months, CALC 1 Programmable Calculator every 5 weeks. The most recent releases landed on August 12, 2026 and September 9, 2026 respectively.

Scorecard5 real differences · 5 level
Calx versus CALC 1 Programmable Calculator: the parameters behind the verdict, then further details
ParameterCalxCALC 1 Programmable Calculator
Price$0.99 — better$9.99
Rating5.0 (2 ratings) — better4.6 (9 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings29 — better
Update frequencyEvery 24 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPodiPhone, iPad
Requires iOS12.0 — better16.1
Further details — not scored
Size4 MB8 MB
Age rating4+4+
DeveloperDaniel ClellandCalcFxC, LLC

Customer experience

Calx

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

CALC 1 Programmable Calculator

All ratings9 ratings
Positive88.9%
Neutral0.0%
Negative11.1%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Calx

No in-app purchases

None

CALC 1 Programmable Calculator

No in-app purchases

Questions

Is Calx free?
Calx costs $0.99, with no in-app purchases.
Is CALC 1 Programmable Calculator free?
CALC 1 Programmable Calculator costs $9.99, with no in-app purchases.
Which has better reviews, Calx or CALC 1 Programmable Calculator?
Calx is rated higher. Calx averages 5.0 out of 5 from 2 ratings, while CALC 1 Programmable Calculator averages 4.6 from 9 ratings.
Do Calx or CALC 1 Programmable Calculator have ads?
Neither Calx nor CALC 1 Programmable Calculator shows ads.
Which is updated more often, Calx or CALC 1 Programmable Calculator?
Calx ships an update every 24 months, and CALC 1 Programmable Calculator every 5 weeks. Most recently, Calx was updated on August 12, 2026 and CALC 1 Programmable Calculator on September 9, 2026.

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