Comparison

Ruler+ Utility 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

Ruler+ Utility

Transform your smartphone into a versatile measuring tool. Instantly measure the length of objects using your phone's screen, with options for fixed or scroll modes. Save your measurements and choose between centimeters or inches for precise results.

Highlights
  • Smartphone ruler
  • Fixed and scroll measurement modes
  • Save measurements
  • Centimeter and inch support
  • Fine-tune scale
  • Intuitive interface
Features
Read full description

This app transforms your smartphone into a handy ruler. Whenever you’re curious about the length of something, you can measure it instantly with just your smartphone! From a pencil on your desk to the thickness of a book, 'Ruler' is perfect for quickly checking lengths. Without any complex explanations or difficult features, just open the app and measure according to the scale. Its intuitive interface allows anyone to measure quickly and accurately. Measurement methods: 1) Fixed Ruler: Place the object you want to measure on your smartphone, touch the screen with your finger, and move it to the end of the object to measure its length. 2) Scroll Ruler: Use this method to measure objects longer than your smartphone. Place your smartphone next to the object, hold it with your thumb and middle finger, touch the screen with your index finger, and move the phone gradually to measure the length. Main Features: - Easily save the measurements you take - Measure in both centimeters (cm) and inches (inch) - Fine-tune the scale for more precise measurements - Choose between fixed and scroll modes depending on your needs Never worry about not having a ruler again. With 'Ruler', you can measure anything conveniently at any time. Experience smart measurement now!

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

Ruler+ Utility4 screens
Scala Architectural Scale4 screens

Verdict

The call

The clearest difference is rating: Scala Architectural Scale at 4.6 against Ruler+ Utility's 3.0. Scala Architectural Scale also leads on review sentiment (87% vs 47%) and ads (none vs shown). Ruler+ Utility's advantage is iOS requirement (13.0 vs 15.6). On price, 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Ruler+ Utility sells 1 one-off in-app purchase and Scala Architectural Scale sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Scala Architectural Scale holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: Scala Architectural Scale has 24 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 47% of Ruler+ Utility's written reviews are positive against 87% of Scala Architectural Scale's.

UpkeepUpdate frequency

Ruler+ Utility ships an update every 40 months, Scala Architectural Scale every 4 months. The most recent releases landed on October 14, 2026 and October 23, 2026 respectively.

Scorecard7 real differences · 3 level
Ruler+ Utility versus Scala Architectural Scale: the parameters behind the verdict, then further details
ParameterRuler+ UtilityScala Architectural Scale
PriceFreeFree
Rating3.0 (2 ratings)4.6 (24 ratings) — better
Positive reviews46.7% of reviews86.7% of reviews — better
Number of ratings224 — better
Update frequencyEvery 40 monthsEvery 4 months — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS13.0 — better15.6
Further details — not scored
Size24 MB1 MB
Age rating4+4+
DeveloperKyungjin LeeNoerah Alvi

Customer experience

Ruler+ Utility

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews30 reviews
Positive46.7%
Neutral3.3%
Negative50.0%

Scala Architectural Scale

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

In-app purchases

1 purchases

Ruler+ Utility

One-time1
  • Remove Ads$1.99
1 purchases

Scala Architectural Scale

One-time1
  • Scala Full Version$2.99

Questions

Is Ruler+ Utility free?
Ruler+ Utility is free to download, with in-app purchases available.
Is Scala Architectural Scale free?
Scala Architectural Scale is free to download, with in-app purchases available.
Which has better reviews, Ruler+ Utility or Scala Architectural Scale?
Scala Architectural Scale is rated higher. Ruler+ Utility averages 3.0 out of 5 from 2 ratings, while Scala Architectural Scale averages 4.6 from 24 ratings.
Do Ruler+ Utility or Scala Architectural Scale have ads?
Ruler+ Utility shows ads; Scala Architectural Scale does not.
Which is updated more often, Ruler+ Utility or Scala Architectural Scale?
Ruler+ Utility ships an update every 40 months, and Scala Architectural Scale every 4 months. Most recently, Ruler+ Utility was updated on October 14, 2026 and Scala Architectural Scale on October 23, 2026.

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