# Numeric Correction Calculator vs Feet Inch Builder Calculator

The clearest difference is in-app purchases: Numeric Correction Calculator at none against Feet Inch Builder Calculator's 1. Feet Inch Builder Calculator's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Feet Inch Builder Calculator sells 1 one-off in-app purchase. Numeric Correction Calculator asks for nothing beyond the download.

Both ship on a similar rhythm, roughly fortnightly. The most recent releases landed on October 9, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Numeric Correction Calculator | Feet Inch Builder Calculator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Fortnightly | Fortnightly |
| Size | 9 MB | 30 MB |
| Requires iOS | 15.4 | **15.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nobuyuki Kumakura](https://appshunter.io/developer/1529070760) | [Mehmet Murat Kizilaslan](https://appshunter.io/developer/1853227082) |

## What reviewers say

### Numeric Correction Calculator

[App page](https://appshunter.io/ios/app/numeric-correction-calculator/id6449193336)

**In-app purchases:** none


### Feet Inch Builder Calculator

[App page](https://appshunter.io/ios/app/feet-inch-builder-calculator/id6805005541)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| TrueRule Pro | $24.99 | one-time |


## Frequently asked questions

### Is Numeric Correction Calculator free?

Numeric Correction Calculator is free to download, with no in-app purchases.

### Is Feet Inch Builder Calculator free?

Feet Inch Builder Calculator is free to download, with in-app purchases available.

### Do Numeric Correction Calculator or Feet Inch Builder Calculator have ads?

Numeric Correction Calculator shows ads; Feet Inch Builder Calculator does not.

### Which is updated more often, Numeric Correction Calculator or Feet Inch Builder Calculator?

Numeric Correction Calculator ships an update fortnightly, and Feet Inch Builder Calculator fortnightly. Most recently, Numeric Correction Calculator was updated on October 9, 2026 and Feet Inch Builder Calculator on October 31, 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.*