Comparison

Fomcal vs Triangle Calc A

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

Head to head
About

Fomcal

This app allows you to create and save custom calculation formulas for daily use. It supports complex functions, logical operations, and parameter studies, with options to export results as CSV. An optional numeric pad enhances input efficiency.

Highlights
  • Save and reuse custom formulas
  • Support for logical and comparison functions
  • Parameter study for variable analysis
  • Export results as CSV
  • Optional enhanced numeric pad
  • Extended syntax for branching and iteration
Features
Read full description

Fomcal is a calculator to calculate quickly with formula inputted already. Since you can register formulas used in daily routine by yourself, there is no need to search or to develop the dedicated calc app. Moreover, Fomcal can be also available as a general function calculator pad (option). Registered formula can be utilized as a function in the other formula or on the calcpad. And constants or variables can be used in these. Fomcal can show descriptions and a figure, about formulas and variables. In addition to the numeric functions such as trigonometric functions, you can also use the logical or comparison functions. By describing separated multiple of a formula with a semicolon';', you will be able to calculate these at the same time. Temporary variables are available in formula definition as followings. exp) x=1;x+2 result) 3 You can try a parameter study with specifying an initial value, a incrementation and a repeat number. The result can be exported as CSV data. Following formulas are preset as samples. ・Hypotenuse of Right Triangle - Geometry ・Cross-sectional Performance of Rectangle - Mechanics of materials ・Roots of quadratic equation - Mathematics ・Compound interest calculation - Business ・Number of years to become N times with compound interest calculation After purchase of "Enhancements (former Restriction Release)" with In-App purchase, you will be able to following functions. ・Export/import of formula data. ・A special numeric pad will be utilized for efficient inputting. ・Function calculator pad. ・Parameter study. From Ver.3.3, "Extended Syntax" feature is available. With $IF, $FOR, $WHILE or etc., branch or iterative operation is easily specified.

About

Triangle Calc A

Features
Read full description

The fastest way to solve Right Triangles. Triangle Calc A is a minimalist and specialized tool for anyone who needs instant, accurate right triangle calculations. Designed for speed and precision, it eliminates complex menus so you can focus on your work. Key Features: ■ Specialized for Right Triangles: Just enter two known values to solve the rest:  ・Two sides (Pythagorean theorem)  ・One side and one angle (Trigonometry) ■ Instant Results: Get all sides, angles, Area, and Perimeter immediately. ■ Minimalist Interface: No distractions. Open the app, enter your numbers, and get the answer in seconds. ■ Professional Precision: High-accuracy calculations for engineering, construction, and education. Perfect for: ■ Construction & Carpentry: Calculating pitches, slopes, and framing layouts. ■ Engineering: Quick geometric verification on-site. ■ Education: A reliable companion for trigonometry homework.

Screenshots

Fomcal4 screens
Triangle Calc A3 screens

Verdict

The call

The clearest difference is in-app purchases: Triangle Calc A at none against Fomcal's 1. Triangle Calc A also leads on price ($0.99 vs $1.99). Fomcal's advantage is update cadence (every 3 months vs every 56 months) and iOS requirement (12.0 vs 26.0). On 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

Fomcal costs $1.99 and Triangle Calc A $0.99 up front. Fomcal sells 1 one-off in-app purchase. Triangle Calc A asks for nothing beyond the download.

UpkeepUpdate frequency

Fomcal ships an update every 3 months, Triangle Calc A every 56 months. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

Scorecard4 real differences · 4 level
Fomcal versus Triangle Calc A: the parameters behind the verdict, then further details
ParameterFomcalTriangle Calc A
Price$1.99$0.99 — better
Positive reviews75.0% of reviews—
Update frequencyEvery 3 months — betterEvery 56 months
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS12.0 — better26.0
Further details — not scored
Size6 MB0 MB
Age rating4+4+
DeveloperNOBORU IMAIkohei yamane

In-app purchases

1 purchases

Fomcal

One-time1
  • Enhancements$1.99
None

Triangle Calc A

No in-app purchases

Questions

Is Fomcal free?
Fomcal costs $1.99, and also offers in-app purchases.
Is Triangle Calc A free?
Triangle Calc A costs $0.99, with no in-app purchases.
Do Fomcal or Triangle Calc A have ads?
Neither Fomcal nor Triangle Calc A shows ads.
Which is updated more often, Fomcal or Triangle Calc A?
Fomcal ships an update every 3 months, and Triangle Calc A every 56 months. Most recently, Fomcal was updated on November 1, 2026 and Triangle Calc A on October 27, 2026.

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