# Unit Converter vs When Again?

The clearest difference is in-app purchases: Unit Converter at none against When Again?'s 1. Unit Converter also leads on ads (none vs shown) and iOS requirement (13.0 vs 16.4). When Again?'s advantage is update cadence (daily vs every 8 days). On price and device support there is nothing between them.

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

Unit Converter ships an update every 8 days, When Again? daily. The most recent releases landed on October 13, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Unit Converter | When Again? |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/unit-converter-simple-and-easy/id6470110472/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 days | **Daily** |
| Monetization | Free | — |
| Size | 55 MB | 59 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Horikiri Seiu](https://appshunter.io/developer/1480680977) | [Masamune Hiroiwa](https://appshunter.io/developer/1882916292) |

## What reviewers say

### Unit Converter

[App page](https://appshunter.io/ios/app/unit-converter-simple-and-easy/id6470110472)

Easily convert between various units of measurement for everyday tasks. This application offers a simple and convenient user interface for quick calculations. Convert speed, weight, distance, temperature, and more with ease.

**Highlights:** Simple and convenient UI, Perform various unit conversions, Convert speed, weight, distance, temperature, Easy to use for everyday tasks

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

**In-app purchases:** none


### When Again?

[App page](https://appshunter.io/ios/app/when-again/id6772761503)

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム（買い切り） | $4.99 | one-time |


## Frequently asked questions

### Is Unit Converter free?

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

### Is When Again? free?

When Again? is free to download, with in-app purchases available.

### Do Unit Converter or When Again? have ads?

When Again? shows ads; Unit Converter does not.

### Which is updated more often, Unit Converter or When Again??

Unit Converter ships an update every 8 days, and When Again? daily. Most recently, Unit Converter was updated on October 13, 2026 and When Again? on October 8, 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.*