# Hourglass vs Rabbit RSSリーダー

The clearest difference is update cadence: Hourglass at every 4 days against Rabbit RSSリーダー's every 23 months. 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.

Hourglass ships an update every 4 days, Rabbit RSSリーダー every 23 months. The most recent releases landed on September 15, 2026 and September 4, 2026 respectively.

## The numbers

| Metric | Hourglass | Rabbit RSSリーダー |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | Yes | Yes |
| Update frequency | **Every 4 days** | Every 23 months |
| Size | 33 MB | 43 MB |
| Requires iOS | 16.0 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [kenji abe](https://appshunter.io/developer/1461779902) | [RANRAN Solutions](https://appshunter.io/developer/1760305402) |

## What reviewers say

### Hourglass

[App page](https://appshunter.io/ios/app/hourglass-physics-simulation/id6670490622)

**Features:** macOS Compatibility

**In-app purchases:** none


### Rabbit RSSリーダー

[App page](https://appshunter.io/ios/app/rabbit-rss/id6736563258)

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

**In-app purchases:** none


## Frequently asked questions

### Is Hourglass free?

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

### Is Rabbit RSSリーダー free?

Rabbit RSSリーダー is free to download, with no in-app purchases.

### Do Hourglass or Rabbit RSSリーダー have ads?

Both Hourglass and Rabbit RSSリーダー show ads.

### Which is updated more often, Hourglass or Rabbit RSSリーダー?

Hourglass ships an update every 4 days, and Rabbit RSSリーダー every 23 months. Most recently, Hourglass was updated on September 15, 2026 and Rabbit RSSリーダー on September 4, 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.*