# RPN-65 SD — user reviews

> 3 indexed App Store user reviews of RPN by CuVee Software, rated 5.00/5 from 8 ratings.

- Source: https://appshunter.io/ios/app/rpn-65-sd/id1176059659/reviews
- App overview in markdown: https://appshunter.io/ios/app/rpn-65-sd/id1176059659.md
- Rating breakdown: 5★ 8 · 4★ 0 · 3★ 0 · 2★ 0 · 1★ 0

## Most critical reviews (3 lowest-rated)

### 5/5 — Top!!

*2024-03-21*

Klasse Software, sehr aufwendig und ausgeklügelt. Alles wird gut erklärt, toll!!

### 5/5 — Lovely, useful—now with haptic key clicks!

*2022-12-03*

It seems just a few weeks ago I asked for haptic key click and now here it is! This is a nifty reminder of the satisfying “thunk” of the famously high quality keys of these classic physical calculators.

### 5/5 — My go-to calculator

*2019-01-10*

I’ve always been an HP calculator fan. My first calculator was a National Semiconductor RPN scientific. But I couldn’t afford the HP’s when I was in school. 

Now that I have an iPhone in my pocket every day, I don’t have as much need for a separate physical calculator. I’ve tried an HP-41c emulator that was somewhat disappointing. Andy Ihnatko recommended this one, so I gave it a shot. Graphically perfect. Keys are extremely responsive. The program card animation makes me smile. 

I somehow hit a button that put me in a weird mode. I couldn’t get out of it, so I emailed the developer. He got back to me within a day and helped me reverse my stupidity. 

I can’t recommend this one highly enough.

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-26.*