Comparison

LumiGuide vs Construction Calculator

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

Head to head
About

LumiGuide

Features
Read full description

LumiGuide: Your Ultimate Safety and Exploration Companion LumiGuide, developed by Contrivity Solutions Inc., is a reliable flashlight and safety app designed for personal safety, navigation, and emergency preparedness. It features a powerful flashlight, strobe effects, SOS signaling with Morse code, compass, location sharing, battery optimization, and more. Free and Paid Versions: LumiGuide offers both free and paid versions with additional features for premium users. The paid version requires account creation, prioritizing privacy. Features: Adjustable Flashlight: Illuminate surroundings with adjustable brightness. Strobe Effect: Add excitement with customizable strobe effects. SOS Signaling: Signal for help using Morse code in emergencies. Emergency Contacts Notification (Paid): Alerts designated contacts with your information. Screen Light: Use your phone screen as a reliable light source. Built-in Compass: Access a compass for navigation during outdoor activities. Coordinates and Altitude: Display real-time coordinates and altitude information. Location Sharing: Share your location for safety and communication. Battery Optimization: Optimize battery usage based on device status. Morse Code Features: Manual Morse code and text to Morse code (Paid). Tech-Savvy Solutions: Innovative features for tech-savvy users. Ad-Free Version: Enjoy an uninterrupted experience with the ad-free version. User-Friendly Interface: Navigate effortlessly with a smooth interface. Account Cancellation and Deletion: Users have control over account management. Ideal Users: Families: Ensure safety with location sharing and emergency features. Students: Navigate campuses and urban areas efficiently. Outdoor Enthusiasts: Use compass, maps, and location-sharing for outdoor activities. Nighttime Joggers and Walkers: Ensure visibility and safety during low-light conditions. Travelers and Commuters: Navigate unfamiliar locations with maps and directions. Emergency Preparedness Advocates: Prioritize safety with SOS and emergency features. Tech-Savvy Users: Appreciate Morse code communication and innovative features. Newcomers and Travelers: Enhance safety and convenience in unfamiliar surroundings. LumiGuide empowers users with a comprehensive set of tools, ensuring personal safety, adventure, and peace of mind in various situations. Terms of use link: https://www.contrivity.ca/termsofuse

About

Construction Calculator

This app provides a comprehensive suite of tools for construction professionals and DIY enthusiasts. It offers precise calculations for decking, roofing, stairs, concrete, and more, with support for both metric and imperial units. Designed for jobsite use, it works offline and provides clear visuals for accurate on-site measurements.

Highlights
  • Decking and flooring calculations
  • Roofing material and coverage estimators
  • Stair and stringer rise/run calculations
  • Concrete, asphalt, and gravel volume estimators
  • Slope, pitch, and angle framing helpers
  • Unit converter with mixed-unit support
  • Offline functionality
Read full description

Build faster, measure smarter. Pro² is a complete construction calculator for decking, roofing, concrete, stairs, framing and precise on-site measurements. It’s made for builders, carpenters, contractors and serious DIY who need accurate answers in seconds. DECKING & FLOORING • Area, board runs, spacing and waste allowance • Material takeoff for boards and joists ROOFING (METAL & TILE) • Coverage and sheet/tile counts • Overhangs, pitch, angle and rafter length helpers STAIRS & STRINGERS • Rise/run, slope %, angle (°) and stringer length • Clear breakdowns and step-by-step visuals BALUSTERS, RAILING & EVEN SPACING • Perfect marks from 0 to full length • Spacing tables for clean, consistent layouts CONCRETE, ASPHALT, GRAVEL & SOIL • Volume estimators for slabs, pads, footings and fills • Smart rounding for real-world quantities SLOPE, PITCH & ANGLES • Fast framing helpers for cuts and layout • Metric and imperial support in every tool UNIT CONVERTER • Length, area, volume, density and weight • Built for mixed-unit jobs (mm, ft, inches) QUICK CALCULATOR • Running history with one-tap copy/share MADE FOR THE JOBSITE • Fraction support and practical defaults • Works fully offline—no signal required • Clean visuals that stay readable outdoors WHY PROS USE PRO² • One app instead of juggling multiple separate tools • Accurate results, simple inputs and clear diagrams • New tools and improvements arrive regularly based on user feedback Pro² is built for professional construction, carpentry, decking, roofing and framing work—yet intuitive enough for DIY home projects. Upgrade to unlock additional tools and advanced features when you’re ready to grow your toolkit. SUBSCRIPTION TERMS • Carpenter Pro is an optional auto-renewing subscription with Weekly and Annual plans. • A 3-day free trial is available on the Annual plan. • Payment is charged to your Apple ID and subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. • You can manage or cancel your subscription in your App Store account settings. • Lifetime is a one-time purchase and does not auto-renew. • The localized price is shown in-app before you confirm. Terms of Use (Apple EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://shapkin.dev/apps/carpenter/privacy.html

Screenshots

LumiGuide4 screens
Construction Calculator4 screens

Verdict

The call

The clearest difference is update cadence: LumiGuide at every 2 days against Construction Calculator's every 2 weeks. LumiGuide also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On price, ads and in-app purchases 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. LumiGuide sells 2 in-app purchases, starting at $1.99 per month and Construction Calculator sells 15 in-app purchases, starting at $2.99 per 7 days. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

LumiGuide ships an update every 2 days, Construction Calculator every 2 weeks. The most recent releases landed on October 27, 2026 and October 30, 2026 respectively.

Scorecard3 real differences · 7 level
LumiGuide versus Construction Calculator: the parameters behind the verdict, then further details
ParameterLumiGuideConstruction Calculator
PriceFreeFree
Rating—4.8 (24 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—24 — better
Update frequencyEvery 2 days — betterEvery 2 weeks
AdsNoNo
In-app purchasesYesYes
Monetization—Free with in-app purchases
DevicesiPhone, iPad, iPod — betteriPhone
Requires iOS13.0 — better18.0
Further details — not scored
Size29 MB62 MB
Age rating17+4+
DeveloperContrivity SolutionsShapkin Dev

In-app purchases

2 purchases

LumiGuide

Subscriptions1
  • Flashlight Pro Monthly Sub.$1.991 Month
One-time1
  • LumiGuide Ad Free Version$0.99
15 purchases

Construction Calculator

Subscriptions4
  • Carpenter PRO - Weekly$2.997 Days
  • Full Access — Weekly$5.997 Days
  • Carpenter PRO — Annual3 Days trial$19.991 Year
Show 1 more
  • Full Access — Annual3 Days trial$39.991 Year
One-time11
  • RL Level & Benchmark Calculator$3.99
  • Gravel Volume Calculator$3.99
  • Stair Stringer & Rise Run Calc$3.99
Show 8 more
  • Soil Excavation Volume Calculator$3.99
  • Asphalt Tonnage Calculator$3.99
  • Right Triangle & Pitch Calculator$3.99
  • Running Measurements Calculator$3.99
  • Unit Converter: Feet & Metric$3.99
  • Paint Area Coverage Estimator$3.99
  • Lifetime Access$39.99
  • Lifetime Access$79.99

Questions

Is LumiGuide free?
LumiGuide is free to download, with in-app purchases available.
Is Construction Calculator free?
Construction Calculator is free to download, with in-app purchases available.
Do LumiGuide or Construction Calculator have ads?
Neither LumiGuide nor Construction Calculator shows ads.
Which is updated more often, LumiGuide or Construction Calculator?
LumiGuide ships an update every 2 days, and Construction Calculator every 2 weeks. Most recently, LumiGuide was updated on October 27, 2026 and Construction Calculator on October 30, 2026.

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