Comparison

Fraction Calculator vs Opterra Cortex

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

Head to head
About

Fraction Calculator

This tool converts between decimals and fractions, and also handles unit conversions for construction and metric measurements. It offers an intuitive interface for calculations and editing, with advanced features available through upgrades.

Highlights
  • Decimal to fraction conversion
  • Fraction to decimal conversion
  • Unit conversion (feet, inches, metric)
  • Simultaneous equation and result display
  • Advanced editing capabilities
  • Today Screen integration
Features
Read full description

Award winning Feet Inch Fraction Calculator & Metric converter for iPhone and iPad. Designed with simplicity, usability and beauty in mind! FEATURES: - Elegant & Intuitive interface - Decimal to fraction converter - Fraction to decimal conversion - Displays both the equation & the result at the same time - Advanced editing by easily going back and forth - Can be added to Today Screen Ideal for those who work in construction, woodworking and for students to check up their homework! If you are looking for more advanced features you can upgrade to one or more of the following: - Present Fractions (1/2" through 1/64") - Work in and convert between all building dimensional formats: feet-inch-fractions, inch fraction, yards, decimal feet (10th, 100th), decimal inches and metric (km, m, cm, mm) - Multiple themes to choose from Enjoy the FREE Fraction calculator with, no ads, no prompts & if you like it, support us by upgrading or giving us a positive review. Thanks :) Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Opterra Cortex

Features
Read full description

Opterra Cortex is your field service toolkit. Assess water heaters and assets on-site, capture inspection photos, and send professional health reports to homeowners — right from your phone. Walk up to any unit, enter what you see, and get an instant health score with clear recommendations you can share on the spot. No paperwork, no waiting. Track every property, customer, and piece of equipment you service in one place. Review past assessments, log maintenance, and pick up where you left off — even without cell service. Your work syncs automatically when you're back online. Focus on the job, not the app. Requires an organization account. Ask your admin to set up your login on their Cortex Dashboard.

Screenshots

Fraction Calculator1 screens
Opterra Cortex3 screens

Verdict

The call

The clearest difference is in-app purchases: Opterra Cortex at none against Fraction Calculator's 5. On price, ads, device support and iOS requirement 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. Fraction Calculator sells 5 in-app purchases, starting at $4.99 per month. Opterra Cortex asks for nothing beyond the download.

Scorecard1 real difference · 9 level
Fraction Calculator versus Opterra Cortex: the parameters behind the verdict, then further details
ParameterFraction CalculatorOpterra Cortex
PriceFreeFree
Rating4.7 (157 ratings) — better—
Positive reviews75.0% of reviews—
Number of ratings157 — better—
Update frequencyMonthly—
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad — betteriPhone
Requires iOS16.416.0 — better
Further details — not scored
Size41 MB35 MB
Age rating4+4+
DeveloperxNeat.comEvan Graven

Bugs and requests

Fraction Calculator

Reported bugs

8 issues
  • App crashes on opening (iPad)
  • Crashes when using plus buttons (iPad)
  • Syntax errors during fraction calculations
  • App closes immediately upon opening
  • Unwanted decimal points in fraction results
Show 3 more
  • Duplicate app installations that won't delete
  • Tutorial buttons not functioning properly
  • Unresponsive UI elements

Requested features

7 requests
  • Save calculations for later use
  • Support for sixths and twelfths (for typography/design)
  • Reorganizable or customizable unit lists
  • Full fraction support on Apple Watch
  • Free trial period before requiring subscription
Show 2 more
  • Ability to disable unused units to reduce scrolling
  • Integration into main Calculator+ app instead of separate app

Opterra Cortex

Not enough reviews yet to summarise bugs or requests.

In-app purchases

5 purchases

Fraction Calculator

Subscriptions2
  • Fraction Calculator3 Days trial$4.991 Month
  • Fraction Calculator7 Days trial$39.991 Year
One-time3
  • Fraction Calculator Pro$0.99
  • Fraction Calculator$3.99
  • Fraction Calculator Plus$4.99
None

Opterra Cortex

No in-app purchases

Questions

Is Fraction Calculator free?
Fraction Calculator is free to download, with in-app purchases available.
Is Opterra Cortex free?
Opterra Cortex is free to download, with no in-app purchases.
Do Fraction Calculator or Opterra Cortex have ads?
Neither Fraction Calculator nor Opterra Cortex shows ads.

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