Comparison

Scala Architectural Scale vs Architects Ruler

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

Head to head
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 —-—

About

Architects Ruler

Features
Read full description

Architects Ruler is made by architects for architects. And designers. Simple and convenient, a quick tool to get grip on all dimensions on any scale.

Screenshots

Scala Architectural Scale4 screens
Architects Ruler3 screens

Verdict

The call

The clearest difference is device support: Scala Architectural Scale at 3 against Architects Ruler's 1. Scala Architectural Scale also leads on iOS requirement (15.6 vs 26.0). On price, update cadence, ads and in-app purchases 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 and Architects Ruler sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Scala Architectural Scale ships an update every 4 months, Architects Ruler every 3 months. The most recent releases landed on October 26, 2026 and October 24, 2026 respectively.

Scorecard2 real differences · 8 level
Scala Architectural Scale versus Architects Ruler: the parameters behind the verdict, then further details
ParameterScala Architectural ScaleArchitects Ruler
PriceFreeFree
Rating4.6 (24 ratings) — better—
Positive reviews86.7% of reviews—
Number of ratings24 — better—
Update frequencyEvery 4 monthsEvery 3 months — better
AdsNoNo
In-app purchasesYesYes
MonetizationFree—
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS15.6 — better26.0
Further details — not scored
Size1 MB4 MB
Age rating4+4+
DeveloperNoerah AlviGijs Raggers

In-app purchases

1 purchases

Scala Architectural Scale

One-time1
  • Scala Full Version$2.99
1 purchases

Architects Ruler

One-time1
  • Lifetime scales menu$0.99

Questions

Is Scala Architectural Scale free?
Scala Architectural Scale is free to download, with in-app purchases available.
Is Architects Ruler free?
Architects Ruler is free to download, with in-app purchases available.
Do Scala Architectural Scale or Architects Ruler have ads?
Neither Scala Architectural Scale nor Architects Ruler shows ads.
Which is updated more often, Scala Architectural Scale or Architects Ruler?
Scala Architectural Scale ships an update every 4 months, and Architects Ruler every 3 months. Most recently, Scala Architectural Scale was updated on October 26, 2026 and Architects Ruler on October 24, 2026.

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