# 单位&汇率换算 vs iLightsIn Sync

The clearest difference is price: iLightsIn Sync at Free against 单位&汇率换算's $1.99. iLightsIn Sync also leads on update cadence (every 6 weeks vs every 3 months). 单位&汇率换算's advantage is iOS requirement (11.0 vs 13.0). On ads, in-app purchases and device support there is nothing between them.

iLightsIn Sync is free to download; 单位&汇率换算 costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

单位&汇率换算 ships an update every 3 months, iLightsIn Sync every 6 weeks. The most recent releases landed on October 2, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | 单位&汇率换算 | iLightsIn Sync |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/and/id513618181/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 6 weeks** |
| Monetization | Paid | — |
| Size | 8 MB | 41 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Xin Zhou](https://appshunter.io/developer/505384440) | [云江 王](https://appshunter.io/developer/1322295053) |

## What reviewers say

### 单位&汇率换算

[App page](https://appshunter.io/ios/app/and/id513618181)

This app offers comprehensive unit conversion for area, weight, volume, temperature, length, speed, pressure, fuel consumption, power, energy, torque, and angles. It also includes currency exchange for 46 countries and a calculator with tax computation and data transfer between functions.

**Highlights:** Extensive unit conversions (area, weight, volume, etc.), Currency exchange for 46 countries, Integrated calculator with tax function, Data transfer between converter and calculator, Unit search functionality, Supports various mathematical operations

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

**In-app purchases:** none


### iLightsIn Sync

[App page](https://appshunter.io/ios/app/ilightsin-sync/id6470256252)

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

**In-app purchases:** none


## Frequently asked questions

### Is 单位&汇率换算 free?

单位&汇率换算 costs $1.99, with no in-app purchases.

### Is iLightsIn Sync free?

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

### Do 单位&汇率换算 or iLightsIn Sync have ads?

Neither 单位&汇率换算 nor iLightsIn Sync shows ads.

### Which is updated more often, 单位&汇率换算 or iLightsIn Sync?

单位&汇率换算 ships an update every 3 months, and iLightsIn Sync every 6 weeks. Most recently, 单位&汇率换算 was updated on October 2, 2026 and iLightsIn Sync 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.*