Comparison

InterSpec Radiation 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

InterSpec Radiation Analysis

Analyze nuclear radiation spectral data to identify nuclides, determine source activity, and calculate shielding. Supports various detector file formats and includes tools for dose rate calculations and nuclide decay information.

Highlights
  • Spectral nuclear radiation data analysis
  • Nuclide identification
  • Source activity determination
  • Shielding amount calculation
  • Spectral file format conversion
  • Dose rate calculations
  • Interactive nuclide decay information
Features
Read full description

InterSpec assists in analyzing spectral nuclear radiation data, using a peak-based methodology. Common uses include identifying nuclides present, determining source activity, shielding amounts, source age, or other nuclear reactions present. InterSpec also provides a number of other tools useful for analyzing radiation data including spectral file format converting, dose rate calculations, interactive nuclide decay and reference information, gamma cross section calculations and references, and more. InterSpec can open data files from most common spectral radiation detectors (e.g., most NaI, HPGe, LaBr, CLYC, CsI, etc. based systems) and assist in their analysis.

About

RPN

Features
Read full description

The basic four function calculator displays numbers in fixed format. The scientific calculator has 75 built-in functions covering logarithms, powers, roots, trigonometric, date, time, memory operations, statistics, and probabilities and up to four user defined macro functions. It displays numbers in user configurable fixed, scientific, or engineering formats. The user configurable calculator has sixteen user configurable function buttons that can each be assigned two functions from 75 built-in functions and access an unlimited number of user defined macro functions. It displays numbers in user configurable fixed, scientific, or engineering formats. The programmer’s calculator has a hexadecimal keypad and displays numbers in user configurable hexadecimal format. It has four basic mathematics, six bitwise, and two shift functions. All calculators share an operation history display for ease of reviewing computations and extensive in-app help documentation. Numbers can be copied to and pasted from the clipboard for ease of use with other applications.

Screenshots

InterSpec Radiation Analysis4 screens
RPN4 screens

Verdict

The call

The clearest difference is price: InterSpec Radiation Analysis at Free against RPN's $4.99. InterSpec Radiation Analysis also leads on iOS requirement (11.0 vs 16.6). 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

InterSpec Radiation Analysis is free to download; RPN costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

InterSpec Radiation Analysis ships an update every 11 months, RPN every 7 months. The most recent releases landed on October 24, 2026 and October 27, 2026 respectively.

Scorecard2 real differences · 8 level
InterSpec Radiation Analysis versus RPN: the parameters behind the verdict, then further details
ParameterInterSpec Radiation AnalysisRPN
PriceFree — better$4.99
Rating4.3 (12 ratings) — better—
Positive reviews100.0% of reviews—
Number of ratings12 — better—
Update frequencyEvery 11 monthsEvery 7 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, Mac
Requires iOS11.0 — better16.6
Further details — not scored
Size80 MB1 MB
Age rating4+4+
DeveloperWilliam JohnsonSteven Davies

In-app purchases

None

InterSpec Radiation Analysis

No in-app purchases

None

RPN

No in-app purchases

Questions

Is InterSpec Radiation Analysis free?
InterSpec Radiation Analysis is free to download, with no in-app purchases.
Is RPN free?
RPN costs $4.99, with no in-app purchases.
Do InterSpec Radiation Analysis or RPN have ads?
Neither InterSpec Radiation Analysis nor RPN shows ads.
Which is updated more often, InterSpec Radiation Analysis or RPN?
InterSpec Radiation Analysis ships an update every 11 months, and RPN every 7 months. Most recently, InterSpec Radiation Analysis was updated on October 24, 2026 and RPN on October 27, 2026.

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