# 定規(Ruler)for iPad vs Interval Voice Clock

The clearest difference is price: 定規(Ruler)for iPad at Free against Interval Voice Clock's $1.99. Interval Voice Clock's advantage is ads (none vs shown) and update cadence (every 2 weeks vs every 5 months). On review sentiment, in-app purchases and iOS requirement there is nothing between them.

定規(Ruler)for iPad is free to download; Interval Voice Clock costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

定規(Ruler)for iPad ships an update every 5 months, Interval Voice Clock every 2 weeks. The most recent releases landed on September 18, 2026 and September 22, 2026 respectively.

## The numbers

| Metric | 定規(Ruler)for iPad | Interval Voice Clock |
| --- | --- | --- |
| Price | **Free** | $1.99 |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/interval-voice-clock/id6476801545/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 60.0% of reviews | **66.7% of reviews** |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 5 months | **Every 2 weeks** |
| Monetization | **Ad-supported** | Paid |
| Size | 1 MB | 32 MB |
| Requires iOS | **14.1** | 15.0 |
| Devices | iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Mayumi Kato](https://appshunter.io/developer/705832872) | [Ryo Okamoto](https://appshunter.io/developer/418850607) |

## What reviewers say

### 定規(Ruler)for iPad

[App page](https://appshunter.io/ios/app/rulerfor-ipad/id1148435850)

This free utility app functions as a precise digital ruler for iPads. It supports both millimeter and inch measurements, making it easy to measure any object directly on your device. Designed for simplicity and a cool user experience.

**Highlights:** Digital ruler functionality, Millimeter measurement, Inch measurement, Supports all iPad sizes, Simple and cool interface

**In-app purchases:** none


### Interval Voice Clock

[App page](https://appshunter.io/ios/app/interval-voice-clock/id6476801545)

This app announces the current time at customizable intervals, allowing for hands-free time checks. It offers adjustable volume, voice options, and background playback, functioning entirely offline.

**Highlights:** Customizable announcement intervals, Adjustable announcement volume, Choice of male or female voice, Background playback support, Offline functionality, Multiple announcement types

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

**In-app purchases:** none


## Frequently asked questions

### Is 定規(Ruler)for iPad free?

定規(Ruler)for iPad is free to download, with no in-app purchases.

### Is Interval Voice Clock free?

Interval Voice Clock costs $1.99, with no in-app purchases.

### Do 定規(Ruler)for iPad or Interval Voice Clock have ads?

定規(Ruler)for iPad shows ads; Interval Voice Clock does not.

### Which is updated more often, 定規(Ruler)for iPad or Interval Voice Clock?

定規(Ruler)for iPad ships an update every 5 months, and Interval Voice Clock every 2 weeks. Most recently, 定規(Ruler)for iPad was updated on September 18, 2026 and Interval Voice Clock on September 22, 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.*