# Easy Calculator vs Stackis RPN

The clearest difference is rating: Stackis RPN at 5.0 against Easy Calculator's 3.9. Stackis RPN also leads on review sentiment (100% vs 87%). Easy Calculator's advantage is ratings volume (11 vs 2) and iOS requirement (15.6 vs 17.6). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Easy Calculator sells 1 one-off in-app purchase and Stackis RPN sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Stackis RPN holds the better App Store score, 5.0 against 3.9. That said, the two scores are not equally well evidenced: Easy Calculator has 11 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 87% of Easy Calculator's written reviews are positive against 100% of Stackis RPN's.

Easy Calculator ships an update weekly, Stackis RPN every 4 days. The most recent releases landed on October 17, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Easy Calculator | Stackis RPN |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.9 (11 ratings)](https://appshunter.io/ios/app/easy-calculator-easycalc/id6746744871/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/stackis-rpn/id6752929114/reviews)** |
| Number of ratings | **11** | 2 |
| Positive reviews | 87.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Weekly | **Every 4 days** |
| Monetization | Free | Free |
| Size | 23 MB | 10 MB |
| Requires iOS | **15.6** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [伟鹏 李](https://appshunter.io/developer/1817642925) | [Skimra](https://appshunter.io/developer/403502071) |

## What reviewers say

### Easy Calculator

[App page](https://appshunter.io/ios/app/easy-calculator-easycalc/id6746744871)

This app offers a smart and efficient computing experience with automatic history saving and a comprehensive unit converter. It provides customizable themes, flexible display settings, and optional haptic feedback for enhanced interaction.

**Highlights:** Smart history tracking, Unit converter, Sound and voice feedback, Customizable themes, Flexible display settings, Haptic feedback

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Premium Membership | $2.99 | one-time |


### Stackis RPN

[App page](https://appshunter.io/ios/app/stackis-rpn/id6752929114)

A calculator designed for users who prefer Reverse Polish Notation (RPN). It offers a familiar interface for RPN users and includes support for duodecimal calculations.

**Highlights:** RPN calculation style, Duodecimal (dozenal) support, Familiar interface for RPN users, Simple and pleasant user experience

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Advanced Mode | $1.99 | one-time |


## Frequently asked questions

### Is Easy Calculator free?

Easy Calculator is free to download, with in-app purchases available.

### Is Stackis RPN free?

Stackis RPN is free to download, with in-app purchases available.

### Which has better reviews, Easy Calculator or Stackis RPN?

Stackis RPN is rated higher. Easy Calculator averages 3.9 out of 5 from 11 ratings, while Stackis RPN averages 5.0 from 2 ratings.

### Do Easy Calculator or Stackis RPN have ads?

Neither Easy Calculator nor Stackis RPN shows ads.

### Which is updated more often, Easy Calculator or Stackis RPN?

Easy Calculator ships an update weekly, and Stackis RPN every 4 days. Most recently, Easy Calculator was updated on October 17, 2026 and Stackis RPN on October 12, 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.*