# TrigIt vs IELTS Test Prep

The clearest difference is update cadence: IELTS Test Prep at fortnightly against TrigIt's every 4 months. TrigIt's advantage is device support (3 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. TrigIt sells 2 one-off in-app purchases and IELTS Test Prep sells 4 in-app purchases, starting at $14.99 per month. Whichever you choose, the download price is not the number that matters.

TrigIt ships an update every 4 months, IELTS Test Prep fortnightly. The most recent releases landed on October 10, 2026 and October 21, 2026 respectively.

## The numbers

| Metric | TrigIt | IELTS Test Prep |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/ielts-test-prep-ai-assistant/id6755227591/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 4 months | **Fortnightly** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 23 MB | 124 MB |
| Requires iOS | **15.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [SAPHI PTY LTD](https://appshunter.io/developer/1529776151) | [Oksana Siholaieva](https://appshunter.io/developer/1852706543) |

## What reviewers say

### TrigIt

[App page](https://appshunter.io/ios/app/trigit/id1529776149)

This app lets you apply trigonometry to real-world situations using your phone's camera and sensors. Measure angles and calculate heights of objects like trees or buildings. It generates clear diagrams and saves them for later use.

**Highlights:** Angle measurement tool, Inclinometer with camera/gyroscope, Adjustable offset for measurements, Generates clear diagrams, Saves diagrams to camera roll, Measures in metric or imperial units

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Worked Solution Consumable | $0.99 | one-time |
| Worked Solution | $1.99 | one-time |


### IELTS Test Prep

[App page](https://appshunter.io/ios/app/ielts-test-prep-ai-assistant/id6755227591)

Prepare for the IELTS exam with an AI assistant offering instant feedback on writing, speaking practice with real-time pronunciation analysis, and comprehensive reading and listening materials. Achieve your target band score with personalized guidance.

**Highlights:** AI-powered writing feedback, Band score prediction, AI speaking partner, Pronunciation and fluency analysis, Full-length reading and listening tests, Instant results and progress tracking

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month of Premium | $14.99 | per month |
| 1 Month of Premium | $14.99 | per month |
| 1 Year of Premium | $59.99 | per year |
| 1 Year of Premium | $59.99 | per year |


## Frequently asked questions

### Is TrigIt free?

TrigIt is free to download, with in-app purchases available.

### Is IELTS Test Prep free?

IELTS Test Prep is free to download, with in-app purchases available.

### Do TrigIt or IELTS Test Prep have ads?

Neither TrigIt nor IELTS Test Prep shows ads.

### Which is updated more often, TrigIt or IELTS Test Prep?

TrigIt ships an update every 4 months, and IELTS Test Prep fortnightly. Most recently, TrigIt was updated on October 10, 2026 and IELTS Test Prep on October 21, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*