# kong calculator vs CalcMemo929

The clearest difference is in-app purchases: kong calculator at none against CalcMemo929's 1. kong calculator also leads on update cadence (every 4 days vs every 2 weeks). CalcMemo929's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. CalcMemo929 sells 1 one-off in-app purchase. kong calculator asks for nothing beyond the download.

kong calculator ships an update every 4 days, CalcMemo929 every 2 weeks. The most recent releases landed on October 6, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | kong calculator | CalcMemo929 |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | — | 50.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 4 days** | Every 2 weeks |
| Monetization | — | Free with in-app purchases |
| Size | 20 MB | 1 MB |
| Requires iOS | **15.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Changyeol Seo](https://appshunter.io/developer/551904752) | [YOSHIHIRO TAKAHASHI](https://appshunter.io/developer/574193873) |

## What reviewers say

### kong calculator

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

**Features:** macOS Compatibility

**In-app purchases:** none


### CalcMemo929

[App page](https://appshunter.io/ios/app/calcmemo929/id6451918962)

This app combines a simple calculator with note-taking capabilities, allowing users to solve math problems and save calculation processes as memos for easy reference. Its user-friendly interface and clear display enhance the learning and work experience.

**Highlights:** Intuitive user interface, Clear display of calculations, Save calculations as memos, Full-screen number display in landscape, Supports learning and work tasks

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium Plan | $0.49 | one-time |


## Frequently asked questions

### Is kong calculator free?

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

### Is CalcMemo929 free?

CalcMemo929 is free to download, with in-app purchases available.

### Do kong calculator or CalcMemo929 have ads?

kong calculator shows ads; CalcMemo929 does not.

### Which is updated more often, kong calculator or CalcMemo929?

kong calculator ships an update every 4 days, and CalcMemo929 every 2 weeks. Most recently, kong calculator was updated on October 6, 2026 and CalcMemo929 on October 15, 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.*