Comparison

Visual Trig Func vs Heron's Formula Calculator

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

Head to head
About

Visual Trig Func

This app visually demonstrates trigonometric functions, making them easier to understand and calculate. It offers interactive tools for exploring values, viewing wave graphs, and accessing lists of trigonometric ratios. Ideal for students and educators seeking a clearer grasp of trigonometry.

Highlights
  • Visual trigonometric functions
  • Interactive radius and angle manipulation
  • Comprehensive lists of trig ratios
  • Wave graph visualizations
  • Adjustable values via text fields
  • Tap-to-check degree and value functionality
Features
Read full description

Do you know trigonometric functions? Or want to learn it? Generally it makes people to be complicated a little, but if you use Trig Func, this will help you to more easily understand! Also this app is easy/quick to confirm the value of trig functions, so I wish this is really useful for students, teachers, developers and more! *** Features *** - Visual trig functions! - Comfortable moving for calculations! - Great lists(sin,cos,tan,csc,sec,cot) - Images for the wave graphs *** How to use it *** [ Calc ] You can drag a radius line between 0 to 90 degrees, and if you do that, it will move to be based on "Radius" and "Angle". Also you can set any numbers up to text fields with segmented buttons. Such as if you edit Text1 with "X" button and Text2 with "Y" button, the triangle view will change to be based on "X" and "Y". Which means, there are 6 cases. ( Radius - Angle ) ( Radius - X ) ( Radius - Y ) ( Angle - X ) ( Angle - Y ) ( X - Y ) [ List ] No need to explain about it. Just scroll it. Oh, wait. You can change these values if you tap column names, like below... Degrees --- Radian sin --- csc(cosec) cos --- sec tan --- cot [ Wave ] There are 2 graphs, so if you tap the button of bottom right, the graph will change another one. (sin, cos, tan) --- (csc, sec, cot) Also you can tap anywhere for checking degrees and values. I hope this app helps you, even a little bit.

About

Heron's Formula Calculator

Calculate the area of any triangle using only the lengths of its three sides. Simply input the side lengths and get an instant result.

Highlights
  • Calculate triangle area
  • Input three side lengths
  • Instant calculation results
  • Simple user interface
Features
Read full description

Heron's formula is a calculator that can calculate the area of a triangle from the length of three sides. Enter the lengths a, b, and c of the three sides and press the calculation button. Then the calculation result will appear.

Screenshots

Visual Trig Func4 screens
Heron's Formula Calculator3 screens

Verdict

The call

The clearest difference is price: Visual Trig Func at Free against Heron's Formula Calculator's $2.99. Visual Trig Func also leads on update cadence (every 5 months vs every 12 months) and iOS requirement (14.0 vs 16.0). Heron's Formula Calculator's advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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

Visual Trig Func is free to download; Heron's Formula Calculator costs $2.99 up front. Visual Trig Func sells 1 one-off in-app purchase. Heron's Formula Calculator asks for nothing beyond the download.

UpkeepUpdate frequency

Visual Trig Func ships an update every 5 months, Heron's Formula Calculator every 12 months. The most recent releases landed on June 1, 2026 and September 23, 2026 respectively.

Scorecard6 real differences · 4 level
Visual Trig Func versus Heron's Formula Calculator: the parameters behind the verdict, then further details
ParameterVisual Trig FuncHeron's Formula Calculator
PriceFree — better$2.99
Rating1.0 (2 ratings) — better—
Positive reviews61.1% of reviews—
Number of ratings2 — better—
Update frequencyEvery 5 months — betterEvery 12 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS14.0 — better16.0
Further details — not scored
Size4 MB3 MB
Age rating4+4+
Developeryukihiro fujitakotobaz

In-app purchases

1 purchases

Visual Trig Func

One-time1
  • [ Add Calculation 360! ] (You can calc trig functions for over 90 degrees.)$0.99
None

Heron's Formula Calculator

No in-app purchases

Questions

Is Visual Trig Func free?
Visual Trig Func is free to download, with in-app purchases available.
Is Heron's Formula Calculator free?
Heron's Formula Calculator costs $2.99, with no in-app purchases.
Do Visual Trig Func or Heron's Formula Calculator have ads?
Visual Trig Func shows ads; Heron's Formula Calculator does not.
Which is updated more often, Visual Trig Func or Heron's Formula Calculator?
Visual Trig Func ships an update every 5 months, and Heron's Formula Calculator every 12 months. Most recently, Visual Trig Func was updated on June 1, 2026 and Heron's Formula Calculator on September 23, 2026.

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