Uno Calculator vs Stack RPN Calculator
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Uno Calculator
This app offers a comprehensive suite of calculation tools, handling everything from basic arithmetic to complex unit conversions. It supports measurements for size, temperature, speed, energy, and currency, making it a versatile solution for diverse needs.
- Arithmetic calculations
- Unit conversions
- Size measurements
- Temperature conversions
- Speed calculations
- Energy calculations
- Currency exchange
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The powerful Uno Calculator receives a makeover from Uno Platform with a wide variety of features. From calculations to measurements of size, temperature, speed, energy, currency and more, the calculator is a powerful one-stop-shop for all calculation-related needs.
Stack RPN Calculator
This scientific calculator displays major functions on screen and utilizes a stack for calculations. It supports a stack of up to 4 values but can store many more numbers depending on device memory.
- Visible scientific functions
- RPN (Reverse Polish Notation) input
- Stack display for up to 4 values
- Large number storage capacity
- Designed for iPhone and iPad
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RPN scientific calculator benefiting from the major scientific functions visible on the screen. The calculator shows a stack of up to 4 values but can store a large number of numbers (depends on the phone's memory).
Screenshots
Verdict
The clearest difference is rating: Uno Calculator at 4.6 against Stack RPN Calculator's 3.5. Uno Calculator also leads on review sentiment (73% vs 33%) and ratings volume (113 vs 2). Stack RPN Calculator's advantage is iOS requirement (11.0 vs 14.2). On price, ads, in-app purchases and monetization model 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.
Uno Calculator holds the better App Store score, 4.6 against 3.5. That said, the two scores are not equally well evidenced: Uno Calculator has 113 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 73% of Uno Calculator's written reviews are positive against 33% of Stack RPN Calculator's.
| Parameter | Uno Calculator | Stack RPN Calculator |
|---|---|---|
| Price | Free | Free |
| Rating | 4.6 (113 ratings) — better | 3.5 (2 ratings) |
| Positive reviews | 73.2% of reviews — better | 33.3% of reviews |
| Number of ratings | 113 — better | 2 |
| Update frequency | Every 5 months | — |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 14.2 | 11.0 — better |
| Further details — not scored | ||
| Size | 96 MB | 10 MB |
| Age rating | 4+ | 4+ |
| Developer | Uno Platform Inc. | Dario Bersiga |
Customer experience
Uno Calculator
Stack RPN Calculator
Bugs and requests
Uno Calculator
Reported bugs
10 issues- Standard calculator mode doesn't follow order of operations (1+2*3 = 9 instead of 7)
- Buttons disappear while using on iPad
- Apple Pencil input causes buttons to blend into background
- Slow key responsiveness on macOS
- Numeric keypad input not recognized from Apple keyboard
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- History not persisting after app closure
- Text rendering issues on larger iPad displays
- Unit conversion errors (volume translated incorrectly in Chinese)
- Slow data entry on macOS Catalina
- Landscape mode layout issues
Requested features
11 requests- Keyboard input support for Mac and iPad (most requested)
- Copy and paste functionality for results and formulas
- Option to reposition calculator buttons to right side
- Ability to hide or collapse history pane
- Persistent history that saves after app closes
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- Sound/click feedback option in settings
- Donation option within the app
- Improved dark mode styling
- Bluetooth keyboard support
- Numeric keypad support for external keyboards
- Currency conversion feature restoration
Stack RPN Calculator
Not enough reviews yet to summarise bugs or requests.
In-app purchases
Uno Calculator
No in-app purchases
Stack RPN Calculator
No in-app purchases
Questions
Is Uno Calculator free?
Is Stack RPN Calculator free?
Which has better reviews, Uno Calculator or Stack RPN Calculator?
Do Uno Calculator or Stack RPN Calculator have ads?
Other comparisons
