Comparison

OmniCalc vs Conversion Calculator

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

Head to head
About

OmniCalc

This app offers a versatile calculator with a scrollable history for easy editing and instant results. It features date math, custom conversion calculators, and a personal math library for saving formulas and operations. Supports standard, scientific, and statistical calculations.

Highlights
  • Scrollable operation history
  • Instant result updates
  • Date math functions
  • Custom conversion calculators
  • Save formulas and history
  • Standard, Scientific, Statistical modes
Features
Read full description

Easy to use calculator that lets you scroll through your operations and make changes with instant results. Includes date math functions to easily add or subtract dates from each other. You can also add or subtract days from any date. • Rotate the iPhone/iPad to instantly swap between different calculators. • Annotate and save a series of operations to create your own conversion calculators. • Save formulas or operation history in your own math library. • Date Math is automatically detected in normal operations. Add or subtract dates from each other, add or subtract a number from any date. Includes: • Standard Calculator Functions • Scientific Calculator Functions • Statistical Calculator Functions • Date Math Calculator Functions

About

Conversion Calculator

Easily convert between metric and imperial units for weight, length, temperature, area, and time. This app offers precise, fast results with a clean interface, working offline for daily, travel, school, or work needs.

Highlights
  • Metric and imperial unit conversion
  • Weight, length, temperature, area, time
  • Offline functionality
  • Precise and fast results
  • Clean and minimal interface
  • Over 100 measurement types
Features
Read full description

Instantly Convert Units with Conversion Calculator - Metric Whether you're converting feet to meters, kg to lbs, or Celsius to Fahrenheit, the Conversion Calculator - Metric is the ultimate unit converter for daily, travel, school, or work use. This powerful and easy-to-use conversion app helps you switch between metric and imperial units effortlessly — from weight to length, temperature, area, and more. What You Can Convert: Weight: Instantly convert between kg and lbs, kilo, grams, and ounces Length: Convert feet to meters, inches, kilometers, and miles Temperature: Quick Celsius to Fahrenheit conversions and Kelvin Area: Convert square feet, square meters, and acres Time: Includes basic time converters for everyday needs With Conversion Calculator - Metric, you get precise, fast results no matter what you’re converting. Why Choose This Unit Converter All-in-one unit converter for over 100+ measurement types Accurate feet to meters, kg to lbs, and Celsius to Fahrenheit conversions Clean and minimal interface designed for ease and speed Works offline — no internet needed Supports both metric and imperial units for global compatibility From engineers to students to travelers, Conversion Calculator - Metric simplifies every kind of measurement conversion you need. Use Cases Planning a trip and need to switch from imperial to metric? Cooking a recipe that lists ingredients in lbs, but your scale shows kg? Doing a DIY project and stuck converting feet to meters? Working with temperatures and wondering what Celsius to Fahrenheit is? This conversion app handles it all. Download Now Get the best unit converter app available. With Conversion Calculator - Metric, you’ll convert weight, temperature, area, time, and length in seconds.

Screenshots

OmniCalc3 screens
Conversion Calculator4 screens

Verdict

The call

The clearest difference is in-app purchases: OmniCalc at none against Conversion Calculator's 1. OmniCalc also leads on iOS requirement (13.0 vs 17.0). Conversion Calculator's advantage is review sentiment (100% vs 72%). On price, rating, ratings volume and update cadence 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. Conversion Calculator sells 1 one-off in-app purchase. OmniCalc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 4.7 for OmniCalc against 4.8 for Conversion Calculator. Both are backed by a comparable volume of ratings — 72 and 157 respectively. Written reviews are what separate them: 72% of OmniCalc's written reviews are positive against 100% of Conversion Calculator's.

UpkeepUpdate frequency

OmniCalc ships an update every 2 months, Conversion Calculator every 5 weeks. The most recent releases landed on October 16, 2026 and October 14, 2026 respectively.

Scorecard4 real differences · 6 level
OmniCalc versus Conversion Calculator: the parameters behind the verdict, then further details
ParameterOmniCalcConversion Calculator
PriceFreeFree
Rating4.7 (72 ratings)4.8 (157 ratings) — better
Positive reviews71.9% of reviews100.0% of reviews — better
Number of ratings72157 — better
Update frequencyEvery 2 monthsEvery 5 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, Apple Watch
Requires iOS13.0 — better17.0
Further details — not scored
Size2 MB7 MB
Age rating4+4+
DeveloperJellyfilled StudiosCollins Cheruiyot

Customer experience

OmniCalc

All ratings72 ratings
Positive91.7%
Neutral5.6%
Negative2.8%
Written reviews32 reviews
Positive71.9%
Neutral9.4%
Negative18.8%

Conversion Calculator

All ratings157 ratings
Positive95.5%
Neutral3.2%
Negative1.3%
Written reviews6 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

OmniCalc

No in-app purchases

1 purchases

Conversion Calculator

One-time1
  • Unlimited access forever$8.99

Questions

Is OmniCalc free?
OmniCalc is free to download, with no in-app purchases.
Is Conversion Calculator free?
Conversion Calculator is free to download, with in-app purchases available.
Which has better reviews, OmniCalc or Conversion Calculator?
Conversion Calculator is rated higher. OmniCalc averages 4.7 out of 5 from 72 ratings, while Conversion Calculator averages 4.8 from 157 ratings.
Do OmniCalc or Conversion Calculator have ads?
Neither OmniCalc nor Conversion Calculator shows ads.
Which is updated more often, OmniCalc or Conversion Calculator?
OmniCalc ships an update every 2 months, and Conversion Calculator every 5 weeks. Most recently, OmniCalc was updated on October 16, 2026 and Conversion Calculator on October 14, 2026.

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