# RPN vs Thetis Tools

The clearest difference is price: Thetis Tools at Free against RPN's $2.99. RPN's advantage is iOS requirement (12.0 vs 14.0). On update cadence, ads, in-app purchases and device support there is nothing between them.

Thetis Tools is free to download; RPN costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

RPN ships an update every 4 months, Thetis Tools every 7 months. The most recent releases landed on October 31, 2026 and October 26, 2026 respectively.

## The numbers

| Metric | RPN | Thetis Tools |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[5.0 (8 ratings)](https://appshunter.io/ios/app/rpn-65-sd/id1176059659/reviews)** | — |
| Number of ratings | **8** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 months** | Every 7 months |
| Monetization | Paid | — |
| Size | 62 MB | 50 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [CuVee Software](https://appshunter.io/developer/424873503) | [Thetis srl](https://appshunter.io/developer/397584184) |

## What reviewers say

### RPN

[App page](https://appshunter.io/ios/app/rpn-65-sd/id1176059659)

Experience a faithful simulation of the groundbreaking HP-65 programmable calculator on your iPhone. This app offers virtual program and data cards, a paper tape printer, and a robust card manager. Explore four distinct operating modes, including an enhanced "Super-65" option.

**Highlights:** Virtual program and data cards, Virtual paper tape printer with AirPrint, Database-driven card manager, Create, delete, and organize unlimited cards, Sharing via email, AirDrop, Dropbox, iTunes, Paste and run existing HP-65 listings, Four distinct operating modes

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Thetis Tools

[App page](https://appshunter.io/ios/app/thetis-tools/id1460268980)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RPN free?

RPN costs $2.99, with no in-app purchases.

### Is Thetis Tools free?

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

### Do RPN or Thetis Tools have ads?

Neither RPN nor Thetis Tools shows ads.

### Which is updated more often, RPN or Thetis Tools?

RPN ships an update every 4 months, and Thetis Tools every 7 months. Most recently, RPN was updated on October 31, 2026 and Thetis Tools on October 26, 2026.

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