Comparison

Length 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

Length

Features
Read full description

Turn your device into a ruler and measure small distances in either imperial inches or metric cm and convert any value between the two units. Features: - inch/cm converter for any arbitrary value - tap and drag the line to snap to multiple values of 0.05in (left side) or 0.1cm (right side) - supports the iPad Pro, iPad Mini and all iPhones - support for the iPad multitasking (split view..)

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

Length4 screens
Scala Architectural Scale4 screens

Verdict

The call

The clearest difference is price: Scala Architectural Scale at Free against Length's $0.99. Scala Architectural Scale also leads on update cadence (every 4 months vs every 11 months). Length's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 15.6). On ads 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

CostPrice · In-app purchases · Ads · Monetization

Scala Architectural Scale is free to download; Length costs $0.99 up front. Scala Architectural Scale sells 1 one-off in-app purchase. Length asks for nothing beyond the download.

UpkeepUpdate frequency

Length ships an update every 11 months, Scala Architectural Scale every 4 months. The most recent releases landed on October 18, 2026 and October 5, 2026 respectively.

Scorecard4 real differences · 6 level
Length versus Scala Architectural Scale: the parameters behind the verdict, then further details
ParameterLengthScala Architectural Scale
Price$0.99Free — better
Rating—4.6 (25 ratings) — better
Positive reviews—86.7% of reviews
Number of ratings—25 — better
Update frequencyEvery 11 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.6
Further details — not scored
Size34 MB1 MB
Age rating4+4+
DeveloperPiet JonasNoerah Alvi

In-app purchases

None

Length

No in-app purchases

1 purchases

Scala Architectural Scale

One-time1
  • Scala Full Version$2.99

Questions

Is Length free?
Length costs $0.99, with no in-app purchases.
Is Scala Architectural Scale free?
Scala Architectural Scale is free to download, with in-app purchases available.
Do Length or Scala Architectural Scale have ads?
Neither Length nor Scala Architectural Scale shows ads.
Which is updated more often, Length or Scala Architectural Scale?
Length ships an update every 11 months, and Scala Architectural Scale every 4 months. Most recently, Length was updated on October 18, 2026 and Scala Architectural Scale on October 5, 2026.

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