Trigonometry Master vs e
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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.
e
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e-stant GO allows you to manage and control esse-ti's devices in real-time. With an intuitive interface, this app enables you to maximize efficiency and monitor the status of your devices without the need for any cables or a computer. Key features: - Simple configuration: easily connect your device via Bluetooth. - Real-time monitoring: instantly view the device status, active alarms, ongoing communication, and other crucial parameters. - Parameter management: quickly and intuitively modify and update device parameters, customizing settings according to your needs. * esse-ti compatible hardware is required
Screenshots
Verdict
The clearest difference is price: e at Free against Trigonometry Master's $12.99. e also leads on update cadence (fortnightly vs every 10 months). Trigonometry Master's advantage is device support (4 vs 2) and iOS requirement (11.0 vs 16.0). On ads 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
e is free to download; Trigonometry Master costs $12.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Trigonometry Master ships an update every 10 months, e fortnightly. The most recent releases landed on September 10, 2026 and May 16, 2026 respectively.
| Parameter | Trigonometry Master | e |
|---|---|---|
| Price | $12.99 | Free — better |
| Rating | 2.5 (2 ratings) — better | — |
| Positive reviews | 50.0% of reviews | — |
| Number of ratings | 2 — better | — |
| Update frequency | Every 10 months | Fortnightly — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | — |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.0 |
| Further details — not scored | ||
| Size | 12 MB | 73 MB |
| Age rating | 4+ | 4+ |
| Developer | Intemodino Group s.r.o. | Esse-ti srl |
In-app purchases
Trigonometry Master
No in-app purchases
e
No in-app purchases









