# CalcKing Pro vs CalcLog

The clearest difference is in-app purchases: CalcLog at none against CalcKing Pro's 1. CalcKing Pro's advantage is update cadence (weekly vs every 3 weeks). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. CalcKing Pro sells 1 one-off in-app purchase. CalcLog asks for nothing beyond the download.

CalcKing Pro ships an update weekly, CalcLog every 3 weeks. The most recent releases landed on October 25, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | CalcKing Pro | CalcLog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Weekly** | Every 3 weeks |
| Size | 2 MB | 50 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [文娟 唐](https://appshunter.io/developer/1870722016) | [RedCandle Co.,Ltd.](https://appshunter.io/developer/1892951305) |

## What reviewers say

### CalcKing Pro

[App page](https://appshunter.io/ios/app/calcking-pro-professional/id6758431895)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 解锁功能 | $3.99 | one-time |


### CalcLog

[App page](https://appshunter.io/ios/app/calclog/id6762238065)

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

**In-app purchases:** none


## Frequently asked questions

### Is CalcKing Pro free?

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

### Is CalcLog free?

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

### Do CalcKing Pro or CalcLog have ads?

Neither CalcKing Pro nor CalcLog shows ads.

### Which is updated more often, CalcKing Pro or CalcLog?

CalcKing Pro ships an update weekly, and CalcLog every 3 weeks. Most recently, CalcKing Pro was updated on October 25, 2026 and CalcLog on October 18, 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.*