Comparison

E3BlueLight vs Ruler∘

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

Head to head
About

E3BlueLight

Features
Read full description

A household lighting intelligent control of the APP.Features include: control the light switch and group;According to the requirements in terms of stepless adjustment of brightness and color temperature.

About

Ruler∘

This app uses augmented reality to measure distances, lengths, heights, and angles with your device's camera. It offers various modes for accurate measurements on different surfaces and for small objects. Users can save their measurements directly to their camera roll.

Highlights
  • Augmented reality measurements
  • Measure distance, length, height, area, angles
  • Point and shoot measurement
  • Air Mode for linear measurement
  • Surface Locked for planes
  • Save measures to Camera Roll
Features
Read full description

Measure height, length, square, angle and more with your iPhone camera! Download now! Ruler AR uses Apple ARKit and augmented reality technology to bring you the full experience of a real tape measure right out of the box. Get the right measurement everytime by choosing the right tool for the job. • Point and shoot Aim the camera toward an object to measure • Air Mode Move phone from A to B like a tape measure • Surface Locked Restrict to surfaces like a floor or wall Features: - Light and easy to design - Measure distance, length, height, area, angles and more - Use plane detection or feature point focus - Measure in inches, meters, and centimeters - Sliders to measure small objects accurately - Save measures to Camera Roll SUBSCRIPTION PRICING AND TERMS Subscription Options: Premium Membership Monthly offers a $1.99/monthly, $0.99/weekly subscription for premium functionally and removing ads. * The price is for US customers. Pricing in other countries may vary and actual charges may be converted to your local currency depending on the country of residence. * Free trial automatically converts to a paid subscription unless canceled at least 24-hours before the end of the trial period. * Your subscription will automatically renew at the end of each term and your credit card will be charged through your iTunes account at confirmation of purchase. * Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal. * You can turn off auto-renew at any time from your iTunes account settings but refunds will not be provided for any unused portion of the term. The cancellation will take effect the day after the last day of the current subscription period, and you will be downgraded to the free service. Privacy Policy - https://sites.google.com/view/rulerar/privacy-policy Terms of Use - https://sites.google.com/view/rulerar/terms-of-use

Screenshots

E3BlueLight4 screens
Ruler∘4 screens

Verdict

The call

The clearest difference is update cadence: Ruler∘ at every 2 weeks against E3BlueLight's every 6 weeks. E3BlueLight's advantage is iOS requirement (13.0 vs 17.0). On price, ads, 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. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

E3BlueLight ships an update every 6 weeks, Ruler∘ every 2 weeks. The most recent releases landed on October 14, 2026 and October 3, 2026 respectively.

Scorecard2 real differences · 8 level
E3BlueLight versus Ruler∘: the parameters behind the verdict, then further details
ParameterE3BlueLightRuler∘
PriceFreeFree
Rating—4.4 (44 ratings) — better
Positive reviews—50.0% of reviews
Number of ratings—44 — better
Update frequencyEvery 6 weeksEvery 2 weeks — better
AdsNoNo
In-app purchasesNoNo
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad
Requires iOS13.0 — better17.0
Further details — not scored
Size9 MB8 MB
Age rating4+4+
Developer北京易方通达科技有限公司Andrei Shpileuski

In-app purchases

None

E3BlueLight

No in-app purchases

None

Ruler∘

No in-app purchases

Questions

Is E3BlueLight free?
E3BlueLight is free to download, with no in-app purchases.
Is Ruler∘ free?
Ruler∘ is free to download, with no in-app purchases.
Do E3BlueLight or Ruler∘ have ads?
Neither E3BlueLight nor Ruler∘ shows ads.
Which is updated more often, E3BlueLight or Ruler∘?
E3BlueLight ships an update every 6 weeks, and Ruler∘ every 2 weeks. Most recently, E3BlueLight was updated on October 14, 2026 and Ruler∘ on October 3, 2026.

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