# Rul3r vs Gdisp

The clearest difference is in-app purchases: Gdisp at none against Rul3r's 1. Gdisp also leads on update cadence (every 4 weeks vs every 2 months). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Rul3r sells 1 one-off in-app purchase. Gdisp asks for nothing beyond the download.

Rul3r ships an update every 2 months, Gdisp every 4 weeks. The most recent releases landed on November 9, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Rul3r | Gdisp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.4 (1.1K ratings)](https://appshunter.io/ios/app/rul3r/id997746189/reviews)** | — |
| Number of ratings | **1.1K** | — |
| Positive reviews | 45.5% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 7 MB | 4 MB |
| Requires iOS | 16.0 | **15.5** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [YOYASOFT LLC](https://appshunter.io/developer/325345561) | [Shuntaro Shinohara](https://appshunter.io/developer/1639827056) |

## What reviewers say

### Rul3r

[App page](https://appshunter.io/ios/app/rul3r/id997746189)

This utility app provides a portable ruler for on-the-go measurements. It also includes a suite of additional tools like a protractor, spirit level, and various meters for diverse measurement needs.

**Highlights:** Portable ruler, Protractor, Spirit level, Altimeter, Decibel meter, Plumb line

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Remove Ads | $2.99 | one-time |


### Gdisp

[App page](https://appshunter.io/ios/app/gdisp/id1639827054)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Rul3r free?

Rul3r is free to download, with in-app purchases available.

### Is Gdisp free?

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

### Do Rul3r or Gdisp have ads?

Both Rul3r and Gdisp show ads.

### Which is updated more often, Rul3r or Gdisp?

Rul3r ships an update every 2 months, and Gdisp every 4 weeks. Most recently, Rul3r was updated on November 9, 2026 and Gdisp on November 3, 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.*