Comparison

Custom Formulas 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

Custom Formulas

This utility app allows users to create and manage complex calculations with multiple inputs and outputs. Formulas can be linked, grouped into categories, and customized for display precision. Share your custom calculations easily via email.

Highlights
  • Multiple input/output formula support
  • Linked formulas via variable names
  • Formula categorization
  • Customizable variable display order
  • Adjustable output decimal precision
  • Email formula sharing
Features
Currently charting
Read full description

This app is easy to use, but unlike simpler apps, multiple entered values can be fed into multiple formulas and multiple output values can be displayed. The output of one formula in a group can be fed into the next by using the same variable name. Related formulas can be grouped into categories to make them easy to find. e.g. Maths formulas, Surveying formulas, Loan interest formulas etc. The order of variables displayed to the user can be changed, as can the number of decimal digits of precision shown in the output fields. You can easily share formulas with other users of the app by emailing them. Three example formulas are pre-installed with the app. In order of increasing complexity they are: slope percentage, compound interest, and point scale factor.

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

Custom Formulas4 screens
Formula Calculator #4 screens

Verdict

The call

The clearest difference is price: Formula Calculator # at Free against Custom Formulas's $3.99. Formula Calculator # also leads on iOS requirement (12.0 vs 15.4). Custom Formulas's advantage is in-app purchases (none vs 4) and ads (none vs shown). On rating, review sentiment, ratings volume 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

Formula Calculator # is free to download; Custom Formulas costs $3.99 up front. Formula Calculator # sells 4 one-off in-app purchases. Custom Formulas asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for Custom Formulas against 5.0 for Formula Calculator #. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews split almost evenly too, at 100% and 100% positive.

UpkeepUpdate frequency

Custom Formulas ships an update every 5 days, Formula Calculator # every 5 weeks. The most recent releases landed on September 18, 2026 and September 14, 2026 respectively.

Scorecard7 real differences · 4 level
Custom Formulas versus Formula Calculator #: the parameters behind the verdict, then further details
ParameterCustom FormulasFormula Calculator #
Price$3.99Free — better
Rating5.0 (1 ratings)5.0 (2 ratings)
Positive reviews100.0% of reviews100.0% of reviews
Number of ratings12 — better
Update frequencyEvery 5 days — betterEvery 5 weeks
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
Best chart rank#186 — better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.412.0 — better
Further details — not scored
Size1 MB67 MB
Age rating4+4+
DeveloperAnthony Dunk威 刘

Customer experience

Custom Formulas

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Formula Calculator #

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

In-app purchases

None

Custom Formulas

No in-app purchases

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 Custom Formulas free?
Custom Formulas costs $3.99, with no in-app purchases.
Is Formula Calculator # free?
Formula Calculator # is free to download, with in-app purchases available.
Which has better reviews, Custom Formulas or Formula Calculator #?
Custom Formulas and Formula Calculator # are both rated 5.0 out of 5 on the App Store, from 1 and 2 ratings respectively.
Do Custom Formulas or Formula Calculator # have ads?
Formula Calculator # shows ads; Custom Formulas does not.
Which is updated more often, Custom Formulas or Formula Calculator #?
Custom Formulas ships an update every 5 days, and Formula Calculator # every 5 weeks. Most recently, Custom Formulas was updated on September 18, 2026 and Formula Calculator # on September 14, 2026.

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