Comparison

RPN Calculus vs Calculate Note

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

Head to head
About

RPN Calculus

This scientific calculator app for iPad offers a clean RPN interface with basic and advanced functions. It supports high precision calculations and provides an extensive, user-extendable database of scientific constants.

Highlights
  • RPN (Reverse Polish Notation) interface
  • Basic and advanced mathematical functions
  • High precision calculations (up to 15 digits)
  • Extensive scientific constant database
  • User-extendable constant database
  • Memory space for values
Read full description

RPN Calculus is a scientific RPN Calculator for the Apple iPad. RPN Calculus provides basic arithmetic operations as well as advanced mathematic operations like trigonometric, hyperbolic or logarithmic functions. The calculator app provides an unlimited, well, limited by system resources, amount of memory space for values. RPN Calculus performs calculations with a precision of up to 15 digits and supports a number range from -1E127 to 1E127. It's smallest presentable number is 1E-128. RPN Calculus offers a clean and simple layout, very common if you have used scientific RPN calculators before. RPN Calculus has a build in constant values database. The database contains over 120 scientific constants of different categories like e.g. Mathematics, Physics or Astronomy. Since the constants database is user extendable, you can add constant values that you are may be missing in the default set of constants. RPN Calculus can print out your values on the stack and the memory.

About

Calculate Note

This calculator app records all your calculations with customizable names and comments. Easily find past calculations and share your notes directly with others. It helps you keep track of your financial entries beyond just numbers.

Highlights
  • Records all calculations
  • Customizable calculation names
  • Add comments to calculations
  • Quickly find calculation notes
  • Share calculation notes
Features
Read full description

Calculate Note is more than just a calculator — it's your personal calculation notebook that automatically records every calculation you make. Never lose track of your numbers again. Whether you're splitting a restaurant bill, calculating shopping discounts, managing household expenses, or figuring out tips, every calculation is saved with a name and timestamp for easy reference. KEY FEATURES: • Automatic Calculation History — Every calculation is recorded automatically • Custom Names — Name each calculation (defaults to date) for easy identification • Quick Search — Find any past calculation instantly • Share Directly — Export and share calculation notes with friends and family • Tip Calculator — Built-in tip sharing for restaurants and group dining • Smart Notes — Add comments and notes to any calculation Perfect for everyday use: shopping lists, budget tracking, expense sharing, tip calculations, and more. Download now and transform the way you calculate!

Screenshots

Calculate Note4 screens

Verdict

The call

The clearest difference is review sentiment: RPN Calculus at 100% against Calculate Note's 0%. RPN Calculus also leads on rating (4.0 vs 1.0) and ads (none vs shown). Calculate Note's advantage is price (Free vs $1.99). On ratings volume, 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

Calculate Note is free to download; RPN Calculus costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

RPN Calculus holds the better App Store score, 4.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 1 respectively. Written reviews point the same way: 100% of RPN Calculus's written reviews are positive against 0% of Calculate Note's.

UpkeepUpdate frequency

RPN Calculus ships an update every 4 months, Calculate Note every 18 months. The most recent releases landed on October 14, 2026 and October 5, 2026 respectively.

Scorecard7 real differences · 3 level
RPN Calculus versus Calculate Note: the parameters behind the verdict, then further details
ParameterRPN CalculusCalculate Note
Price$1.99Free — better
Rating4.0 (1 ratings) — better1.0 (1 ratings)
Positive reviews100.0% of reviews — better0.0% of reviews
Number of ratings11
Update frequencyEvery 4 months — betterEvery 18 months
AdsNo — betterYes
In-app purchasesNoNo
MonetizationPaidAd-supported — better
DevicesiPadiPhone, iPad — better
Requires iOS12.0 — better17.6
Further details — not scored
Size11 MB5 MB
Age rating4+4+
DeveloperThomas BraunCHI HAO CHIU

Customer experience

RPN Calculus

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews3 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Calculate Note

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

In-app purchases

None

RPN Calculus

No in-app purchases

None

Calculate Note

No in-app purchases

Questions

Is RPN Calculus free?
RPN Calculus costs $1.99, with no in-app purchases.
Is Calculate Note free?
Calculate Note is free to download, with no in-app purchases.
Which has better reviews, RPN Calculus or Calculate Note?
RPN Calculus is rated higher. RPN Calculus averages 4.0 out of 5 from 1 ratings, while Calculate Note averages 1.0 from 1 ratings.
Do RPN Calculus or Calculate Note have ads?
Calculate Note shows ads; RPN Calculus does not.
Which is updated more often, RPN Calculus or Calculate Note?
RPN Calculus ships an update every 4 months, and Calculate Note every 18 months. Most recently, RPN Calculus was updated on October 14, 2026 and Calculate Note on October 5, 2026.

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