Comparison

Convert 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

Convert

Perform common conversions for length, area, volume, angle, and scales with a modern, efficient interface. Save your preferences and access a history of calculations for quick retrieval. Customize the app's appearance to suit your style.

Highlights
  • Common unit conversions
  • Custom scale conversions
  • Saved conversion preferences
  • Conversion history
  • Customizable interface colors
  • Supports luminance conversions
Features
Read full description

With this application you can perform common conversions of length, area, volume, angle, between two scales, etc. in just a few clicks. Have it at hand will make good services! Especially as your conversion preferences are saved for even more efficiency. • Need a converter both modern and relevant? Do not miss Convert, an application that won't leave anyone indifferent! Indeed, thanks to a simple and effective esthetic, whether you are professional or individual, it will permit you to quickly perform complex conversions. • Why is it unique? That's not all! It also performs conversions of scales and luminance in a few clicks. In fact, it's a kind of pocket "kutch" that will help you for reading plans with, in addition, a management units. So you no longer have to think to know the size, in real meter, of 2.7in at 1:48 :) ​​Also, you can add your own custom scales! As for candela/in², Nit and Lambert, they will have no more secrets for you. • Even more? All your conversions are saved in a history available at all times. This classification system will permit you to quickly find your latest calculations. • The final word. Convert is customizable according to your wishes. Choose and change at any time the color of the interface to find the one that suits you best! In this new version, there is no more in-app purchase. After purchasing the application via the App Store, all the features are free!

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

Convert4 screens
Scala Architectural Scale4 screens

Verdict

The call

The clearest difference is rating: Convert at 5.0 against Scala Architectural Scale's 4.6. Convert also leads on update cadence (every 5 weeks vs every 4 months) and iOS requirement (8.0 vs 15.6). Scala Architectural Scale's advantage is review sentiment (87% vs 60%) and ratings volume (24 vs 1). On price, ads, in-app purchases 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. Convert sells 2 one-off in-app purchases 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

Convert holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Scala Architectural Scale has 24 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 60% of Convert's written reviews are positive against 87% of Scala Architectural Scale's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Convert ships an update every 5 weeks, Scala Architectural Scale every 4 months. The most recent releases landed on October 14, 2026 and October 26, 2026 respectively.

Scorecard5 real differences · 5 level
Convert versus Scala Architectural Scale: the parameters behind the verdict, then further details
ParameterConvertScala Architectural Scale
PriceFreeFree
Rating5.0 (1 ratings) — better4.6 (24 ratings)
Positive reviews60.0% of reviews86.7% of reviews — better
Number of ratings124 — better
Update frequencyEvery 5 weeks — betterEvery 4 months
AdsNoNo
In-app purchasesYesYes
MonetizationFreeFree
DevicesiPhone, iPad, iPod, Apple Watch — betteriPhone, iPad, iPod
Requires iOS8.0 — better15.6
Further details — not scored
Size14 MB1 MB
Age rating17+4+
DeveloperToutdanslapocheNoerah Alvi

Customer experience

Convert

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews15 reviews
Positive60.0%
Neutral6.7%
Negative33.3%

Scala Architectural Scale

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

In-app purchases

2 purchases

Convert

One-time2
  • Full Version$0.99
  • Premium Version$0.99
1 purchases

Scala Architectural Scale

One-time1
  • Scala Full Version$2.99

Questions

Is Convert free?
Convert 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, Convert or Scala Architectural Scale?
Convert is rated higher. Convert averages 5.0 out of 5 from 1 ratings, while Scala Architectural Scale averages 4.6 from 24 ratings.
Do Convert or Scala Architectural Scale have ads?
Neither Convert nor Scala Architectural Scale shows ads.
Which is updated more often, Convert or Scala Architectural Scale?
Convert ships an update every 5 weeks, and Scala Architectural Scale every 4 months. Most recently, Convert was updated on October 14, 2026 and Scala Architectural Scale on October 26, 2026.

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