# RadNow! vs withday

The clearest difference is update cadence: withday at every 2 weeks against RadNow!'s every 3 weeks. RadNow!'s advantage is iOS requirement (16.0 vs 18.0). 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.

RadNow! ships an update every 3 weeks, withday every 2 weeks. The most recent releases landed on August 25, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | RadNow! | withday |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/radnow/id6476801525/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Monetization | Free | — |
| Size | 8 MB | 108 MB |
| Requires iOS | **16.0** | 18.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Borzoi AI株式会社](https://appshunter.io/developer/1766880957) | [RYOSUKE HIRAMATSU](https://appshunter.io/developer/616750780) |

## What reviewers say

### RadNow!

[App page](https://appshunter.io/ios/app/radnow/id6476801525)

This app visualizes real-time radiation levels across Japan using data from over 4900 monitoring posts. It offers an intuitive map interface with color-coded icons and historical data graphs for easy understanding of radiation trends.

**Highlights:** Real-time radiation data visualization, Nationwide monitoring post data, Interactive map interface, Color-coded radiation level icons, Historical data graphs, Daily automatic updates

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

**In-app purchases:** none


### withday

[App page](https://appshunter.io/ios/app/withday/id6756597053)

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

**In-app purchases:** none


## Frequently asked questions

### Is RadNow! free?

RadNow! is free to download, with no in-app purchases.

### Is withday free?

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

### Do RadNow! or withday have ads?

Neither RadNow! nor withday shows ads.

### Which is updated more often, RadNow! or withday?

RadNow! ships an update every 3 weeks, and withday every 2 weeks. Most recently, RadNow! was updated on August 25, 2026 and withday on September 11, 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.*