# RPN vs CalCollections

The clearest difference is price: CalCollections at Free against RPN's $4.99. CalCollections also leads on update cadence (every 4 weeks vs every 3 months). RPN's advantage is iOS requirement (12.0 vs 18.4). On ads, in-app purchases and device support there is nothing between them.

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

RPN ships an update every 3 months, CalCollections every 4 weeks. The most recent releases landed on November 1, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | RPN | CalCollections |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[4.9 (11 ratings)](https://appshunter.io/ios/app/rpn-97-pro/id816249055/reviews)** | — |
| Number of ratings | **11** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 4 weeks** |
| Monetization | Paid | — |
| Size | 75 MB | 2 MB |
| Requires iOS | **12.0** | 18.4 |
| Devices | iPad | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [CuVee Software](https://appshunter.io/developer/424873503) | [The Calculator Store SLNE](https://appshunter.io/developer/1801462449) |

## What reviewers say

### RPN

[App page](https://appshunter.io/ios/app/rpn-97-pro/id816249055)

This app simulates a legendary 1970s programmable calculator, offering advanced features for scientists and engineers. It allows users to run programs, manage virtual cards, and access hundreds of free program cards from its website.

**Highlights:** Virtual program and data cards, Virtual paper tape printer, Database-driven card manager, Create, label, and organize unlimited cards, Effortless saving of card collections, Formatted program listings, Live display of stack and registers

**Features:** macOS Compatibility

**In-app purchases:** none


### CalCollections

[App page](https://appshunter.io/ios/app/calcollections/id6746972417)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RPN free?

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

### Is CalCollections free?

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

### Do RPN or CalCollections have ads?

Neither RPN nor CalCollections shows ads.

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

RPN ships an update every 3 months, and CalCollections every 4 weeks. Most recently, RPN was updated on November 1, 2026 and CalCollections on October 30, 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.*