Trigonometry Master vs OffLingua
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.
OffLingua
This app offers AI-powered, private offline translation for 55 languages directly on your device. It supports text, photo, and voice input with a refined interface and advanced on-device speech recognition. All translations are processed locally, ensuring your data never leaves your iPhone.
- Offline AI translation for 55 languages
- On-device text, photo, and voice translation
- Automatic OCR for photo translation
- Quick Translate Panel
- Encrypted local conversation history
- Transparent on-device performance indicators
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OffLingua is a powerful, privacy-first offline translation app that runs entirely on your iPhone, redesigned from the ground up to feel like a brand-new product while keeping its core promise intact: no internet, no uploads, no tracking. Powered by TranslateGemma 4B, Google DeepMind’s advanced open translation model running fully on-device, OffLingua delivers high-quality AI translation across 55 languages including English, Spanish, French, German, Chinese, Japanese, Arabic, and more, even in airplane mode or remote areas. The app supports multiple input methods in a refined, premium interface: instant text translation, photo translation with automatic OCR and improved overlay readability, and natural voice translation using on-device speech recognition. A clear three-mode navigation (Text, Speech, Photo) sits at the core of a new visual identity with modern typography, spacing, accent colors, intentional motion, and translation cards that offer clearer hierarchy, micro-feedback, inline “listen” actions, and smarter error states. New features elevate the experience further, including a Quick Translate Panel for one-tap translation, language swapping, live transcripts, speak and listen modes, and smooth translation streaming. Conversation history is stored locally in an encrypted database, allowing you to switch languages mid-conversation and resume any session from the sidebar. Transparent on-device performance indicators clearly show when the app is offline-ready or when the model is downloading, without exposing technical clutter. All translations happen 100% on your device. No cloud servers. No data collection. No tracking. Your text, voice, and photos never leave your iPhone, fully compliant with GDPR and global privacy standards. Download the AI model once on WiFi, then use OffLingua offline forever. Break language barriers without breaking your privacy.
Screenshots
Verdict
The clearest difference is review sentiment: OffLingua at 100% against Trigonometry Master's 50%. OffLingua also leads on update cadence (every 2 months vs every 10 months). Trigonometry Master's advantage is price ($12.99 vs $14.99) and device support (4 vs 1). On ads, in-app purchases and monetization model 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
Trigonometry Master costs $12.99 and OffLingua $14.99 up front. Neither carries in-app purchases, so what you see is what you pay.
Trigonometry Master ships an update every 10 months, OffLingua every 2 months. The most recent releases landed on November 6, 2026 and November 9, 2026 respectively.
| Parameter | Trigonometry Master | OffLingua |
|---|---|---|
| Price | $12.99 — better | $14.99 |
| Rating | 2.5 (2 ratings) — better | — |
| Positive reviews | 50.0% of reviews | 100.0% of reviews — better |
| Number of ratings | 2 — better | — |
| Update frequency | Every 10 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Paid | Paid |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone |
| Requires iOS | 11.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 12 MB | 8 MB |
| Age rating | 4+ | 4+ |
| Developer | Intemodino Group s.r.o. | R&D COPILOT SRL |
Customer experience
Trigonometry Master
OffLingua
In-app purchases
Trigonometry Master
No in-app purchases
OffLingua
No in-app purchases
Questions
Is Trigonometry Master free?
Is OffLingua free?
Do Trigonometry Master or OffLingua have ads?
Which is updated more often, Trigonometry Master or OffLingua?
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