# スマートコインロッカーSPACER vs Universal Unit Converter!

The clearest difference is ads: スマートコインロッカーSPACER at none against Universal Unit Converter!'s shown. Universal Unit Converter!'s advantage is update cadence (weekly vs every 6 weeks). On price, in-app purchases, device support and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

スマートコインロッカーSPACER ships an update every 6 weeks, Universal Unit Converter! weekly. The most recent releases landed on September 24, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | スマートコインロッカーSPACER | Universal Unit Converter! |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (15 ratings)](https://appshunter.io/ios/app/spacer/id1200289673/reviews)** | — |
| Number of ratings | **15** | — |
| Positive reviews | 2.0% of reviews | — |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 6 weeks | **Weekly** |
| Monetization | Ad-supported | — |
| Size | 63 MB | 41 MB |
| Requires iOS | 16.6 | **15.0** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [SPACER Co., Ltd.](https://appshunter.io/developer/1052521521) | [Taek Oh](https://appshunter.io/developer/1616205954) |

## What reviewers say

### スマートコインロッカーSPACER

[App page](https://appshunter.io/ios/app/spacer/id1200289673)

This app allows you to send, store, and reserve smart coin lockers using your smartphone. Electronic keys can be sent and received via your phone, enabling seamless luggage exchange between users without direct contact. It aims to revolutionize logistics by facilitating convenient item transfers.

**Highlights:** Send, store, and reserve smart lockers, Smartphone-controlled electronic keys, Send and receive keys via app, Facilitates contactless item exchange, Supports EC proximity transactions, Future-proof logistics solution

**Features:** Vision Pro support

**In-app purchases:** none


### Universal Unit Converter!

[App page](https://appshunter.io/ios/app/universal-unit-converter/id6785926049)

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

**In-app purchases:** none


## Frequently asked questions

### Is スマートコインロッカーSPACER free?

スマートコインロッカーSPACER is free to download, with no in-app purchases.

### Is Universal Unit Converter! free?

Universal Unit Converter! is free to download, with no in-app purchases.

### Do スマートコインロッカーSPACER or Universal Unit Converter! have ads?

Universal Unit Converter! shows ads; スマートコインロッカーSPACER does not.

### Which is updated more often, スマートコインロッカーSPACER or Universal Unit Converter!?

スマートコインロッカーSPACER ships an update every 6 weeks, and Universal Unit Converter! weekly. Most recently, スマートコインロッカーSPACER was updated on September 24, 2026 and Universal Unit Converter! on September 16, 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.*