Comparison

Visual Trig Func vs E

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

E

Organize and visualize information by joining round plates into rings. Add text, photos, videos, and illustrations to plates, then structure them into themes. Plates can be displayed in 3D and enlarged for presentations.

Highlights
  • Add media to round plates
  • Join plates into rings for themes
  • Structure plates by associating with other rings/plates
  • 3D plate display
  • Enlarge plates and flick through content
  • Presentation mode
  • Share via AirDrop
  • Import/export data via iTunes
Read full description

E-VOLVOX is an application that supports classification, organization and structuring of information. By joining rings to round plates you can multiply and therefore categorise and re-organise, or reduce cut off to create a different ring. It can also be re-structured by moving the layer of rings and plates. 〈The main features〉 ・You can add letters, photos, videos, handwritten letters and illustrations, etc. to a round shaped plate. ・The plates can be joined together into a ring, and one ring can be treated as one theme or topic. ・Each plate can be structured by associating to another ring or plate. ・The plate can become a 3D display, making it easier to understand the structure. ・You can exagerate the plate, so that a larger image can be displayed. Also, in the case of a ring, you can move to the next or previous plate by 'flicking'. A single sheet display can be made from any plate. ・As you can display the plate in a larger size and move to the next with a 'flick', you can also use this function to make a presentation. ・Using AirDrop, you can send not only plates, rings, boards, but also photos and text boxes. ・By exporting data, you can bring in data from iTunes. You can also load data retrieved from other terminals via iTunes. This application is developed in collaboration between Professor Hitoshi Nakagawa at The Open University of Japan) and Suzuki Educational Software Co., Ltd. ● For public Hitoshi Nakagawa (The Open University of Japan, Professor) Recently, various 'thinking' tools/ have been talked about, especially, mapping and Venn diagrams; simple things that are getting used often in class. However, there are not so many tools available for structural understanding of the upper and lower concepts, as this is hard to originate. Therefore, under the tablet terminal environment, we have developed and released applications that can be utilized for organization, classification, structuring and explanation of information in the class, from Suzuki Educational Software. Its name is "E-VOLVOX". VOLVOX is a green single-celled organism which forms free-swimming spherical colonies. It was named because this application resembles its shape and structure. It is possible to advance by trial and error in various learning situations, and it is also possible to present new forms of information and activities in a not related times series. More easy to explain in basic terms, but this is not a simple application. However, I believe you will have enough information to be useful to visualize and capture what we are thinking, and send it to the world. I Hope you will try it! [Please try it!]

Screenshots

Visual Trig Func4 screens

Verdict

The call

The clearest difference is price: Visual Trig Func at Free against E's $9.99. Visual Trig Func also leads on review sentiment (61% vs 33%) and device support (3 vs 1). E's advantage is in-app purchases (none vs 1) and ads (none vs shown). On 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

Visual Trig Func is free to download; E costs $9.99 up front. Visual Trig Func sells 1 one-off in-app purchase. E asks for nothing beyond the download.

UpkeepUpdate frequency

Visual Trig Func ships an update every 5 months, E every 3 months. The most recent releases landed on October 4, 2026 and June 4, 2026 respectively.

Scorecard7 real differences · 3 level
Visual Trig Func versus E: the parameters behind the verdict, then further details
ParameterVisual Trig FuncE
PriceFree — better$9.99
Rating1.0 (2 ratings) — better—
Positive reviews61.1% of reviews — better33.3% of reviews
Number of ratings2 — better—
Update frequencyEvery 5 monthsEvery 3 months — better
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPad, iPod — betteriPad
Requires iOS14.012.0 — better
Further details — not scored
Size4 MB174 MB
Age rating4+4+
DeveloperF-NET AppsSuzuki Educational Software Co.,Ltd.

Customer experience

Visual Trig Func

All ratings2 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews18 reviews
Positive61.1%
Neutral16.7%
Negative22.2%

E

Written reviews3 reviews
Positive33.3%
Neutral0.0%
Negative66.7%

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

E

No in-app purchases

Questions

Is Visual Trig Func free?
Visual Trig Func is free to download, with in-app purchases available.
Is E free?
E costs $9.99, with no in-app purchases.
Do Visual Trig Func or E have ads?
Visual Trig Func shows ads; E does not.
Which is updated more often, Visual Trig Func or E?
Visual Trig Func ships an update every 5 months, and E every 3 months. Most recently, Visual Trig Func was updated on October 4, 2026 and E on June 4, 2026.

Other comparisons