Comparison

Right Angle vs HarbourLink InnoHub

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

Head to head
About

Right Angle

This app calculates triangles and segments of circles. It supports various angle input formats and offers solutions for oblique triangles and circle segments with optional add-ons. A right triangle calculator is included for free.

Highlights
  • Triangle solver
  • Circle segment calculator
  • Multiple angle units (degrees, radians, DMS, grade, x/12)
  • Oblique triangle solver (add-on)
  • Circle segment solver (add-on)
  • Free right triangle calculator
Features
Read full description

Right Angle is a calculator built for carpenters, builders, surveyors, machinists, and engineers — anyone who needs to solve a triangle, a trapezoid, or a circle without reaching for a notepad and the law of sines. Enter any valid combination of sides and angles and Right Angle solves the rest, including perimeter and area. The right triangle calculator is included for free; every other shape unlocks with a one-time Pro purchase or subscription. SHAPES • Right triangle (free) • Oblique triangle • Isosceles, right, and general trapezoids • Full circle — enter radius, diameter, or circumference • Segment of a circle ANGLE FORMATS • Decimal degrees • Radians • Degrees / minutes / seconds (DMS) • Percent grade • Pitch (x-over-12) LENGTH FORMATS • Decimal — the original, unitless entry. Best for metric. • Feet, inches & fractions — type values like 2' 5 1/2". • Inches & fractions — type values like 40 1/2". Pick a fraction precision from 1/2 down to 1/64 inch. Inputs and outputs both use the format you choose, and you can switch any time from Settings. DESIGNED FOR THE JOB SITE • A custom on-screen keyboard puts the symbols you need — feet, inches, fraction slash, degree, prime, double-prime — one tap away. • Helpful errors when an input combination can't be solved, instead of silent failures. • Available in English and Spanish — iOS picks the language to match your device. • Full VoiceOver support across the keyboard, input fields, shape diagrams, and results. Animations respect the Reduce Motion setting. EULA: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy policy: http://rightangleapp.com/privacy.html

About

HarbourLink InnoHub

Features
Read full description

Unlock a world of digital convenience at your fingertips with HBL app. Your one stop platform to Live, Work, Play at HBL. Key Features: • Enjoy Cardless Access In-app digital access using QR code for access within the development. • Visitor Management Provide your guest with fuss-free access ahead of time by sending a web-link invite for a seamless visitation experience. • Facilities Booking Book facility on-the-go in just a few easy taps. • Notices and Updates Stay connected with the latest news and announcement of the development. Access to everyday convenience with HBL app now!

Screenshots

Right Angle4 screens
HarbourLink InnoHub4 screens

Verdict

The call

The clearest difference is in-app purchases: HarbourLink InnoHub at none against Right Angle's 9. HarbourLink InnoHub also leads on iOS requirement (16.6 vs 26.0). Right Angle's advantage is update cadence (every 6 days vs every 4 weeks). On price, ads 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. Right Angle sells 9 in-app purchases, starting at $2.99 per month. HarbourLink InnoHub asks for nothing beyond the download.

UpkeepUpdate frequency

Right Angle ships an update every 6 days, HarbourLink InnoHub every 4 weeks. The most recent releases landed on October 19, 2026 and October 4, 2026 respectively.

Scorecard3 real differences · 7 level
Right Angle versus HarbourLink InnoHub: the parameters behind the verdict, then further details
ParameterRight AngleHarbourLink InnoHub
PriceFreeFree
Rating3.9 (30 ratings) — better—
Positive reviews73.3% of reviews—
Number of ratings30 — better—
Update frequencyEvery 6 days — betterEvery 4 weeks
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS26.016.6 — better
Further details — not scored
Size3 MB14 MB
Age rating4+4+
DeveloperJerry MayersHABITAP PTE. LTD

Bugs and requests

Right Angle

Reported bugs

5 issues
  • App crashes after startup
  • Update caused app to crash
  • Loss of previously purchased unlocked app
  • Keyboard covers input fields
  • App changes mm to unspecified units

Requested features

9 requests
  • Restore fraction support
  • Restore feet and inches support
  • Provide both angles of a right triangle
  • Allow scrolling or hiding the keyboard
  • Bundling with other tools
Show 4 more
  • Add metric units (millimeters)
  • Option to choose metric inputs
  • Dark mode option
  • Advanced analytics dashboard

HarbourLink InnoHub

Not enough reviews yet to summarise bugs or requests.

In-app purchases

9 purchases

Right Angle

Subscriptions2
  • Renews Monthly14 Days trial$2.991 Month
  • Renews Yearly1 Month trial$14.991 Year
One-time7
  • Small Tip$2.99
  • Medium Tip$4.99
  • Segments Calculator$5.99
Show 4 more
  • Oblique Triangle Calculator$5.99
  • Segment & Oblique Triangle$6.99
  • Large Tip$9.99
  • Huge Tip$29.99
None

HarbourLink InnoHub

No in-app purchases

Questions

Is Right Angle free?
Right Angle is free to download, with in-app purchases available.
Is HarbourLink InnoHub free?
HarbourLink InnoHub is free to download, with no in-app purchases.
Do Right Angle or HarbourLink InnoHub have ads?
Neither Right Angle nor HarbourLink InnoHub shows ads.
Which is updated more often, Right Angle or HarbourLink InnoHub?
Right Angle ships an update every 6 days, and HarbourLink InnoHub every 4 weeks. Most recently, Right Angle was updated on October 19, 2026 and HarbourLink InnoHub on October 4, 2026.

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