SwiftRPN vs My Water
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
SwiftRPN
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.
- 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
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SwiftRPN is an RPN (Reverse Polish Notation) calculator that aims to be quick to open and easy to use. = RPN Stack Work quickly and efficiently using the RPN Stack by pushing and popping values. The stack will always show what series of inputs led to each output, so you won't lose context during complicated expressions. = Extended Types SwiftRPN can understand scalar types like integers and real numbers, as well as vectors and square matrices of sizes 2, 3, and 4. When operating purely in the scalar integer domain, SwiftRPN can promote up to BigInts to avoid floating point imprecision. = Operators SwiftRPN has 84 built-in operators with included documentation and examples. All the expected operators (basic arithmetic, exponents, logarithms) are present, as are: - Rounding functions (floor/ceil/trunc/round) - Unit conversions - Bitwise operations (and/or/not/xor/shift left/shift right) - Statistics (avg/min/max/sum/std dev/NPV) - Trigonometry (sin/cos/tan + arc/hyperbolic variants) - Vector operations (dot/cross/normalize/length/swizzle) - Matrix operations (identity/inverse/transpose + translation/scale/rotation matrix generators) = Unit Conversions SwiftRPN has 74 built-in units, and can convert between units within families, including: - Angle - Area - Colors (3 and 4 components) - Coordinate systems (2D and 3D) - Length - Mass - Storage (Base 10 [SI, 1000 bytes in a kb] and Base 2 [1024 bytes in a kb]) - Temperature - Time - Volume = Value Representation SwiftRPN recognizes values represented in binary, octal, decimal, and hexidecimal. You can: - Enter values in one representation, and convert them to another - See the result of bitwise operations in binary automatically - View vec3 and vec4 components (truncated) in hexidecimal when working with colors.
My Water
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My Water is essential to our life . Drinking enough and the right quantity of water is vital for our health. My Water will help you to calculate how much water your body needs, will track your hydration and gently remind you to drink water to fulfill your goal. If you do not know how much you need to drink each day, no problem! Our app has a super water calculator to help you. Just enter your weight and My Water tells how much you should drink per day. You do not need to worry about remembering to drink water, just set the time you wake up, the time you go to bed and our app does the rest. It will send you notifications during the day to remind you the right time to drink. Discover statistics regarding your water consumption. Download it for free now and check it out. - Calculate how much water you should drink per day based on your weight - Schedule notifications according to the time you wake up and sleep - Track your historical consumption during the month and week - Simple, beautiful and intuitive Download now and see! Do you have questions or feedback? Feel free to contact us atwallsthased@gmail.com
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | SwiftRPN | My Water |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 14 months | Weekly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone, iPad | iPhone, iPod |
| Requires iOS | 17.6 | 13.0 — better |
| Further details — not scored | ||
| Size | 3 MB | 55 MB |
| Age rating | 4+ | 4+ |
| Developer | Patrick Gelvin | Swallow Shuai Technology Development Co., Ltd. |
In-app purchases
SwiftRPN
No in-app purchases
My Water
No in-app purchases









