Perspective Pixels vs Rules Measure
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Perspective Pixels
This tool helps you understand and compare display specifications like PPI, PPD, and FOV. Input your monitor's details to see how they affect your viewing experience and explore UI scaling effects. Save and compare unlimited configurations with a clean, intuitive interface.
- Calculate PPI, PPD, and FOV
- Explore UI scaling effects
- Save and compare monitor configurations
- Switch between metric and imperial units
- Intuitive and user-friendly interface
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Ever wondered how your monitor's specs truly translate to your viewing experience? Perspective Pixels is a tool that makes it easy to understand and compare the technical details of displays. Whether you’re researching new monitors, comparing your work and home setups, or just curious about the numbers, input the specs to see the key metrics that define a display’s characteristics. Key Features: * Learn Key Metrics: Calculate and learn about Pixels Per Inch (PPI), Pixels Per Degree (PPD), and Field of View (FOV) for any screen. * Explore UI Scaling: See how operating system scaling affects a display's effective resolution and pixel density. * Save & Compare: Save an unlimited number of monitor configurations. Easily compare your current screen, a friend's setup, or that new monitor you're considering. * Metric & Imperial Units: Seamlessly switch between inches and centimeters for all measurements. * Clean & Intuitive Interface: A user-friendly design that makes complex specs simple to explore.
Rules Measure
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Rules turns your iPhone and iPad into calibrated, practical measurement tools. Use Rules to measure with confidence on screen: - Standard Ruler with imperial and metric units - Protractor Tool with a draggable ray for angle measurement - Shape Display for circles, rectangles, triangles, and polygons at real size - Polygon Tool with perimeter, area, edge lengths, and interior angles - Actual Size Viewer to display images at true physical size using image DPI metadata Built for accuracy: - Per-device display calibration - Manual calibration override for custom tuning - Fast unit switching between imperial and metric - Clean interface optimized for quick, repeatable measurements Whether you are checking print/layout scale, design dimensions, or geometry, Rules gives you reliable on-screen measuring tools in one app.
Screenshots
Verdict
The clearest difference is update cadence: Rules Measure at every 9 days against Perspective Pixels's every 5 months. Perspective Pixels's advantage is iOS requirement (18.0 vs 26.0). On price, ads, in-app purchases and device support 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. Neither carries in-app purchases, so what you see is what you pay.
Perspective Pixels ships an update every 5 months, Rules Measure every 9 days. The most recent releases landed on September 30, 2026 and September 12, 2026 respectively.
| Parameter | Perspective Pixels | Rules Measure |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 5 months | Every 9 days — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | — |
| Devices | iPhone | iPhone, iPad — better |
| Requires iOS | 18.0 — better | 26.0 |
| Further details — not scored | ||
| Size | 3 MB | 12 MB |
| Age rating | 4+ | 4+ |
| Developer | Ryan Himmelwright | Davis McDowell |
In-app purchases
Perspective Pixels
No in-app purchases
Rules Measure
No in-app purchases
Questions
Is Perspective Pixels free?
Is Rules Measure free?
Do Perspective Pixels or Rules Measure have ads?
Which is updated more often, Perspective Pixels or Rules Measure?
Other comparisons
