Comparison

Ross Optical Calculator vs Conv3rtify

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

Head to head
About

Ross Optical Calculator

This utility app provides a comprehensive calculator for a variety of optical equations. It is designed for ease of use, making complex calculations accessible on your mobile device.

Highlights
  • Optical equation calculator
  • Wide range of equations
  • Easy to use interface
  • Mobile accessibility
Features
Read full description

A mobile app calculator with a wide range of optic equations, made easy for you to use.

About

Conv3rtify

Features
Read full description

Conv3rtify is a powerful universal unit conversion tool that will make your life easier. In the app you'll find 3 main sections: - Standard, with some basic units (length, area, volume, mass, angle, time, etc.) - Pro, with more advanced and specific ones (colors, currency, base, and temperature conversion systems) - Favorites, where you can save the units you use the most — Pro features are available only with the Conv3rtify+ program. Upgrade to Conv3rtify+ to remove ads & unlock all the powerful capabilities of the app. It's a 1-time paying program: you pay once and you're able to use your app at 100% forever. When our team will come up with new cool features, you'll simply need to enjoy them and you won't be obliged to pay another time. — Conv3rtify also allows users to choose between 2 different themes: light and dark mode. There is even the possibility to select an automatic mode that will change the app's theme based on the device's theme.

Screenshots

Ross Optical Calculator4 screens
Conv3rtify4 screens

Verdict

The call

The clearest difference is in-app purchases: Ross Optical Calculator at none against Conv3rtify's 1. Ross Optical Calculator also leads on update cadence (every 6 weeks vs every 26 months) and iOS requirement (12.4 vs 15.1). 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. Conv3rtify sells 1 one-off in-app purchase. Ross Optical Calculator asks for nothing beyond the download.

UpkeepUpdate frequency

Ross Optical Calculator ships an update every 6 weeks, Conv3rtify every 26 months. The most recent releases landed on June 6, 2026 and September 15, 2026 respectively.

Scorecard3 real differences · 6 level
Ross Optical Calculator versus Conv3rtify: the parameters behind the verdict, then further details
ParameterRoss Optical CalculatorConv3rtify
PriceFreeFree
Rating5.0 (3 ratings) — better—
Number of ratings3 — better—
Update frequencyEvery 6 weeks — betterEvery 26 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS12.4 — better15.1
Further details — not scored
Size12 MB40 MB
Age rating4+4+
DeveloperRoss OpticalIlya Emeliyanov

In-app purchases

None

Ross Optical Calculator

No in-app purchases

1 purchases

Conv3rtify

One-time1
  • Conv3rtify+$2.99

Questions

Is Ross Optical Calculator free?
Ross Optical Calculator is free to download, with no in-app purchases.
Is Conv3rtify free?
Conv3rtify is free to download, with in-app purchases available.
Do Ross Optical Calculator or Conv3rtify have ads?
Neither Ross Optical Calculator nor Conv3rtify shows ads.
Which is updated more often, Ross Optical Calculator or Conv3rtify?
Ross Optical Calculator ships an update every 6 weeks, and Conv3rtify every 26 months. Most recently, Ross Optical Calculator was updated on June 6, 2026 and Conv3rtify on September 15, 2026.

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