Epic Ruler vs Scala Architectural Scale
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Epic Ruler
Transform your smartphone into a portable measuring tool. Accurately measure lengths in both inches and centimeters directly from your device.
- Converts phone to ruler
- Measures in inches
- Measures in centimeters
- Pocket-sized utility
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This app turns your phone into a portable pocket ruler, with support for both inches and centimeters.
Scala Architectural Scale
This app allows users to measure printed architectural and engineering drawings directly on their device. It supports both known and unknown scales, offering fixed and variable scale options for precise measurements. Users can also select secondary units for quick conversions.
- Fixed and variable scale measurement
- Supports unknown drawing scales
- Secondary unit conversions (metric, decimal feet, feet/inches)
- Adjustable measurement precision
- Extensive scale options for architectural, engineering, and metric drawings
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Let Scala Architectural and Engineering Scale change the way you measure printed drawings on the go and at your desk. With fixed and variable scales there is no limit to measuring a printed drawing of any scale, even if the scale is unknown. FIXED SCALES If you know the scale of a drawing, place your device on the drawing, scroll to the scale of the printed drawing and watch the chosen scale slide in. VARIABLE SCALES If the scale of a drawing is unknown, slide your finger on the variable scale and match the scale of one known element, lock it and use it to measure all elements on that drawing. MEASURING Slide the measurement slider in fixed or variable scale modes, along the scale to see the desired measurement displayed. SECONDARY UNITS Choose secondary units to be displayed while measuring, to quickly convert between metric, decimal feet and feet and inches. PRECISION Control the precision of the measurement units. —-— Scala Free Version includes: ARCHITECTURAL Fixed Scales: Full Scale (12”=1’-0”), 6”=1’-0”, 3”=1’-0”, 1 1/2”=1’-0”, 1”=1’-0”, 3/4”=1’-0” Variable Scale Range: Between full scale and 1/32”=1’-0” ENGINEERING Fixed Scales: 1”=10’, 1”=20’, 1”=30’, 1”=40’, 1”=50’ and 1”=60’ Variable Scale Range: Between 1”=10’ and 1”=300’ METRIC Fixed Scales: 1:1, 1:2, 1:5, 1:10, 1:20, 1:25 Variable Scale Range: Between 1:1 and 1:1000 Scala Full Version includes all scales above plus the following: ARCHITECTURAL Fixed Scales: 1/2”=1’-0”, 3/8”=1’-0”, 1/4”=1’-0”, 3/16”=1’-0”, 1/8”=1’-0”, 3/32”=1’-0”, 1/16”=1’-0”, 1/32"=1'-0" ENGINEERING Fixed Scales: 1"=80', 1"=100', 1"=200', 1"=300' METRIC Fixed Scales: 1:30, 1:40, 1:50, 1:75, 1:100, 1:125, 1:200, 1:250, 1:300, 1:400, 1:500, 1:1000 —-—
Screenshots
Verdict
The clearest difference is review sentiment: Scala Architectural Scale at 87% against Epic Ruler's 0%. Scala Architectural Scale also leads on rating (4.6 vs 1.0) and update cadence (every 4 months vs every 17 months). Epic Ruler's advantage is in-app purchases (none vs 1). On price, ads and monetization model 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. Scala Architectural Scale sells 1 one-off in-app purchase. Epic Ruler asks for nothing beyond the download.
Scala Architectural Scale holds the better App Store score, 4.6 against 1.0. That said, the two scores are not equally well evidenced: Scala Architectural Scale has 25 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 0% of Epic Ruler's written reviews are positive against 87% of Scala Architectural Scale's.
Epic Ruler ships an update every 17 months, Scala Architectural Scale every 4 months. The most recent releases landed on August 11, 2026 and July 17, 2026 respectively.
| Parameter | Epic Ruler | Scala Architectural Scale |
|---|---|---|
| Price | Free | Free |
| Rating | 1.0 (4 ratings) | 4.6 (25 ratings) — better |
| Positive reviews | 0.0% of reviews | 86.7% of reviews — better |
| Number of ratings | 4 | 25 — better |
| Update frequency | Every 17 months | Every 4 months — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | Free |
| Devices | iPhone | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 15.6 — better |
| Further details — not scored | ||
| Size | 11 MB | 1 MB |
| Age rating | 4+ | 4+ |
| Developer | Chih-Hao Chen | Noerah Alvi |
Customer experience
Epic Ruler
Scala Architectural Scale
In-app purchases
Epic Ruler
No in-app purchases
Scala Architectural Scale
- Scala Full Version$2.99
Questions
Is Epic Ruler free?
Is Scala Architectural Scale free?
Which has better reviews, Epic Ruler or Scala Architectural Scale?
Do Epic Ruler or Scala Architectural Scale have ads?
Which is updated more often, Epic Ruler or Scala Architectural Scale?
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