Comparison

ExtCalc vs Formula Calculator #

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

Head to head
About

ExtCalc

This scientific calculator offers a colorized text view for formulas, allowing for individual calculation sheets and easy memorization of results. It features a customizable constants pool, VAT calculator, and cloud synchronization for seamless use across devices. Accessibility and team collaboration are also emphasized.

Highlights
  • Colorized formula view
  • Individual calculation sheets
  • Memorize results
  • Customizable constants pool
  • VAT calculator
  • Cloud synchronization
  • Apple Watch app
Features
Read full description

ExtCalc is an innovative scientific calculator that makes operating computations easy. It shows your whole formula in a colorised text view. You can have different calculation sheets for different formulas or you just use one sheet for all your formulas. Deletion and memorizing results are integrated as well. Last, but not least, it includes a customizable constants pool and a VAT calculator. All nifty features in a short list: * Individual calculation sheets, with the possibility to print them * Color highlighting * Memorizing results, e.g. via the ANS button and through the calculation sheets, get old values by tapping on them in the sheet * Many functions, even in portrait mode * Grouping (brackets) * Error proof, you can't input formulas that would lead to errors * Constants pool, easily customizable * iCloud support for synchronization between devices * VAT calculator * Apple Watch app * Cloud synchronisation to stay up-to-date on all devices * AR scene * Print calculation sheets * Dark Mode * Strong focus on accessibility * SharePlay to work in a team Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy: https://develicious-studios.de/privacy.html

About

Formula Calculator #

Perform calculations with a vast library of built-in formulas or create your own. Save and sync custom formulas to the cloud for easy access across devices. Includes a comprehensive scientific calculator.

Highlights
  • Extensive built-in calculation formulas
  • Create and save custom formulas
  • Cloud synchronization for custom formulas
  • Share custom formulas with others
  • Comprehensive scientific calculator
Features
Read full description

The formula calculator comes with a wide range of built-in calculation formulas, allowing you to complete calculations simply by entering the required parameters. It also features built-in custom formulas, catering to individual needs. Once a custom formula is set up, you only need to input the parameters during your next calculation to quickly obtain the results, thereby improving efficiency. Moreover, you can share your custom formulas with friends or other devices for convenient calculations. After logging in with your account, you can synchronize your custom formulas to the cloud to prevent any loss. Additionally, it includes a comprehensive scientific calculator that meets various calculation needs.

Screenshots

ExtCalc4 screens
Formula Calculator #4 screens

Verdict

The call

The clearest difference is review sentiment: Formula Calculator # at 100% against ExtCalc's 0%. Formula Calculator # also leads on update cadence (every 5 weeks vs every 5 months) and iOS requirement (12.0 vs 18.7). ExtCalc's advantage is ads (none vs shown) and device support (6 vs 3). On price, in-app purchases and monetization model 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. ExtCalc sells 2 in-app purchases, starting at $4.99 per year and Formula Calculator # sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

ExtCalc ships an update every 5 months, Formula Calculator # every 5 weeks. The most recent releases landed on September 9, 2026 and September 14, 2026 respectively.

Scorecard5 real differences · 5 level
ExtCalc versus Formula Calculator #: the parameters behind the verdict, then further details
ParameterExtCalcFormula Calculator #
PriceFreeFree
Rating5.0 (2 ratings) — better
Positive reviews0.0% of reviews100.0% of reviews — better
Number of ratings2 — better
Update frequencyEvery 5 monthsEvery 5 weeks — better
AdsNo — betterYes
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, Mac, Apple TV, Apple Watch, Vision Pro — betteriPhone, iPad, iPod
Requires iOS18.712.0 — better
Further details — not scored
Size7 MB67 MB
Age rating4+4+
DeveloperMatthias Weber威 刘

Customer experience

ExtCalc

Written reviews1 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Formula Calculator #

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

2 purchases

ExtCalc

Subscriptions1
  • Yearly Subscription$4.991 Year
One-time1
  • Printing$0.99
4 purchases

Formula Calculator #

One-time4
  • 1 month subscription$1.49
  • 3 months subscription$2.49
  • 6 months subscription$3.49
Show 1 more
  • 1 year subscription$4.49

Questions

Is ExtCalc free?
ExtCalc is free to download, with in-app purchases available.
Is Formula Calculator # free?
Formula Calculator # is free to download, with in-app purchases available.
Do ExtCalc or Formula Calculator # have ads?
Formula Calculator # shows ads; ExtCalc does not.
Which is updated more often, ExtCalc or Formula Calculator #?
ExtCalc ships an update every 5 months, and Formula Calculator # every 5 weeks. Most recently, ExtCalc was updated on September 9, 2026 and Formula Calculator # on September 14, 2026.

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