# All in One Calculator vs Stack RPN Calculator

The clearest difference is review sentiment: All in One Calculator at 85% against Stack RPN Calculator's 33%. All in One Calculator also leads on rating (4.7 vs 3.5) and ratings volume (187 vs 2). Stack RPN Calculator's advantage is iOS requirement (11.0 vs 18.0). On price, ads, in-app purchases and monetization model there is nothing between them.

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

All in One Calculator holds the better App Store score, 4.7 against 3.5. That said, the two scores are not equally well evidenced: All in One Calculator has 187 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 85% of All in One Calculator's written reviews are positive against 33% of Stack RPN Calculator's.

## The numbers

| Metric | All in One Calculator | Stack RPN Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.7 (187 ratings)](https://appshunter.io/ios/app/all-in-one-calculator/id664569132/reviews)** | [3.5 (2 ratings)](https://appshunter.io/ios/app/stack-rpn-calculator/id1493986697/reviews) |
| Number of ratings | **187** | 2 |
| Positive reviews | **84.8% of reviews** | 33.3% of reviews |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | — |
| Monetization | Free | Free |
| Size | 70 MB | 10 MB |
| Requires iOS | 18.0 | **11.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ramon Rivas](https://appshunter.io/developer/664569135) | [Dario Bersiga](https://appshunter.io/developer/668388549) |

## What reviewers say

### All in One Calculator

[App page](https://appshunter.io/ios/app/all-in-one-calculator/id664569132)

This comprehensive calculator app offers a wide range of functionalities for everyday and complex calculations. It features multiple calculator views, a unit converter, and a detailed history log. Designed for ease of use and accessibility, it supports multitasking and various input methods.

**Highlights:** Multiple calculator views (Standard, RPN, Programmer), Extensive unit converter with nearly 500 units, Detailed calculation history with annotation, Multitasking and drag-and-drop support, Adjustable precision and keyboard shortcuts, Light and Dark appearance options

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none

**What reviewers like**

- 👍 Comprehensive conversion tables
- 💡 Advanced features (binary, hex, octal)
- 👍 Multiple calculator types
- 👍 Logic formulas support
- 👍 Free and ad-free

**What reviewers complain about**

- 🐛 Nagging to log in to iPhone account
- 🐛 Unresponsive keypad at times
- 🐛 App 'blinks' on iPad
- 🐛 Two taps required for number entry
- 🐛 Exponent function issues

**Reported bugs**

- Constantly nags to login to iPhone account
- Keypad is unresponsive
- App 'blinks' on iPad Pro
- Two taps of enter key required
- Exponent function (y^x) yields 0

**Requested features**

- Electrical circuit calculator/chart for AC/DC circuits
- Support for signed integers (16, 32, 64 bit) in programmer mode


### Stack RPN Calculator

[App page](https://appshunter.io/ios/app/stack-rpn-calculator/id1493986697)

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.

**Highlights:** Visible scientific functions, RPN (Reverse Polish Notation) input, Stack display for up to 4 values, Large number storage capacity, Designed for iPhone and iPad

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is All in One Calculator free?

All in One Calculator is free to download, with no in-app purchases.

### Is Stack RPN Calculator free?

Stack RPN Calculator is free to download, with no in-app purchases.

### Which has better reviews, All in One Calculator or Stack RPN Calculator?

All in One Calculator is rated higher. All in One Calculator averages 4.7 out of 5 from 187 ratings, while Stack RPN Calculator averages 3.5 from 2 ratings.

### Do All in One Calculator or Stack RPN Calculator have ads?

Neither All in One Calculator nor Stack RPN Calculator shows ads.

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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.*