Comparison

Epic Ruler vs Scala Architectural Scale

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Epic Ruler

Transform your smartphone into a portable measuring tool. Accurately measure lengths in both inches and centimeters directly from your device.

Highlights
  • Converts phone to ruler
  • Measures in inches
  • Measures in centimeters
  • Pocket-sized utility
Features
Read full description

This app turns your phone into a portable pocket ruler, with support for both inches and centimeters.

About

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.

Highlights
  • 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
Features
Read full description

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

Epic Ruler2 screens
Scala Architectural Scale4 screens

Verdict

The call

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Scala Architectural Scale sells 1 one-off in-app purchase. Epic Ruler asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

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.

UpkeepUpdate frequency

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.

Scorecard7 real differences · 3 level
Epic Ruler versus Scala Architectural Scale: the parameters behind the verdict, then further details
ParameterEpic RulerScala Architectural Scale
PriceFreeFree
Rating1.0 (4 ratings)4.6 (25 ratings) — better
Positive reviews0.0% of reviews86.7% of reviews — better
Number of ratings425 — better
Update frequencyEvery 17 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFreeFree
DevicesiPhoneiPhone, iPad, iPod — better
Requires iOS26.015.6 — better
Further details — not scored
Size11 MB1 MB
Age rating4+4+
DeveloperChih-Hao ChenNoerah Alvi

Customer experience

Epic Ruler

All ratings4 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews8 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Scala Architectural Scale

All ratings25 ratings
Positive88.0%
Neutral8.0%
Negative4.0%
Written reviews15 reviews
Positive86.7%
Neutral0.0%
Negative13.3%

In-app purchases

None

Epic Ruler

No in-app purchases

1 purchases

Scala Architectural Scale

One-time1
  • Scala Full Version$2.99

Questions

Is Epic Ruler free?
Epic Ruler is free to download, with no in-app purchases.
Is Scala Architectural Scale free?
Scala Architectural Scale is free to download, with in-app purchases available.
Which has better reviews, Epic Ruler or Scala Architectural Scale?
Scala Architectural Scale is rated higher. Epic Ruler averages 1.0 out of 5 from 4 ratings, while Scala Architectural Scale averages 4.6 from 25 ratings.
Do Epic Ruler or Scala Architectural Scale have ads?
Neither Epic Ruler nor Scala Architectural Scale shows ads.
Which is updated more often, Epic Ruler or Scala Architectural Scale?
Epic Ruler ships an update every 17 months, and Scala Architectural Scale every 4 months. Most recently, Epic Ruler was updated on August 11, 2026 and Scala Architectural Scale on July 17, 2026.

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