# kong calculator vs ReadableCalc

The clearest difference is ads: ReadableCalc at none against kong calculator's shown. ReadableCalc also leads on iOS requirement (12.0 vs 15.0). On price, update cadence, in-app purchases and device support there is nothing between them.

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

kong calculator ships an update every 4 days, ReadableCalc weekly. The most recent releases landed on October 6, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | kong calculator | ReadableCalc |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Weekly |
| Size | 20 MB | 28 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Changyeol Seo](https://appshunter.io/developer/551904752) | [YONAGARE LAB](https://appshunter.io/developer/1810986554) |

## What reviewers say

### kong calculator

[App page](https://appshunter.io/ios/app/kong-calculator/id1594969449)

**Features:** macOS Compatibility

**In-app purchases:** none


### ReadableCalc

[App page](https://appshunter.io/ios/app/readablecalc/id6747457253)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is kong calculator free?

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

### Is ReadableCalc free?

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

### Do kong calculator or ReadableCalc have ads?

kong calculator shows ads; ReadableCalc does not.

### Which is updated more often, kong calculator or ReadableCalc?

kong calculator ships an update every 4 days, and ReadableCalc weekly. Most recently, kong calculator was updated on October 6, 2026 and ReadableCalc on October 7, 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.*