# Doubling Time Calculator vs Kitty Clock

The clearest difference is in-app purchases: Doubling Time Calculator at none against Kitty Clock's 1. Doubling Time Calculator also leads on ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

Both are free to download. Kitty Clock sells 1 one-off in-app purchase. Doubling Time Calculator asks for nothing beyond the download.

## The numbers

| Metric | Doubling Time Calculator | Kitty Clock |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[1.0 (1 ratings)](https://appshunter.io/ios/app/kitty-clock/id6451078399/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | — | Fortnightly |
| Monetization | — | Free with in-app purchases |
| Size | 41 MB | 46 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Stage Coding](https://appshunter.io/developer/1637068135) | [Mihoko Araki](https://appshunter.io/developer/1476136915) |

## What reviewers say

### Doubling Time Calculator

[App page](https://appshunter.io/ios/app/doubling-time-calculator/id1619683812)

**Features:** macOS Compatibility

**In-app purchases:** none


### Kitty Clock

[App page](https://appshunter.io/ios/app/kitty-clock/id6451078399)

Customize your device's display with a charming clock featuring adorable kitten images. Personalize the time text, clock hands, and kitten placement, with options to adjust size, format, and even set custom time signals. Enjoy a visually appealing and functional timepiece.

**Highlights:** 20 different kitten pictures, Movable time text, analog clock, and kitten, Zoomable analog clock and kitten, Adjustable font size and display elements, Customizable time signal tones, Screen rotation support

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Kitty Clock with no ads | $1.99 | one-time |


## Frequently asked questions

### Is Doubling Time Calculator free?

Doubling Time Calculator is free to download, with no in-app purchases.

### Is Kitty Clock free?

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

### Do Doubling Time Calculator or Kitty Clock have ads?

Kitty Clock shows ads; Doubling Time Calculator does not.

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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.*