# SwiftRPN vs My Water

The clearest difference is update cadence: My Water at weekly against SwiftRPN's every 14 months. My Water also leads on iOS requirement (13.0 vs 17.6). On price, ads, in-app purchases and device support there is nothing between them.

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

SwiftRPN ships an update every 14 months, My Water weekly. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | SwiftRPN | My Water |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/swiftrpn/id6470951024/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 14 months | **Weekly** |
| Monetization | Free | — |
| Size | 3 MB | 55 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Patrick Gelvin](https://appshunter.io/developer/1573354051) | [Swallow Shuai Technology Development Co., Ltd.](https://appshunter.io/developer/1628485379) |

## 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


### My Water

[App page](https://appshunter.io/ios/app/my-water-daily-tracker/id6472012809)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is SwiftRPN free?

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

### Is My Water free?

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

### Do SwiftRPN or My Water have ads?

Neither SwiftRPN nor My Water shows ads.

### Which is updated more often, SwiftRPN or My Water?

SwiftRPN ships an update every 14 months, and My Water weekly. Most recently, SwiftRPN was updated on November 3, 2026 and My Water on November 8, 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.*