# Shift Unit vs Unit Converter for Physics

The clearest difference is in-app purchases: Shift Unit at none against Unit Converter for Physics's 1. Shift Unit also leads on iOS requirement (16.0 vs 18.6). Unit Converter for Physics's advantage is update cadence (every 10 days vs every 2 months). On price, ads and device support there is nothing between them.

Both are free to download. Unit Converter for Physics sells 1 one-off in-app purchase. Shift Unit asks for nothing beyond the download.

Shift Unit ships an update every 2 months, Unit Converter for Physics every 10 days. The most recent releases landed on September 6, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | Shift Unit | Unit Converter for Physics |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (21 ratings)](https://appshunter.io/ios/app/shift-unit/id1514037983/reviews)** | — |
| Number of ratings | **21** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 10 days** |
| Monetization | Free | — |
| Size | 20 MB | 2 MB |
| Requires iOS | **16.0** | 18.6 |
| Devices | iPhone, Apple Watch | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Didier Burton](https://appshunter.io/developer/1514037982) | [Jatuphol Jaturapat](https://appshunter.io/developer/1788860463) |

## What reviewers say

### Shift Unit

[App page](https://appshunter.io/ios/app/shift-unit/id1514037983)

This utility app offers precise unit and currency conversions with over 1400 units across 34 categories. It supports light/dark modes, home widgets, and an independent Apple Watch app. Features include a custom keypad with calculator mode and educational Wikipedia integration.

**Highlights:** 1400+ conversion units, 34 categories, Light/dark mode support, Home widget, Apple Watch app, Custom keypad with calculator, Wikipedia integration

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### Unit Converter for Physics

[App page](https://appshunter.io/ios/app/unit-converter-for-physics/id6745997040)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Solution | $0.99 | one-time |


## Frequently asked questions

### Is Shift Unit free?

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

### Is Unit Converter for Physics free?

Unit Converter for Physics is free to download, with in-app purchases available.

### Do Shift Unit or Unit Converter for Physics have ads?

Neither Shift Unit nor Unit Converter for Physics shows ads.

### Which is updated more often, Shift Unit or Unit Converter for Physics?

Shift Unit ships an update every 2 months, and Unit Converter for Physics every 10 days. Most recently, Shift Unit was updated on September 6, 2026 and Unit Converter for Physics on September 19, 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.*