# SwiftRPN vs FrameFitCalculator

The clearest difference is update cadence: FrameFitCalculator at weekly against SwiftRPN's every 14 months. FrameFitCalculator also leads on iOS requirement (15.1 vs 17.6). On price, rating, ratings volume and ads there is nothing between them.

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

On the App Store both sit at effectively the same score — 5.0 for SwiftRPN against 5.0 for FrameFitCalculator. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

SwiftRPN ships an update every 14 months, FrameFitCalculator weekly. The most recent releases landed on October 30, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | SwiftRPN | FrameFitCalculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (1 ratings)](https://appshunter.io/ios/app/swiftrpn/id6470951024/reviews) | [5.0 (1 ratings)](https://appshunter.io/ios/app/framefitcalculator/id6748569280/reviews) |
| Number of ratings | 1 | 1 |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Weekly** |
| Monetization | Free | Free |
| Size | 3 MB | 24 MB |
| Requires iOS | 17.6 | **15.1** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Patrick Gelvin](https://appshunter.io/developer/1573354051) | [Micah Lavan](https://appshunter.io/developer/1826344158) |

## What reviewers say

### SwiftRPN

[App page](https://appshunter.io/ios/app/swiftrpn/id6470951024)

This utility app provides a powerful Reverse Polish Notation (RPN) calculator with advanced features. It supports scalar types, vectors, and matrices, along with extensive built-in operators and unit conversions. Easily switch between number bases and visualize results.

**Highlights:** RPN stack for efficient calculations, Support for scalar, vector, and matrix types, 84 built-in operators with documentation, 74 built-in units for conversion, Multiple number base input and output (binary, octal, decimal, hex), BigInt support for integer calculations

**In-app purchases:** none


### FrameFitCalculator

[App page](https://appshunter.io/ios/app/framefitcalculator/id6748569280)

This app simplifies custom frame and mat calculations for artists and DIY enthusiasts. It provides accurate dimensions for glass, mats, and frames, with flexible unit options and visual previews. Save time and money by avoiding errors and achieving professional results.

**Highlights:** Accurate frame and mat dimension calculations, Flexible unit switching (inches/centimeters), Smart framing style recommendations, Interactive visual preview of frame construction, Project saving and organization, User-friendly interface

**In-app purchases:** none


## Frequently asked questions

### Is SwiftRPN free?

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

### Is FrameFitCalculator free?

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

### Which has better reviews, SwiftRPN or FrameFitCalculator?

SwiftRPN and FrameFitCalculator are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.

### Do SwiftRPN or FrameFitCalculator have ads?

Neither SwiftRPN nor FrameFitCalculator shows ads.

### Which is updated more often, SwiftRPN or FrameFitCalculator?

SwiftRPN ships an update every 14 months, and FrameFitCalculator weekly. Most recently, SwiftRPN was updated on October 30, 2026 and FrameFitCalculator on October 24, 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.*