# Trigonometry Identities Proofs vs Inkray AI

The clearest difference is price: Inkray AI at Free against Trigonometry Identities Proofs's $0.99. Inkray AI also leads on rating (5.0 vs 1.0) and update cadence (every 2 months vs every 32 months). Trigonometry Identities Proofs's advantage is in-app purchases (none vs 2) and ads (none vs shown). On ratings volume and device support there is nothing between them.

Inkray AI is free to download; Trigonometry Identities Proofs costs $0.99 up front. Inkray AI sells 2 in-app purchases, starting at $4.99 per 7 days. Trigonometry Identities Proofs asks for nothing beyond the download.

Inkray AI holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively.

Trigonometry Identities Proofs ships an update every 32 months, Inkray AI every 2 months. The most recent releases landed on October 8, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | Trigonometry Identities Proofs | Inkray AI |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | [1.0 (2 ratings)](https://appshunter.io/ios/app/trigonometry-identities-proofs/id1547838514/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/inkray-ai-note-summarizer/id6748240491/reviews)** |
| Number of ratings | **2** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 32 months | **Every 2 months** |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 18 MB | 67 MB |
| Requires iOS | **13.0** | 15.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 4+ |
| Developer | [H3Apps LLC](https://appshunter.io/developer/598620927) | [Enes Akbal](https://appshunter.io/developer/1818105395) |

## What reviewers say

### Trigonometry Identities Proofs

[App page](https://appshunter.io/ios/app/trigonometry-identities-proofs/id1547838514)

Learn and practice trigonometric identity proofs with step-by-step solutions. Compare your work to the app's detailed explanations, revealing each step individually.

**Highlights:** 42 trigonometric identity proofs, Step-by-step solution reveal, Compare your work to app solutions, Practice trigonometry, Educational math tool

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

**In-app purchases:** none


### Inkray AI

[App page](https://appshunter.io/ios/app/inkray-ai-note-summarizer/id6748240491)

Transform handwritten notes, printed materials, or screenshots into digital text and concise summaries. This AI-powered tool helps students study faster by generating quizzes from notes and organizing all study materials in one place.

**Highlights:** Convert notes to digital text, Summarize long documents, Generate quizzes from notes, Export notes and summaries, Organize study materials, AI-powered learning assistance

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Inkray AI - Pro Weekly | $4.99 | per 7 days |
| Inkray AI - Pro Monthly | $14.99 | per month |


## Frequently asked questions

### Is Trigonometry Identities Proofs free?

Trigonometry Identities Proofs costs $0.99, with no in-app purchases.

### Is Inkray AI free?

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

### Which has better reviews, Trigonometry Identities Proofs or Inkray AI?

Inkray AI is rated higher. Trigonometry Identities Proofs averages 1.0 out of 5 from 2 ratings, while Inkray AI averages 5.0 from 1 ratings.

### Do Trigonometry Identities Proofs or Inkray AI have ads?

Inkray AI shows ads; Trigonometry Identities Proofs does not.

### Which is updated more often, Trigonometry Identities Proofs or Inkray AI?

Trigonometry Identities Proofs ships an update every 32 months, and Inkray AI every 2 months. Most recently, Trigonometry Identities Proofs was updated on October 8, 2026 and Inkray AI on October 17, 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.*