Comparison

Tri vs Trigonometry Master

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

Head to head
About

Tri

This utility app provides the formula and value for calculating triangle properties. It's designed for quick access to mathematical formulas related to triangles.

Highlights
  • Triangle formula display
  • Value calculation
  • Quick access utility
  • Mathematical formulas
Features
Read full description

App to display a formula and value of a triangle.

About

Trigonometry Master

Easily calculate unknown sides, angles, area, and perimeter of any triangle. Supports both right and oblique triangles with visual input modes and adjustable decimal places for accuracy. Includes a history tape and email sharing for recent calculations.

Highlights
  • Solves right and oblique triangles
  • Calculates sides, angles, area, perimeter
  • Draws calculated triangles
  • Supports degrees and radians
  • Visual input modes
  • Adjustable decimal places
  • History tape and email results
Features
Read full description

Trigonometry Master is a easy to use app that allows you to quickly calculate unknown sides and angles of any triangle. It will also calculate the area and perimeter and draw the triangle. The app finds the sides, angles, area and perimeter of a triangle based on input parameters. - Right triangle: Enter two values, two sides or a side and an angle, tap Calculate and Trigonometry Master will find remaining values. - Oblique triangle: Enter three values, tap Calculate and Trigonometry Master will do the rest. Valid inputs: • three sides • two sides and an angle • two angles and a side Features: - Solves right triangles. - Solves oblique triangles. - Calculates unknown sides, angles, area and perimeter of a triangle. - Draws a calculated triangle with one click. - Supported angle units: degrees, radians. - 2 input modes based on the required level of visualisation: • Mode 1 (standard mode) - input fields are located above the triangle picture and linked with the picture through the names of sides and angles; • Mode 2 (more visualized mode) - input fields for sides and angles are located directly on the triangle picture so you can easily understand which parameter you are entering. - You can select the desired number of decimal places to adjust the accuracy of the results. - History tape to view your recent calculations. - Back and forward buttons to recall recent calculations. - Sends results and history via email. - 'Undo' for the Clear command. - 7 color schemes. - Portrait and landscape orientation.

Screenshots

Tri4 screens
Trigonometry Master4 screens

Verdict

The call

The clearest difference is review sentiment: Tri at 100% against Trigonometry Master's 50%. Tri also leads on price (Free vs $12.99) and rating (5.0 vs 2.5). Trigonometry Master's advantage is ads (none vs shown) and device support (4 vs 2). On ratings volume, update cadence and in-app purchases 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

Tri is free to download; Trigonometry Master costs $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Tri holds the better App Store score, 5.0 against 2.5. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 100% of Tri's written reviews are positive against 50% of Trigonometry Master's.

UpkeepUpdate frequency

Tri ships an update every 12 months, Trigonometry Master every 10 months. The most recent releases landed on September 16, 2026 and September 10, 2026 respectively.

Scorecard7 real differences · 3 level
Tri versus Trigonometry Master: the parameters behind the verdict, then further details
ParameterTriTrigonometry Master
PriceFree — better$12.99
Rating5.0 (1 ratings) — better2.5 (2 ratings)
Positive reviews100.0% of reviews — better50.0% of reviews
Number of ratings12 — better
Update frequencyEvery 12 monthsEvery 10 months — better
AdsYesNo — better
In-app purchasesNoNo
MonetizationAd-supported — betterPaid
DevicesiPhone, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.611.0 — better
Further details — not scored
Size4 MB12 MB
Age rating4+4+
DeveloperThirdware.jpIntemodino Group s.r.o.

Customer experience

Tri

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews4 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Trigonometry Master

All ratings2 ratings
Positive50.0%
Neutral0.0%
Negative50.0%
Written reviews6 reviews
Positive50.0%
Neutral0.0%
Negative50.0%

In-app purchases

None

Tri

No in-app purchases

None

Trigonometry Master

No in-app purchases

Questions

Is Tri free?
Tri is free to download, with no in-app purchases.
Is Trigonometry Master free?
Trigonometry Master costs $12.99, with no in-app purchases.
Which has better reviews, Tri or Trigonometry Master?
Tri is rated higher. Tri averages 5.0 out of 5 from 1 ratings, while Trigonometry Master averages 2.5 from 2 ratings.
Do Tri or Trigonometry Master have ads?
Tri shows ads; Trigonometry Master does not.
Which is updated more often, Tri or Trigonometry Master?
Tri ships an update every 12 months, and Trigonometry Master every 10 months. Most recently, Tri was updated on September 16, 2026 and Trigonometry Master on September 10, 2026.

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