# RPN vs Suanyi

The clearest difference is price: Suanyi at Free against RPN's $4.99. RPN's advantage is in-app purchases (none vs 2) and device support (3 vs 1). On ads there is nothing between them.

Suanyi is free to download; RPN costs $4.99 up front. Suanyi sells 2 in-app purchases, starting at $4.99 per 7 days. RPN asks for nothing beyond the download.

## The numbers

| Metric | RPN | Suanyi |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 7 months | — |
| Size | 1 MB | 3 MB |
| Requires iOS | **16.6** | 18.0 |
| Devices | **iPhone, iPad, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Steven Davies](https://appshunter.io/developer/1705785558) | [薇薇 殷](https://appshunter.io/developer/1874158488) |

## What reviewers say

### RPN

[App page](https://appshunter.io/ios/app/rpn-calc/id6464329997)

**Features:** Vision Pro support

**In-app purchases:** none


### Suanyi

[App page](https://appshunter.io/ios/app/suanyi/id6758982336)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Core | $4.99 | per 7 days |
| Yearly Core | $39.99 | per year |


## Frequently asked questions

### Is RPN free?

RPN costs $4.99, with no in-app purchases.

### Is Suanyi free?

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

### Do RPN or Suanyi have ads?

Neither RPN nor Suanyi 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.*