Rul3r vs Gdisp
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Rul3r
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.
- Portable ruler
- Protractor
- Spirit level
- Altimeter
- Decibel meter
- Plumb line
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Did you ever want to measure the length of something but you had no ruler at hand? Rul3r was created exactly for situations like this, so that a portable ruler is always available to you on your phone, whenever you need it. What's more, Rul3r provides a lot more tools: * Protractor * Plumb Line * Spirit Level * Elevation, Air Pressure and Location meter * Decibel Meter * Ordinal Date Converter
Gdisp
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Easy and simple to get longitudinal and lateral acceleration. This is useful because the information can be projected along with the video recording. Feature - Clock and 2-axis acceleration indicator - LowPassFilter - Zero offset button
Screenshots
Verdict
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.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
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.
| Parameter | Rul3r | Gdisp |
|---|---|---|
| Price | Free | Free |
| Rating | 4.4 (1.1K ratings) — better | — |
| Positive reviews | 45.5% of reviews | — |
| Number of ratings | 1.1K — better | — |
| Update frequency | Every 2 months | Every 4 weeks — better |
| Ads | Yes | Yes |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | — |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 16.0 | 15.5 — better |
| Further details — not scored | ||
| Size | 7 MB | 4 MB |
| Age rating | 4+ | 4+ |
| Developer | YOYASOFT LLC | Shuntaro Shinohara |
In-app purchases
Rul3r
- Remove Ads$2.99
Gdisp
No in-app purchases
