# Starlight Clock vs あとで読む | URL Stacker

The clearest difference is in-app purchases: あとで読む | URL Stacker at none against Starlight Clock's 1. あとで読む | URL Stacker also leads on update cadence (every 2 days vs every 3 months) and iOS requirement (12.0 vs 14.0). On price, ads and device support there is nothing between them.

Both are free to download. Starlight Clock sells 1 one-off in-app purchase. あとで読む | URL Stacker asks for nothing beyond the download.

Starlight Clock ships an update every 3 months, あとで読む | URL Stacker every 2 days. The most recent releases landed on September 30, 2026 and September 23, 2026 respectively.

## The numbers

| Metric | Starlight Clock | あとで読む | URL Stacker |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 3 months | **Every 2 days** |
| Size | 14 MB | 41 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 17+ |
| Developer | [Mihoko Araki](https://appshunter.io/developer/1476136915) | [NODGE Technologies inc.](https://appshunter.io/developer/1783916062) |

## What reviewers say

### Starlight Clock

[App page](https://appshunter.io/ios/app/starlight-clock/id6470951164)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Starlight Clock with no ads | $2.99 | one-time |


### あとで読む | URL Stacker

[App page](https://appshunter.io/ios/app/url-stacker/id6739153459)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Starlight Clock free?

Starlight Clock is free to download, with in-app purchases available.

### Is あとで読む | URL Stacker free?

あとで読む | URL Stacker is free to download, with no in-app purchases.

### Do Starlight Clock or あとで読む | URL Stacker have ads?

Both Starlight Clock and あとで読む | URL Stacker show ads.

### Which is updated more often, Starlight Clock or あとで読む | URL Stacker?

Starlight Clock ships an update every 3 months, and あとで読む | URL Stacker every 2 days. Most recently, Starlight Clock was updated on September 30, 2026 and あとで読む | URL Stacker on September 23, 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.*