Comparison

RPN vs EV Battery Analysis

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

Head to head
About

RPN

This app provides a photo-realistic simulation of a rare 1974 financial calculator, offering full functionality for loan amortization, saving plans, and depreciation. It features an authentic design with animated keys and an optional live register view.

Highlights
  • Photo-realistic design
  • Live register view
  • Animated keys with sound
  • Full HP-70 function implementation
  • Cut/copy/paste display value
  • Built-in manual with examples
Features
Read full description

RPN-70 HD is a complete, photo-realistic simulation of the financial hand-held calculator HP-70 from 1974. It handles loan amortization, saving plans, depreciation, and much more with ease. What users said: "Hard to find a decent calculator on iPad, try this one." "I don't normally write reviews but RPN-70 is just too fantastic to not get excited about. Apple should list this app under their Education category in the App Store and make it a must have for every college bound student. It is the best HP emulator in the market." "An incredibly well-engineered calculator app, and free, to boot!" "This is a really cool Financial calculator. Just like using the original HP-70. Accurate to the penny." Features: • Photo-realistic look based on an existing device • "Live" register view in landscape mode • Animated keys with click sound (adjustable volume) • All functions and operations of the HP-70 fully implemented • Simulation of the HP-70's computation time (optional) • Correct wrong number entries by swiping left across the display • Cut/copy/paste of display value • Visual indicators keep track of stored input parameters (optional) • Stack shown right below display (optional) • 10 non-volatile memory registers (optional) • Built-in short manual with many examples The HP-70 was discontinued after just one year. It is one of the rarest calculators, hard to find in any condition. NOTE: RPN-70 HD is a faithful simulation of a vintage HP-70 calculator, as has been verified against a real device using the examples in the Applications Cookbook section of the HP-70 manual. In certain cases, what may appear like a bug of the app is actually an idiosyncrasy of the HP-70. IMPORTANT: The HP-70 requires exactly three input parameters from the top-row keys, at least one of them being either "n" or "i". In other words, you can't use PMT, PV, and FV as input parameters simultaneously. A version for the iPhone named "RPN-70 SD" is also available. Visit the website: www.cuveesoft.ch

About

EV Battery Analysis

Features
Read full description

How healthy is your EV battery? How much range will you lose in 5 years? This app simulates your Battery State of Health (SOH) based on academic literature and real-world engineering data. No OBD device required. Key Features: NMC vs LFP Engines: Specific algorithms for your battery chemistry. Heat Pump & Climate: Analyzes the impact of weather and thermal management. Fast Charging (DC): See how your charging habits affect battery life. Future Projection: Forecast your battery health for the next 10 years. 20-80% Rule: Discover how charging habits extend battery lifespan. Suitable for Tesla, BYD, VW, Hyundai, and all electric vehicles. Download now to master your EV battery!

Screenshots

EV Battery Analysis4 screens

Verdict

The call

The clearest difference is ads: RPN at none against EV Battery Analysis's shown. RPN also leads on iOS requirement (12.0 vs 15.6). EV Battery Analysis's advantage is update cadence (every 3 days vs every 9 months) and device support (3 vs 1). On price 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

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

RPN ships an update every 9 months, EV Battery Analysis every 3 days. The most recent releases landed on October 21, 2026 and October 25, 2026 respectively.

Scorecard4 real differences · 6 level
RPN versus EV Battery Analysis: the parameters behind the verdict, then further details
ParameterRPNEV Battery Analysis
PriceFreeFree
Rating5.0 (3 ratings) — better—
Positive reviews83.3% of reviews—
Number of ratings3 — better—
Update frequencyEvery 9 monthsEvery 3 days — better
AdsNo — betterYes
In-app purchasesNoNo
MonetizationFree—
DevicesiPadiPhone, iPad, iPod — better
Requires iOS12.0 — better15.6
Further details — not scored
Size14 MB27 MB
Age rating4+4+
DeveloperCuVee SoftwareMelih OZUDOGRU

In-app purchases

None

RPN

No in-app purchases

None

EV Battery Analysis

No in-app purchases

Questions

Is RPN free?
RPN is free to download, with no in-app purchases.
Is EV Battery Analysis free?
EV Battery Analysis is free to download, with no in-app purchases.
Do RPN or EV Battery Analysis have ads?
EV Battery Analysis shows ads; RPN does not.
Which is updated more often, RPN or EV Battery Analysis?
RPN ships an update every 9 months, and EV Battery Analysis every 3 days. Most recently, RPN was updated on October 21, 2026 and EV Battery Analysis on October 25, 2026.

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