# PrefixCalc vs Suanyi

The clearest difference is in-app purchases: PrefixCalc at none against Suanyi's 2. PrefixCalc also leads on device support (3 vs 1) and iOS requirement (12.0 vs 18.0). On price and ads there is nothing between them.

Both are free to download. Suanyi sells 2 in-app purchases, starting at $4.99 per 7 days. PrefixCalc asks for nothing beyond the download.

## The numbers

| Metric | PrefixCalc | Suanyi |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Size | 28 MB | 3 MB |
| Requires iOS | **12.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [YONAGARE LAB](https://appshunter.io/developer/1810986554) | [薇薇 殷](https://appshunter.io/developer/1874158488) |

## What reviewers say

### PrefixCalc

[App page](https://appshunter.io/ios/app/prefixcalc/id6748650037)

**Features:** macOS Compatibility

**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 PrefixCalc free?

PrefixCalc is free to download, with no in-app purchases.

### Is Suanyi free?

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

### Do PrefixCalc or Suanyi have ads?

Neither PrefixCalc 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.*