Comparison

Power Analysis vs RPN

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

Head to head
About

Power Analysis

Design experiments and analyze data with confidence, even without extensive statistical knowledge. This app guides you through planning studies, determining necessary sample sizes, and understanding measurement quality. It supports various distribution types and automatically selects appropriate statistical tests.

Highlights
  • Guided experiment design
  • Sample size determination
  • Measurement quality assessment
  • Support for various distributions
  • Automatic statistical test selection
  • Interactive parameter adjustment
Features
Read full description

Design experiments and measurements confidently with minimal knowledge of statistics. Have you ever worried if the study you were planning would have enough data to conclude anything? Know how much data you need while you're still in the planning phase. Let the app do the statistics for you. • Easy to use interface helps you enter the pertinent information without being a statistics expert. • Know how many observations you'll need to measure what you want. • Know how good a measurement you'll get for any number of observations you set. • Visualizations • Play with sliders for key parameters and see how they affect the measurement • Supports measurements of rates and proportions (binomial distributions) in addition to continuous distributions • Chooses appropriate statistical test for you based on your experimental parameters. (Tests include t, z, chi square, and exact binomial). • Set your preferred risk of both false positives and false negatives (type I error and type II error) Can also be useful as an interactive study tool for learning about the statistics of measurement

About

RPN

This app simulates a legendary scientific calculator, offering photo-realistic visuals and advanced functions like integration and root finding. It includes built-in programs and extensions for enhanced usability, making it a powerful tool for complex calculations.

Highlights
  • Photo-realistic look-and-feel
  • Programmable with 999 steps
  • Integration and root solving
  • Built-in application programs
  • Live register view
  • Program library and backup
  • Sharing via email, AirDrop, Dropbox
Features
Read full description

RPN-34 CE is the first photo-realistic simulation of Hewlett-Packard's popular mid-range scientific calculator HP-34C for the iPhone. Produced from 1979 through 1983, it was the "Basil" member of the third-generation HP calculators known as the "Spice" series. It was the first pocket-calculator ever capable of doing integration and root finding. While the simulator works like the original calculator, a number of carefully designed extensions, along with the tremendously improved speed, make it joy to use even today. RPN-34 CE comes with the programs of HP's "Applications", "Mathematics", "Surveying", "Student Engineering", and "Statistics" application books built-in! Handbooks may be downloaded from CuVee Software's website. Features: • Photo-realistic look-and-feel • Programmable (999 steps), subroutines, 12 labels, 10 flags • 100 registers, "continuous", with full store/recall arithmetic • "Live" register view • Program listing view with intelligent navigation • Program library, easily backed-up via iTunes • Store and retrieve any number of programs • Sharing: e-mail, AirDrop, Dropbox, copy, paste, print • 62 programs pre-installed (53 original HP) Calculator functions: • Integration, root solving • Statistics (mean, standard deviation, linear regression, normal distribution) • Factorial of any number (normal and logarithmic) • Trigonometric and hyperbolic functions (degrees, radians, grads) • Polar/rectangular conversions • Inverse, square root, logarithm, exponential, pi • Storage arithmetic (both store and recall) • Statistics (average, standard deviation, y-estimate, linear regression) • Unit and hours conversions • 31 additional functions not found on the HP-34C, like time and sound Details: cuveesoft.ch/rpn34

Screenshots

Power Analysis4 screens
RPN4 screens

Verdict

The call

Power Analysis and RPN both sit at 5.0 stars, but that hides the real split: 100% of RPN's written reviews are positive against 50% of Power Analysis's. RPN also leads on price ($1.99 vs $4.99) and ratings volume (14 vs 3). Power Analysis's advantage is iOS requirement (9.0 vs 12.0). On rating, update cadence, ads and in-app purchases 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

Power Analysis costs $4.99 and RPN $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Power Analysis against 5.0 for RPN. Both are backed by a comparable volume of ratings — 3 and 14 respectively. Written reviews are what separate them: 50% of Power Analysis's written reviews are positive against 100% of RPN's.

UpkeepUpdate frequency

Power Analysis ships an update every 4 months, RPN every 3 months. The most recent releases landed on October 9, 2026 and October 20, 2026 respectively.

Scorecard4 real differences · 6 level
Power Analysis versus RPN: the parameters behind the verdict, then further details
ParameterPower AnalysisRPN
Price$4.99$1.99 — better
Rating5.0 (3 ratings)5.0 (14 ratings)
Positive reviews50.0% of reviews100.0% of reviews — better
Number of ratings314 — better
Update frequencyEvery 4 monthsEvery 3 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS9.0 — better12.0
Further details — not scored
Size3 MB16 MB
Age rating4+4+
DeveloperA&X Analytics, LLCCuVee Software

Customer experience

Power Analysis

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews8 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

RPN

All ratings14 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Power Analysis

No in-app purchases

None

RPN

No in-app purchases

Questions

Is Power Analysis free?
Power Analysis costs $4.99, with no in-app purchases.
Is RPN free?
RPN costs $1.99, with no in-app purchases.
Which has better reviews, Power Analysis or RPN?
Power Analysis and RPN are both rated 5.0 out of 5 on the App Store, from 3 and 14 ratings respectively.
Do Power Analysis or RPN have ads?
Neither Power Analysis nor RPN shows ads.
Which is updated more often, Power Analysis or RPN?
Power Analysis ships an update every 4 months, and RPN every 3 months. Most recently, Power Analysis was updated on October 9, 2026 and RPN on October 20, 2026.

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