# 2numbers vs CalcKing Pro

The clearest difference is update cadence: CalcKing Pro at weekly against 2numbers's every 27 months. 2numbers's advantage is iOS requirement (12.0 vs 15.0). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. 2numbers sells 1 one-off in-app purchase and CalcKing Pro sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

2numbers ships an update every 27 months, CalcKing Pro weekly. The most recent releases landed on October 13, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 2numbers | CalcKing Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 27 months | **Weekly** |
| Size | 2 MB | 2 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Marco Locatelli](https://appshunter.io/developer/380883258) | [文娟 唐](https://appshunter.io/developer/1870722016) |

## What reviewers say

### 2numbers

[App page](https://appshunter.io/ios/app/2numbers-2numeri/id1092951537)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Dark Graphics | $0.99 | one-time |


### 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 |


## Frequently asked questions

### Is 2numbers free?

2numbers is free to download, with in-app purchases available.

### Is CalcKing Pro free?

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

### Do 2numbers or CalcKing Pro have ads?

Neither 2numbers nor CalcKing Pro shows ads.

### Which is updated more often, 2numbers or CalcKing Pro?

2numbers ships an update every 27 months, and CalcKing Pro weekly. Most recently, 2numbers was updated on October 13, 2026 and CalcKing Pro on October 25, 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.*