# Feet Inch Calculator vs Engineering 單位流量換算

The clearest difference is update cadence: Engineering 單位流量換算 at every 2 months against Feet Inch Calculator's every 7 months. Engineering 單位流量換算 also leads on iOS requirement (17.6 vs 26.2). On price, ads, 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.

Feet Inch Calculator ships an update every 7 months, Engineering 單位流量換算 every 2 months. The most recent releases landed on October 25, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | Feet Inch Calculator | Engineering 單位流量換算 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 7 months | **Every 2 months** |
| Size | 5 MB | 4 MB |
| Requires iOS | 26.2 | **17.6** |
| Devices | iPhone | **iPhone, iPad** |
| Age rating | 4+ | 4+ |
| Developer | [Discoveruapps v.o.f.](https://appshunter.io/developer/1089131650) | [CHUNG-HSIEN YU](https://appshunter.io/developer/1872617732) |

## What reviewers say

### Feet Inch Calculator

[App page](https://appshunter.io/ios/app/feet-inch-calculator-convert/id6758353563)

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

**In-app purchases:** none


### Engineering 單位流量換算

[App page](https://appshunter.io/ios/app/engineering/id6758377219)

**In-app purchases:** none


## Frequently asked questions

### Is Feet Inch Calculator free?

Feet Inch Calculator is free to download, with no in-app purchases.

### Is Engineering 單位流量換算 free?

Engineering 單位流量換算 is free to download, with no in-app purchases.

### Do Feet Inch Calculator or Engineering 單位流量換算 have ads?

Neither Feet Inch Calculator nor Engineering 單位流量換算 shows ads.

### Which is updated more often, Feet Inch Calculator or Engineering 單位流量換算?

Feet Inch Calculator ships an update every 7 months, and Engineering 單位流量換算 every 2 months. Most recently, Feet Inch Calculator was updated on October 25, 2026 and Engineering 單位流量換算 on October 5, 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.*