# RPN vs Calc

The clearest difference is price: Calc at Free against RPN's $4.99. Calc also leads on rating (5.0 vs 4.3) and update cadence (every 9 days vs every 3 months). RPN's advantage is ratings volume (6 vs 2) and iOS requirement (12.0 vs 18.0). On ads, in-app purchases and device support there is nothing between them.

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

Calc holds the better App Store score, 5.0 against 4.3. Both are backed by a comparable volume of ratings — 6 and 2 respectively. Written reviews point the same way: 90% of RPN's written reviews are positive against 100% of Calc's.

RPN ships an update every 3 months, Calc every 9 days. The most recent releases landed on November 4, 2026 and November 9, 2026 respectively.

## The numbers

| Metric | RPN | Calc |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | [4.3 (6 ratings)](https://appshunter.io/ios/app/rpn-67-pro/id603103972/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/calc-u-59/id6761413142/reviews)** |
| Number of ratings | **6** | 2 |
| Positive reviews | 90.0% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 9 days** |
| Monetization | Paid | **Free** |
| Size | 78 MB | 9 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [CuVee Software](https://appshunter.io/developer/424873503) | [Martin Erzberger](https://appshunter.io/developer/1889469770) |

## What reviewers say

### RPN

[App page](https://appshunter.io/ios/app/rpn-67-pro/id603103972)

This app is a faithful simulation of a legendary 1970s programmable calculator, offering advanced features for scientists and engineers. It allows users to run existing programs, manage virtual program cards, and even print listings, all on their iPad.

**Highlights:** Virtual program and data cards, Virtual paper tape printer, Database-driven card manager, Save card collections to Mac/PC, Formatted program listings, Print listings via AirPrint, Live display of stack and registers

**Features:** macOS Compatibility

**In-app purchases:** none


### Calc

[App page](https://appshunter.io/ios/app/calc-u-59/id6761413142)

This app emulates the classic TI-59, TI-58, and TI-58C calculators with cycle-accurate precision. It includes features like a virtual magnetic card reader, a PC-100C printer, and a CPU-level debugger for in-depth analysis. Explore old programs or learn how these vintage machines operated.

**Highlights:** Cycle-accurate TI-59, TI-58, TI-58C emulation, Virtual magnetic card reader, PC-100C printer emulation, CPU-level debugger, Solid State Software module support, State file loading (.ti59, .ti58c)

**Features:** iPhone Duo support

**In-app purchases:** none


## Frequently asked questions

### Is RPN free?

RPN costs $4.99, with no in-app purchases.

### Is Calc free?

Calc is free to download, with no in-app purchases.

### Which has better reviews, RPN or Calc?

Calc is rated higher. RPN averages 4.3 out of 5 from 6 ratings, while Calc averages 5.0 from 2 ratings.

### Do RPN or Calc have ads?

Neither RPN nor Calc shows ads.

### Which is updated more often, RPN or Calc?

RPN ships an update every 3 months, and Calc every 9 days. Most recently, RPN was updated on November 4, 2026 and Calc on November 9, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*