Comparison

Ruler vs SquareDox

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

Head to head
About

Ruler

This app displays various measurement scales for length, including meters and inches. It allows users to set magnification ratios and reduced scales for different applications. Users can calibrate the ruler and adjust PPI settings for accurate measurements.

Highlights
  • Display various measurement scales
  • Set magnification ratios
  • Set reduced scales
  • Measure in meters and inches
  • Free mode for custom scales
  • Calibration for accuracy
  • PPI setting
Features
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Scale Ruler is the simple application to display the scale of various measurement units. ※ Warning: - The accuracy of the scales cannot be guaranteed. - Calibration and PPI values ​​will be reset when the model changes. - Set the PPI value only when the model is undecided. - When you change the PPI value, perform calibration after the change. ■How to use: ■Select mode In UNLOCKED state, after choosing measurement unit, magnification ratio and reduced scale, the scale is displayed. ■Free mode When dragging the screen at UNLOCK, you can set the scale in the range 1: 1 to 1: 100. When you press and hold the scale value, the keyboard is displayed and you can enter the scale. You can lock the scale on the ruler with a switch. Sorry for the advertisement during unlocking. After In-App Purchase, your ads will no longer be displayed. Specification of Scale Ruler - measure length meter,inches - magnification ratio 50% , 70.7% , 100% , 141% , 200% - reduced scale  for meter    1:100 , 1:150 , 1:200 , 1:250 , 1:300 , 1:400 , 1:500 , 1:600  for inch   1:1 , 1:1.5 , 1:2 , 1:2.5 , 1:3 , 1:4 , 1:5 , 1:6  for inch(Architectural)   1:1 , 1:2 , 1:4 , 1:8 , 1:12 , 1:16 , 1:24 , 1:32 , 1:48 , 1:64   1:96 , 1:128 , 1:192 , 1:384  for inch(Engineering) 1:120 , 1:240 , 1:360 , 1:480 , 1:600 , 1:720 1:800 , 1:960 , 1:1080 ■ Settings - Calibration - PPI (pixels per inch) setting - In-app purchase (ads not displayed) - In-app purchase restoration ■ Calibration Adjust the length of the ruler. Use the correct ruler for adjustment. "Calibration" button: Records the adjusted state and reflects the calibration result on the ruler. "Reset" button: Returns the adjustment status to the specified value. It will not be recorded. "Initialize" button: Returns the adjustment status to the specified value and reflects it on the ruler. * Caution: The calibration value will be reset when the model changes. ■ PPI (pixels per inch) setting If the model is undecided, check the PPI value of the model before setting the PPI value. * Please set only when the model is undecided. "OK" button: Record the entered PPI value and reflect it on the ruler display. "Initialize" button: Returns the PPI value to the specified value and reflects it on the ruler. * Caution: The PPI value will be reset when the model changes.

About

SquareDox

Features
Read full description

SquareDox centralised content store across your entire organisation. Save your documents, drawings , medical images and other files in various formats. Your teams can now easily and securely access their work from any device – desktop or mobile . Squaredox can keep up with your organisation growth - May it be number of users or storage size. All your content is stored using leading security and encryption standards.

Screenshots

Ruler4 screens
SquareDox4 screens

Verdict

The call

The clearest difference is in-app purchases: SquareDox at none against Ruler's 1. SquareDox also leads on ads (none vs shown) and iOS requirement (12.4 vs 15.0). Ruler's advantage is update cadence (every 5 months vs every 27 months). On price 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 sells 1 one-off in-app purchase. SquareDox asks for nothing beyond the download.

UpkeepUpdate frequency

Ruler ships an update every 5 months, SquareDox every 27 months. The most recent releases landed on October 13, 2026 and September 24, 2026 respectively.

Scorecard4 real differences · 6 level
Ruler versus SquareDox: the parameters behind the verdict, then further details
ParameterRulerSquareDox
PriceFreeFree
Rating3.7 (3 ratings) — better—
Positive reviews63.0% of reviews—
Number of ratings3 — better—
Update frequencyEvery 5 months — betterEvery 27 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.012.4 — better
Further details — not scored
Size4 MB68 MB
Age rating4+4+
Developermitsunori oishiZen exim Pvt Ltd

In-app purchases

1 purchases

Ruler

One-time1
  • Hide Ads$0.99
None

SquareDox

No in-app purchases

Questions

Is Ruler free?
Ruler is free to download, with in-app purchases available.
Is SquareDox free?
SquareDox is free to download, with no in-app purchases.
Do Ruler or SquareDox have ads?
Ruler shows ads; SquareDox does not.
Which is updated more often, Ruler or SquareDox?
Ruler ships an update every 5 months, and SquareDox every 27 months. Most recently, Ruler was updated on October 13, 2026 and SquareDox on September 24, 2026.

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