# Only One Calculator vs Suanyi

The clearest difference is in-app purchases: Only One Calculator at none against Suanyi's 2. Only One Calculator also leads on iOS requirement (11.0 vs 18.0). On price, ads and device support there is nothing between them.

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

## The numbers

| Metric | Only One Calculator | Suanyi |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/only-one-calculator/id1488596497/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 weeks | — |
| Monetization | Free | — |
| Size | 34 MB | 3 MB |
| Requires iOS | **11.0** | 18.0 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Jia Hua Huang](https://appshunter.io/developer/1488596496) | [薇薇 殷](https://appshunter.io/developer/1874158488) |

## What reviewers say

### Only One Calculator

[App page](https://appshunter.io/ios/app/only-one-calculator/id1488596497)

This utility app offers instant currency exchange and unit conversions, making it ideal for travel and shopping. It features undo/redo functionality for easy editing and supports over 160 currencies with customizable update frequencies.  Users can also access calculation history and customize the keyboard.

**Highlights:** Instant currency exchange, Unit conversion (length, weight, area, volume, temperature), Undo/Redo functionality, History of calculations, Customizable keyboard layout, Real-time calculation results

**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 Only One Calculator free?

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

### Is Suanyi free?

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

### Do Only One Calculator or Suanyi have ads?

Neither Only One Calculator 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.*